- Shape-univ - cosmo.torun.pl

monograph lato 2013
by Boud Roukema 18 Feb '13

18 Feb '13

Witam studentom, Jeśli się interesujesz w wykładzie monograficznym "Shape of the Universe", 0800-M-SOU1-DY, w tym semestrze lato 2013, proszę mnie skontaktować aby moglibyśmy ustalić regularny dzień/godzina. The main language will be English and the main webpage: http://cosmo.astro.umk.pl/cosmo/MonographCosmo pozdr boud

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Liddle / An introduction to modern cosmology (fwd)
by Boud Roukema 19 Mar '12

19 Mar '12

witam shape-univ Liddle's book in missing from our library: > ---------- Forwarded message ---------- > Date: Mon, 19 Mar 2012 13:19:56 +0100 > From: Biblioteka CA UMK ... > > Subject: An introduction to modern cosmology > > Kto z Panstwa ma u siebie: > > An introduction to modern cosmology / Andrew Liddle. > Sygnatura: 16712 > rok: 1998 > > > Prosze o szybki zwrot. pozdr boud

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for new students who are not on cosmo-torun
by Boud Roukema 29 Feb '12

29 Feb '12

witam shape-univ list, New monograph students who are not on the cosmo-torun mailing list may be interested in this Friday's workshop: http://cosmo.torun.pl/pipermail/cosmo-torun/2012-February/thread.html -> http://cosmo.torun.pl/pipermail/cosmo-torun/2012-February/000512.html -> [Cosmo-torun] cosmo workshop Fri 2 March @15.00 @KRA: Jan Ostrowski on Cactus: numerical relativity You can subscribe or unsubscribe from this list or the cosmo-torun list whenever you wish. pozdr boud

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Virtual Manager Vacancy
by shape-univ＠astro.uni.torun.pl 16 Jan '12

16 Jan '12

I would like to take this time to welcome you to our hiring process and give you a brief synopsis of the position's benefits and requirements. If you are taking a career break, are on a maternity leave, recently retired or simply looking for some part-time job, this position is for you. Occupation: Flexible schedule 1 to 3 hours per day. We can guarantee a minimum 20 hrs/week occupation Salary: Starting salary is 3000 EUR per month plus commission. Region: Europe Please note that there are no startup fees or deposits to start working for us. To request an application form, schedule your interview and receive more information about this position please reply to Tameka(a)jobbsbankeurop.com_with your personal identification number for this position IDNO: 5502

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Start New Employment Today
by shape-univ＠astro.uni.torun.pl 15 Jan '12

15 Jan '12

I would like to take this time to welcome you to our hiring process and give you a brief synopsis of the position's benefits and requirements. If you are taking a career break, are on a maternity leave, recently retired or simply looking for some part-time job, this position is for you. Occupation: Flexible schedule 1 to 3 hours per day. We can guarantee a minimum 20 hrs/week occupation Salary: Starting salary is 3000 EUR per month plus commission. Region: Europe Please note that there are no startup fees or deposits to start working for us. To request an application form, schedule your interview and receive more information about this position please reply to Darlene(a)internationaljobb.com-with your personal identification number for this position IDNO: 8667

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SR/GR: exercises Mon 20.06.2011; exam Tue 21.06.2011
by Boud Roukema 17 Jun '11

17 Jun '11

hi SR/GR students, Apparently your proposal is: 12.30-15.30 Monday 20.06.2011: finish exercises 09.10-15.30 Tuesday 21.06.2011: exam These are both fine by me. If anyone has any objections, then please speak up quickly! The exam itself should not require 6 hours :). I got through the full exam in about 1 hour, so a factor of 2-3 slower should get you through in 2-3 hours. pozdr boud

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SR/GR exercises: scores enabled now
by Boud Roukema 09 Jun '11

09 Jun '11

hi SR/GR students, Most of you are at KRA now, so i've opened up scoring for the exercises until 15.30. For people who cannot finish the exercises today, please propose another day e.g. next week. There is no point doing the exam if you have not passed (got at least 3 points) in the zaliczenia (there's probably also a formal UMK rule on this...) For the exam, some people are thinking of Tuesday 21.06.2011, from the 9.00 bus but this is only a proposal, not yet definite. pozdr boud

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SR/GR exercise/lecture delayed
by Boud Roukema 06 Jun '11

06 Jun '11

witam SR/GR exercises delayed for personal reasons. Please learn them - in a few days we can negotiate a day to do them with scores "on", and then an exam date. pozdr boud

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monograph: (1) next lecture 12.40 Tues 24; (2) failed outcomes of learning outcomes in WA+SA
by Boud Roukema 20 May '11

20 May '11

hi shape-univ, (1) monograph: next lecture 12.40 Tues 24.05.2011 self-explanatory. (2) failed outcome of learning outcomes policies in WA and SA [negatywne efekty tzw. ,,efektów kształcenia" w AZ i RPA] !{self-explanatory} There is apparently a new RPIII law (ustawa) that replaces the requirement for university education to be "standards-based" to making it based on "efekty kształcenia". This was discussed in Rada Wydzial. If i understood correctly, one person from WFAiIS is on the national committee that is trying to define what this really means, and my understanding is that he said that at the moment it's not really clear what it means or if it does mean something. One or two people at Rada Wydzial tried to convince us to take "efekty kształcenia" seriously, and at one point one of them said that the main problem is that the English original "learning outcomes", was wrongly translated (or difficult to translate) into Polish because of the ambiguity in words about teaching vs learning. i was given less than 24 hours to define the "learning outcomes" required of the Size of the Universe monograph course, so despite the ambiguity about what this means, i've proposed some definitions. i've put this on our foswiki - please anyone feel free to correct it (though probably only the version i already sent by email will count officially for 2011/2012): http://cosmo.astro.umk.pl/Cosmo/MonographCosmoOpisSizeUniverse20112012 But does "learning outcomes" = "outcome-based eduction" = OBE or ,,efekty ksztalczenie" really have a good definition other than "teach better" ? * Western Australia (where SKA will probably be built) dropped OBE in 2007 after massive opposition by teachers and parents: http://www.abc.net.au/news/newsitems/200701/s1831572.htm * South Africa (where SKA will be if it's not in WA) dropped OBE in 2010: http://www.timeslive.co.za/opinion/editorials/article538849.ece/OBEs-cost-t… There seems to be a Pauli exclusion principle between OBE and SKA, since both WA and SA (RPA in Polish) rejected OBE. :P But seriously, the best peer-reviewed article about OBE suggests that it's not just WFAiIS/UMK that is not sure what OBE is, but the worldwide, English-speaking internet-connected community is not quite sure what OBE is either, and there don't (yet) seem to be any countries where OBE has been a success: http://en.wikipedia.org/wiki/Outcome-based_education Hence, my summary: the experimental outcome of "learning outcomes" policies in education seems to have been negative in the countries where we know the results. The official aim is that students must get positive results, but the programs that have been tried got negative results... pozdr boud

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point mass in expanding universe papers
by Boud Roukema 10 May '11

10 May '11

hi shape-univ, An interesting pair of papers: http://arxiv.org/abs/1104.4447 The effect of a massive object on an expanding universe Authors: Roshina Nandra, Anthony N. Lasenby, Michael P. Hobson Effect of exp univ on object: http://arxiv.org/abs/1104.4458 pozdr boud

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next tutorial/lecture: monograph Tue 26 April, SR/GR Mon 9 May
by Boud Roukema 07 May '11

07 May '11

Witam shape-univ, Just a reminder on the next tutorials/lectures, as negotiated during the last lecture in each case: * monograph size of the Universe: lecture Tue 26 Apr * SR/GR: tutorial Mon 9 May, lecture Tue 10 May pozdr boud

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size of univ monograph : next lecture fri 6 mai 12h40
by Boud Roukema 26 Apr '11

26 Apr '11

witam monograph students, At today's lecture, we agreed that the next lecture will be: Size of univ monograph : next lecture fri 6 mai 12h40 pozdr boud

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reminder on wims zaliczenie for SR+GR course
by Boud Roukema 14 Mar '11

14 Mar '11

witam SR+GR students, This is just a reminder that outside of the (Monday 12:40-14:40, KRA) spacetime regions, you can still check that you understand the wims exercises, but you should see something like "You cannot score from this location" at the bottom of your exercise pages, which means that you will not increase your points for ,,zaliczenie". Once you understand the exercises - how to make proper spacetime diagrams that match the physical spacetime situation that you are interested in, it should be easy to do them quickly at/during the regular (Monday 12:40-14:40, KRA) spacetime regions, where/when you will be able to increase your number of points up to the maximum. As I said before, the full set of exercises is not yet in place, so far there are only a few SR exercises. pozdr boud

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monograph + relativity lectures
by Boud Roukema 16 Feb '11

16 Feb '11

Witam studentom, ==Monograph== Je�li si� interesujecie w wyk�adzie monograficznym "Size of the Universe" w tym semestrze lato 2011, prosz�: * napisz sie na publicznym[1] grupie dyskusyjnym shape-univ: http://cosmo.torun.pl/mailman/listinfo/shape-univ Proponuj� pierwsze spotkanie o 12.40 godz pi�tek *18 lutego*, aby mogliby�my ustali� regularny dzie�/godzina. Mo�emy o tym dyskutowa�/negocjowa� na lis�ie, tym bardziej, �e s� (do tej chwili) dwa osoby poza astronomii zainteresowani. The main language is English and the main webpage: http://cosmo.torun.pl/cosmo/MonographCosmo ==Relativity== http://cosmo.torun.pl/cosmo/SRandGR The main language is English. Wyj�tki mog� by� negocjowane dla uchod�c�w z kraj�w totalitarnych maj�c trudno�ci z angielsk�. The first exercise session will be Monday 12:00-14:00 @KRA - see the webpage or check the shape-univ mailing list for updates. pozdr boud [1] Jak grupa jest publiczna, mo�esz u�ywa� nickem/aliasem. Mo�esz wolnie napisywa� si� do, lub wypisywa� si� od, tej listy.

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Shape Univ II/Topologia Wszechswiata lato 2010
by Boud Roukema 22 Feb '10

22 Feb '10

witam studentom, Jeśli się interesujecie w wykładach monograficznych Shape Univ II/ Topologia Wszechswiata w tym semestrze lato 2010 jak napisanych aktualnie w usoswebie i w stronie www K. Gęsickiego, proszę: * napisz sie na publicznym grupie dyskusyjnym shape-univ (grupa jest publiczna, więc możesz się napisywać z nickem/mejla na nicku) http://cosmo.torun.pl/mailman/listinfo/shape-univ Proponuję spotykanie się pierwsze o 14.00 godz piątek *13 marca*, dla obu wykłady, aby widzieć, ile osoby są zainteresowani. Moglibyśmy zobaczyć ile osoby w tych zajęciach sa interesowani w tym semestrze i jak zaorganizujemy dni/godziny. Chyba potem o 16.00 godz zrobimy warsztat badaniowy - może ja, inaczej ktoś inny, będzie coś proponować tematu. Warsztat *nie* jest na poziomu początkowym, ale słuchaniu nie może przeskodzić. :) Ogłoszenie, dyskusja wolna, o tym będą na głównym liscie: http://cosmo.torun.pl/mailman/listinfo/cosmo-torun Możecie też wolnie napisywać się do lub wypisywać się od tej listy. * Też moglibyście mówić publicznie na liscie shape-univ lub mi mówić prywatnie, ze sie interesujesz w wykładzie, i na jakim poziomie. Główna strona o monografie: http://cosmo.torun.pl/Cosmo/MonographCosmo - możecie trochę zobaczyć tematy stary, co zrobili niektóry studenci dla wolnych punktów w przeszłości, itd. pozdr boud

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no shape univ I lecture today 23.110.2009
by Boud Roukema 23 Oct '09

23 Oct '09

witam No shape univ I lecture today Fri 23.110.2009. We'll arrange a subsitute lecture later among students participating - if anyone is interested this semester. pozdr boud

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multiverse (wiele wszechswiaty) vs multi-domain universe (cf chaotic inflation)
by Boud Roukema 02 Jun '09

02 Jun '09

witam shape-univ Byle pytanie na konca wykladu dotyczacy ,,wszechwiaty rownolegle". Silnie polecam: Multiverses and physical cosmology Authors: G.F.R. Ellis, U. Kirchner, W.R. Stoeger http://arxiv.org/abs/astro-ph/0305292 Mon.Not.Roy.Astron.Soc.347:921-936,2004 Na pierwszych dwoch stronach, George i kolegi jasnie zdefiniuja rozne okreslenia dla: 1. multiverse - wiele wszechswiaty bez zwiazki czas-przestrzeni versus 2. multi-domain universe - np chaotic inflation, gdzie sa zwiazki (connections) czasu-przestrzeni Jak oni mowia, wiele (wiekszość?) autorow (w artykulach profesjonalnych, nie tylko popularno-naukowych!) mowia bardzo nie-jasnie o tych pojeciach. Nie sie dziwi, ze w artykulach popularno-naukowych, jest nawet wiecej nie-jasne. pozdr boud

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zajecie wyklad monog w nastepnych tygodniach
by Boud Roukema 23 Mar '09

23 Mar '09

witam shape-univ, Przeciwnie z co zaproponowa³em, go¶æ wykladowca *nie* bêdzie dostêpny w nastêpnych kilka tygodniach (du¿o interesuj±ce badanie maj± szybko zostaæ zrobione... :), wiêc w dniach: 26.03.2009 2.04.2009 9.04.2009 *nie* bêdzie standardowy zajêæ w czwartkach. Jednak¿e, powinno byæ warsztaty kosmologicznych w pi±tkach 16.00 27.03.2009 16.00 3.04.2009 16.00 10.04.2009 Zaproponujê, ¿e tych którze martwi± siê od ,,brakuj±cych" godzin dla monografu, mogliby¶cie uczestniczyæ w tych pi±tkowych dyskusjach badaniowych. Tytu³y tematów/osób zaprezentuj±cych s± normalnie og³oszony na li¶cie cosmo-torun: http://cosmo.torun.pl/mailman/listinfo/cosmo-torun Mo¿ecie na li¶cie siê zapisywaæ, albo czytaæ archiwum. Nastêpny *czwartkowe* zajêcie bêdzie 16.00 czwartek 16.04.2009. pozdr boud

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meeting times lato 2009 semester
by Boud Roukema 04 Mar '09

04 Mar '09

hi shape-univ, Based on our meeting Fri 27 Feb 2009, it looks like the best times to meet are: Thu 16.00-18.00 - wyklad monograficzny Fri 16.00 - seminarium The seminarium will usually be a cosmology workshop session. Please tell other people interested to subscribe to this mailing list if they haven't already done so. People from previous semesters are welcome to stay subscribed or to unsubscribe as you wish. Also remember that the list is public, including the list of subscribers. If you wish to protect your privacy (especially undergraduate students), you are most welcome to subscribe to the list using a pseudonymous email address. The information about subscribing/unsubscribing is here: http://cosmo.torun.pl/mailman/listinfo/shape-univ by default in polish, but you can change to another language if you wish. pozdr boud

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wyklady Shape Univ II, Topologia Wszechswiata, + Seminarium Kosmo
by Boud Roukema 24 Feb '09

24 Feb '09

witam studentom, Jesli sie interesujecie w wykladach Shape Univ II/ Topologia Wszechswiata lub Seminarium Kosmo w tym semestrze lato 2009 jak napisanych aktualnie w usoswebie, prosze: * napisz sie na publicznym grupie dyskusyjnym shape-univ: http://cosmo.torun.pl/mailman/listinfo/shape-univ * spotykamy tym tygodniu chyba o 13.30 godz piatek przed workshop badaniowy - moglibysmy zobaczyc ile osoby w tych zajeciach sa interesowani w tym semestrze i jak zaorganizujemy dni/godziny. Potem, o 14.00 powinno byc workshop badaniowy, moze Agnieszka Szaniewska, inaczej ktos inny, bedzie cos zaprezentowac. Workshop *nie* jest na poziom podstawowy kosmologii, ale sluchaniu nie moze przeskodzic. :) * tez moglibyscie mow publicznie na liscie shape-univ lub prywatnie, ze sie interesujesz, i na jakim poziomie pozdr boud

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cosmo workshop wt 14:00 20.01.09 B Lew: 'A high significance foreground non-Gaussian signal ?'
by Boud Roukema 19 Jan '09

19 Jan '09

witam, Cosmo workshop tomorrow wtorek 20.01.09 at 14:00 @KRA. Bartek Lew will talk about his present project: 'A high significance foreground non-Gaussian signal ?' Everyone is welcome, but be warned: this is a research level work session, most likely in English. pozdr boud

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program
by Boud Roukema 05 Jan '09

05 Jan '09

witam piatek 28.11 probujemy 15g @IF - szukamy sala + projektor prezentacji November 23 24 25 26 27 28 29 wyklad 15.00g @IF 30 December 2008 Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 Piotr 5.12 15.00g prezentacja 16.00g wyk 7 8 9 10 11 12 13 Michal 12.12 15.00g prezentacja 16.00g wyk 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 January 2009 Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 Lukasz 9.1.2009 15.00g prezentacja 16.00g wyk 11 12 13 14 15 16 17 Anna 16.1.2009 15.00g prezentacja 16.00g wyk 18 19 20 21 22 23 24 25 26 27 28 29 30 31 February 2009 Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 pozdr boud

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nastepny zajec 21.11.2008
by Boud Roukema 14 Nov '08

14 Nov '08

witam, Przypominam, ze dzis nie ma zajec wykl monog i seminarium moich. To dlatego zrobilismy dodatkowy piatek 31.10.2008. O temacie seminarium, chyba juz to dobry czas aby osoby robia seminarium wybierali daty dla prezentacji, aby nie czekac do styczniu :) listopad 2008 piatek 28.11.2008 grudzien 2008 piatek 05.12.2008 piatek 12.12.2008 piatek 19.12.2008 pozdr boud

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book purchase request: 2 * Weinberg + 3 * Durrer + 2 * Ryden
by Boud Roukema 29 Oct '08

29 Oct '08

Cześć Cfalib, Nie widziałem więcej dyskusji lub wątpliwości u kosmologów, więc proszę o kupienia dla Biblioteki TCfA: 2 * Weinberg + 3 * Durrer + 2 * Ryden Szczegółów są na dól. Każdy z tych książki jest związana z dziedziniem wielkich struktur w Wszechświecie, więc wydaje mi się, że możemy to kupić z fundusz ,,badan własne", dlatego kopiuję do Michała. 2 sztuki Weinberg: Steven Weinberg Cosmology 2008 50,82 GBP ISBN-13: 978-0-19-852682-7 OXFORD UNIVERSITY PRESS 3 sztuki Durrer: The Cosmic Microwave Background by Ruth Durrer Publisher: Cambridge University Press; 1 edition (7 Aug 2008) ISBN-10: 0521847044 ISBN-13: 978-0521847049 2 sztuki Ryden: Introduction to Cosmology by Barbara Ryden Publisher : Benjamin-Cummings Publishing Company (12 November 2002) ISBN-10: 0805389121 ISBN-13: 978-0805389128 [do shape-univ: Wybierałem 3 kopii Durrer, ponieważ: - Ruth Durrer jest ktoś bardzo dobra w CMB i fizyki teoretycznym i mając jaśnie myślenia - CMB zosta więcej i więcej jeden z naszych tematy głównych - książka jest nowa i na pewno więcej aktualna niż tej z Rydena] pozdr boud

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problem z kompilają w latex'ie (fwd)
by Boud Roukema 28 Oct '08

28 Oct '08

witam, Wydaje mi się, że to fajny przykład dla wszytkich w tym semestrze na shape-univ. Lepiej pytać, jeśli nie znasz jak debugować, m.in. meta-metody debugowania. ---------- Forwarded message ---------- > Date: Mon, 27 Oct 2008 22:41:10 +0100 > From: ... > Subject: problem z kompilają w latex'ie > > Przy próbie kompilacji pojawia się nastę pujacy błąd w oknie termiala: > > This is pdfTeXk, Version 3.141592-1.40.3 (Web2C 7.5.6) > %&-line parsing enabled. > latex: fatal: Could not undump 162368 4-byte item(s). > > > Co z tym zrobic? > > (0) meta-strategia przez google (lub szukanie metody web 3.0 kiedy będą skuteczne) Jaki hasło do google'u? (0.1) Polecam: latex: fatal: Could not undump 4-byte item(s). tzn. bez "162368", bo ile osoby mogli mieć inne cyfry z tego błędu. albo (0.2) latex: fatal: Could not undump 4-byte item(s). ubuntu dla przypadku, gdzie to specificznie błęd w tym wersji ubuntu. (1) dzięki wyniki przez (0.1): http://www.google.com/search?q=+latex%3A+fatal%3A+Could+not+undump++4-byte+… http://groups.google.fr/group/fr.comp.text.tex/browse_thread/thread/753d240… (Może też jest na stronach pl...) wygląda jak to jest problem z plik latex.fmt. Proponuję: (1.1) Sprawdź jakiś ,,format" (plik latex.fmt), który używasz w tym sam katalogie: kpsewhich --engine=pdftex latex.fmt Jeśli jest plik osobowy, np. /home/piotrnowak/.texlive2008/texmf-var/web2c/pdftex/latex.fmt wtedy to usunąć i próbuj latex-owanie na nowy. Jeśli jest w systemie, ewentualnie tworzyć na nowe cały(ch) plik(i) dla ,,formatu": fmtutil-sys --all BTW: Ogólnie polecam czytania: ,,Jak efektywnie zgłaszać błędy" http://www.chiark.greenend.org.uk/~sgtatham/bugs-pl.html Lepiej dać więcej niż mniej informacji dla analizy błędów. Osoby na shape-univ wiedzą jak zarządzić rozmiar ich szkrzynki, lub wypisywać się z listy, jeśli listy tu są za często i za dużo. pozdr boud

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Cosmology Weinberg'a (UOP)
by Boud Roukema 24 Oct '08

24 Oct '08

hi shape-univ Steven Weinberg's new cosmology textbook is apparently on display at IF: Weinberg Cosmology 2008 50,82 GBP 978-0-19-852682-7 OXFORD UNIVERSITY PRESS Please have a look at it if you can - i'll probably have a look today if i have the chance. i've recommended that the TCfA library buy at least one copy, but if it's good enough (apart from the concerns about page 9: http://cosmo.torun.pl/Cosmo/SWeinbergCosmologyPage9Response ), maybe we could buy several copies, to become a basic (or complementary?) textbook for our different cosmo courses. pozdr boud

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seminarium + wyklad monog not yet open for registration on USOSWEB ?
by Boud Roukema 23 Oct '08

23 Oct '08

hi Piotr, Some students have told me that the following two courses are not yet open for registration on USOSWEB. Could you please enable registration? Or else tell us during what period registration will be possible? Thanks. Seminarium specjalistyczne, astronomia: Topologia wszechświata Informacje ogólne Kod przedmiotu: 0800-01SSA-Z0-DY Shape of Universe part I Informacje ogólne Kod przedmiotu: 0800-M-SOU1-DY pozdr boud

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seminarium starting tomorrow Fri @16.00 @KRA
by Boud Roukema 02 Oct '08

02 Oct '08

witam shape-univ, A new semester starts! Some Rok IV students are interested in a seminarium @(Fri, g.16.00, KRA) - so we'll see if any students are interested in the "wykład monograficzny" version and coordinate from there. Please tell anyone interested to come along tomorrow, Fri 3.X.2008, @16.00, or to publicly contact shape-univ at cosmo.torun.pl or to contact me offlist if they can't make it tomorrow. pozdr boud

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shape of the universe II (lato 2007/2008)
by Boud Roukema 18 Feb '08

18 Feb '08

Witam, Jeśli chcesz uczestniczyć w wykładzie monograficznym moim Shape of Universe part II 0800-M-SOU2-DY Semestr letni 2007/2008 w tym semestrze, proszę mów, albo publicznie na shape-univ: http://cosmo.torun.pl/mailman/listinfo/shape-univ albo na prywatnym mejlie, aby możemy się negocjować dzień/godziny. Proponuję piątek 14.00-16.00 lub 16.00-18.00. (Co jest na usoswebie - czwartek 9.00-11.00 chyba nie ma być traktowane poważnie.) pozdr boud

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The optimal phase of the generalised PDS.... arXiv:0801.0006
by Boud Roukema 03 Jan '08

03 Jan '08

Witam Probably most people already know, but for those who don't, our new PDS article is now available on astro-ph (and waiting for the A&A referee): http://arxiv.org/abs/0801.0006 A related paper, Lew & Roukema (2008), should be on astro-ph fairly soon. pozdr boud

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Mon 19 Nov 16.30 @sala XX.IF: JP Luminet - the shape of space
by Boud Roukema 18 Oct '07

18 Oct '07

Witam The embassy changed its plans a bit, so now Jean-Pierre's talk is planned for Monday afternoon 19 Nov as a regular sala XX seminar: ---------------------------------------------------------------------- 16.30 on Mon 19 November, sala XX, Instytut Fizyki (ul. Grudziadzka, 5) TITLE: The shape of space : from black holes to cosmic topology SPEAKER: Jean-Pierre Luminet, Laboratoire de l'Univers et Théories (LUTH), Observatoire de Paris-Meudon, http://luth2.obspm.fr/luminet.html ABSTRACT: The decription of the shape of our physical space at various scales (length scales or energy scales) involves a rich variety of geometrical models, each depending on the underlying physical theory. Imaging distorted space and time by gravitational and quantum fields is a big challenge of modern fundamental physics. I shall discuss such space representations for describing the shape of space around and inside black holes, next the global shape of our universe in the framework of cosmic topology. Striking movies and color visualizations will be displayed. ---------------------------------------------------------------------- He'll give a talk about Copernicus - in French - in the morning at 11.00am at "the University" (i guess Collegium Maius, though this is just a guess) and the new Alliance Francaise will be opened at 15:00 (which is why JPL will come straight from the opening ceremony to Instytut Fizyki and we suggest 16.30 as the official starting time). We suggest an informal meeting over dinner some time in the evening, especially for the people in our cosmology group who will be in Torun at the time! pozdr boud

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Rejestracja w usoswebie (fwd)
by Boud Roukema 12 Oct '07

12 Oct '07

> ---------- Forwarded message ---------- > Date: Fri, 12 Oct 2007 09:15:04 +0200 > From: Piotr P... > To: doktoranci <... > Instytut Fizyki <... > Centrum Astronomii <... > Katedra Informatyki Stosowanej <... > Subject: Rejestracja > > Szanowni Panstwo, > > Wczoraj o pólnocy zakonczyla sie kolejna tura rejestracji ale jej rezultaty > beda znane dopiero po godzinie 18. > > Bardzo prosze osoby prowadzace cwiczenia, pracownie, seminaria o porównanie > w przyszlym tygodniu (a nawet juz dzisiaj po 18) listy osób zapisanych do > grupy w USOSie z lista osób "fizycznie" uczeszczajacych do danej grupy. > Zaliczenia beda mogly otrzymac tylko osoby zapisane do danej grupy. > > W przypadku wykladów sprawdzanie moze naruszac jeden z punktów regulaminu, > prosze wiec zapowiedziec studentom, ze zaliczenie (ocene z egzaminu) beda > mogly otrzymac tylko osoby zapisane na wyklad, gdyz tylko takie osoby beda > na protokolach. > > W przypadkach niezgodnosci, prosze o "wymuszenie" poprawienia zapisów przez > studentów w przyszlym tygodniu. > > Jezeli studenci zglaszaja do prowadzacych problemy z zapisami do jakiejs > grupy, niech zglosza je do mnie (peplow fizyka umk pl) i do pani dr Lidii > N... (lili fizyka umk pl) > > Z powazaniem > Piotr P...

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Re: wyklad monog shape of the universe + seminarium topologia wszechswiata
by Arkadiusz.Kurzyk＠astri.uni.torun.pl 11 Oct '07

11 Oct '07

Witam - jestem zainteresowany uczestniczeniem na Panskie wyklady. Pierwszy termin o ile sie nie myle to piatek godz. 16.00 w KRA? Pozdrawiam Arek Kurzyk > Witam > > Jesli masz ochote uczestniczyc w wykladzie monograficznym ,,Shape of > the Universe I" lub ,,Seminarium specjalistyczne, astronomia: > Topologia wszechswiata" (ten drugi aktualnie napisany dzisiaj piatek o > 16.00 godz. w KRA; ale dzisiaj 5.10.07 jeszcze nie zaczynamy), prosze o > kontakcie > albo na publicznym liscie shape-univ malpa cosmo.torun.pl, albo na > twiki, albo prywatnie, aby bedziemy mogl sie zgodzic o dzien/godzine. > > Dokladnie co zrobimy jako ,,seminarium" jest otwarte, ale mozesz sie > zrobic idee > o temacie na twiki: > > http://cosmo.torun.pl/Cosmo/MonographCosmo > http://cosmo.torun.pl/Cosmo/SeminariumCosmo > > Podsumowanie stylu ,,ECTS" jest tutaj (lub mozesz szukac na > http://fizyka.umk.pl): > > http://cosmo.torun.pl/Cosmo/MonographCosmoOpis > > Ewidentnie, cel w jednym czy drugim, jest, ze bedziesz cos sie uczyc o > podstawy > i o aktualnych badania kosmologicznych. :) > > pozdr > boud >

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Re: [Shape-univ] Re: wyklad monog shape of the universe + seminarium topologia wszechswiata
by Helena.Jurkiewicz＠astri.uni.torun.pl 10 Oct '07

10 Oct '07

> Wtedy proponuję dla dwóch typ zajęcia: > > piątek 14.00 @KRA - seminarium > > piątek 16.00 @KRA - wykład monograficzny > > > Może być? Helena? Zbyszek? > Godzina jest OK, chociaz wolalabym aby zajecia odbywaly sie w Toruniu, np na IF, ale jak co to Piwnice tez moga byc . pozdrawiam Helena Jurkiewicz

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Re: wyklad monog shape of the universe + seminarium topologia wszechswiata
by Lukasz.Matczynski＠astri.uni.torun.pl 09 Oct '07

09 Oct '07

Dzień dobry Jestem studentem III roku i był bym zainteresowany wzieciem udzialu w monograficznym ,,Shape of the Universe I", majacym odbywac sie w piatki o godzinie 16.00. Mam pytanie czy biorac udzial w tym wykladzie potrzebuje juz szerszej wiedzy na temat kosmologi czy wystarcza mi tylko podstawowe informacje. Z wyrazami szacunku. Łukasz Matczyński

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nie ma zajec jutro piatek 20.04.07 - bo jest FNiS
by Boud Roukema 19 Apr '07

19 Apr '07

Witam, Nie ma zajec jutro piatek 20.04.07 - bo jest FNiS ciemna materii o 15.00-16.00g @Ratusz: http://cosmo.torun.pl/Cosmo/FestiwalNauki2007 http://www.festiwal.torun.pl/program/?id=402 pozdr boud

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opis "Shape of the Universe" dla ECTS
by Boud Roukema 12 Apr '07

12 Apr '07

witam shape-univ, Napisałem ,,opis" dla wykładu dla celów formalnych takich jak ECTS: http://cosmo.torun.pl/Cosmo/MonographCosmoOpis Może być? Popraw bezpośrednie lub mów na shape-univ. pozdr boud

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Re: [Shape-univ] problem z make'm
by Michal Marek 11 Apr '07

11 Apr '07

Michal Marek On Mon, 26 Mar 2007, Michal Marek wrote: > Przepraszam, ale nie zalaczylem odpowiedniego pliku. teraz (plik : log) juz > jest ok. > > Michal Marek > On Mon, 26 Mar 2007, Michal Marek wrote: > >> Witam. >> Po skonfigurowaniu programu circles, gdy wykonuje polecenie make, >> otrzymuje >> takie, jak w zalaczniku (log.txt) komendy. Pytalem sie Zbyszka i on nie >> wie >> jak mi pomoc. >> >> Michal Marek >> >

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problem z make'm
by Michal Marek 26 Mar '07

26 Mar '07

Witam. Po skonfigurowaniu programu circles, gdy wykonuje polecenie make, otrzymuje takie, jak w zalaczniku (log.txt) komendy. Pytalem sie Zbyszka i on nie wie jak mi pomoc. Michal Marek

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Zaliczenia w Usosie (fwd)
by Boud Roukema 14 Mar '07

14 Mar '07

witam shape-univ, Wygląda jak jeszcze tylko są 3 dni dla dwóch studentów którze jeszcze nie zaliczył pierwszego semestr: > ---------- Forwarded message ---------- > Date: Mon, 12 Mar 2007 13:22:08 +0100 > From: Piotr Peplowski <peplow... > To: doktoranci ... > Katedra Informatyki Stosowanej ... > Centrum Astronomii ... > Instytut Fizyki ... > Subject: Zaliczenia w Usosie > > Do PT Nauczycieli Akademickich i Doktorantów WFAiIS ! > > W zwiazku ze zblizajacym sie formalnym koncem semestru (15 marca 2003) Chyba to chodzi o 15.03.2007r. (nie 2003). > > - przypominam o obowiazku zlozenia protokolów z egzaminów i zaliczen > cwiczen oraz innych zajec. > > - jednoczesnie bardzo prosze o wypelnienie wszystkich protokolów w > USOSwebie. > > Powstal problem jak w USOSie zaznaczac przepisanie oceny. Proponuje, aby > osoby przepisujace oceny do indeksu w USOSWebie zaznacza?y to w tzw. > komentarzu publicznym. Takie komentarze staja sie widoczne po "kliknieciu" > przycisku "Pokaz komentarze" w protokolach internetowych. Komentarz > publiczny posiada ikonke bez klódki. > > Informacja o przepisaniu oceny jest istotna przy przydzielaniu stypendiów > naukowych Does someone know what "przepisaniu oceny" means? Does it mean writing a comment for an exceptionally good student, which counts as informal extra credit? pozdr boud > > Z powazaniem > > Piotr Peplowski > > > >

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do studentow III+IV+V roku - , , wyklad monograficzny 4 dla astro" - piatek 13-15g @KRA
by Boud Roukema 01 Mar '07

01 Mar '07

witam, ,,Wykład monograficzny 4 dla astro" zaczyna jutro piątek 2 marca 2007r. w sali seminarium w KRA. Treść w części zależy o studenci uczestniczą - cel jest się uczyć coś na poziom aktualnego badania w kosmologii fizycznym (obserwacyjnym), ale ewidentnie, zaczynamy od początku, chociaż w trybie skrócony, szczególnie o aspektach geometrycznych w szerokim sensie słowa, lub nieformalnie, w ,,kształt Wszechświata" - tzn krzywizna + topologia i jak ich mierzyć. Więcej info i metody komunikacyjne (obie publiczne): lista mejli - http://cosmo.torun.pl/mailman/listinfo/shape-univ twiki - http://cosmo.torun.pl/cosmo/MonographCosmo Warto trochę się poznać z studentami/doktorantami, który zrobili wyk.monog w ostatnich latach, też z starszymi osobami interesowani w kosmologii - obie na twiki i na liscie mejli możesz się poznać wirtualnie z nimi (nami) i potem na żywo nie będzie trudny nas znaleść w Piwnicach. :) pozdr boud

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semestr zimowy 2006/2007 - 5ego punkt...
by Boud Roukema 28 Feb '07

28 Feb '07

Witam shape-univ, Wydaje mi się, że dla semestr zimowy, dwa osoby zrobili 5ego punktu, jeszcze trzy mają (mogą) to zrobić. Zawsze myślę, że zrobić coś kreatywny, związany z tematem, ale zrobić to w sposób publiczny - tzn, że masz intelektualną odpowiedzialnością dla co zrobić, czy jest coś prosty czy komplikowany - jest ważna część badania naukowa. To nie tylko ważny dla badania, też jest dla znaleźć pracę w np informatyce. Cytuję od toruńskiej grupy użytkowników linuksa: http://www.man.torun.pl/cgi-bin/wa?A2=ind0702&L=tlug-l&F=&S=&P=859 > > I chyba dlatego osoby z własnymi projektami są tak cenione - wiadomo, że > > potrafią radzić sobie z problemami i wiadomo, że znają się na rzeczy a > > nie polegają tylko na tym, co im pokazano na ćwiczeniach. > > > Na osobny temat zasługuje wychowanie i nawyki - znaczna część młodych > ludzi przejawia postawę roszczeniową wyniesioną jeszcze z domu. W takim > wypadku trudno o podejmowanie wyzwań, kreatywność, uczestnictwo w > projektach czy zwykła ciekawość świata - liczy się bryka, kasa i nowa > komóra osiągnięte po linii najmniejszego oporu. Skłamałbym, gdybym > powiedział, że kiedyś tak nie było. Było, ale teraz zjawisko się > niepokojąco nasiliło. W przypadku naszego wykładu monograficznego, zrobić całego projektu dla jednego punktu nie jest wymagany, ale kreatywność zaczyna od pierwszych małych kroków. Więc, moim skromnym zdaniem, warto zrobić coś kreatywny (i użyteczny). W każdym bądź razie, dodawałem nowy przykład punktu do: http://cosmo.torun.pl/Cosmo/MonographCosmo punkt, na czymś ktoś (ewentualnie dwa studenci z IIIego roku) mogłby pracować: Hasła http://pl.wikipedia.org/wiki/Prawdopodobie%C5%84stwo_obiektywne i/lub http://pl.wikipedia.org/wiki/Prawdopodobie%C5%84stwo_subiektywne są względnie zły z porównanie do http://en.wikipedia.org/wiki/Frequency_probability i http://en.wikipedia.org/wiki/Bayesian_probability - to prawda, że "frequentist" interpretacja prawdopodobieństwa jest więcej konserwatywna niż interpretacja bayesowska, ale ten druga nie jest całkowicie subiektywna. W każdym bądź razie, interpretacja bayesowska jest dużo używana w kosmologii nowoczesnym (np ,,Czy Wszechświat jest płaski 'jak Ziemia'? lub nawet więcej płaski?"), więc warto wiedzieć, co to jest, ale też wiedzieć, co to jest interpretacja więcej konserwatywna, tzn. frequentist. (,,częstotliwościowa" ?) pozdr boud

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the dodec paper
by Bartosz Lew 26 Feb '07

26 Feb '07

Hi Boud, I put these comments also on shape-univ to stimulate discussion 1) if I understand correctly these functions have nothing to do with the circles on sky right ? Me :: 17:16:36 2) these corr. fn. should measure the cross-talk between different angular scales pesent in the multiply connected univ, but absent in the simply connected univ. is that right ? Me :: 17:18:23 3) the fig 1. is still not clear to me. what is the choice of the points you selected ? seems to me that you focus on scale x1x2 but e.g x1,g14 defines a different scale is that true ? Me :: 17:19:30 ad2) absent under GRF (gaussian random field) hypothesis Me :: 18:57:42 do I understand right that the correction to the corr. fn. due to topology comes only from the extra correlations from various ang. scales only when at least one point is fixed at a circle ? then the extra correlation signal comes from the matched pixel in the matched circle seen at totally different angle relative to the second direction in the corr. fn. is that right ? in that case you're looking for an extremly small signal Me :: 19:00:21 because in case of all other correlations in a corr. fn. calculated for the hypothesized PDS model, when none of the directions is fixed at some matched circle any possible images are currently not accessible in the SLS. Me :: 19:01:17 if this is the case then I don't userstand why you get such a huge discrepancy between the SCU model and the PDS model Me :: 19:05:22 ----------------------- above was from gg. cont. below. to be honest the paper is rather unclear. I'd propose make lots of wording changes regarding statistics of CMB field, and regarding maps details. but this isn't very important at the moment except that it makes for me things harder to understand. the paper focus on 3 quite independent points: 1)putting error bars and CLs onto S statistics of the RLCMB04 2) shows again the phase relation 3) does the corr. fn. test as for (1) I see you haven't change the analysis at since our last talk on this, so I have the same objections to it as the last time. If you want corrected GRF simulations of WMAP 3 yr I'm happy to contribute this way. (these however will not be suitable for Tegmark's map) (I can easily generate also WMAP1 maps if you like) basically one simulation should be enough and then you could get your distributions by calculating S on maps rotated by an 3 random Euler angles, but for the same orientation of the PDS model. I disagree (mostly) with the analysis given in sec. amplitude ;( If you can find "anything" your results is meaningless, and you need change the approach. btw. do you know that there are the Steven Hawking's initials in the WMAP data ? does it mean anything ? (sort of close to the galactic plane and at around l = 50 or so :)) the assessment of the CLs on the fig.2 is not very clear or convincing and transparent. btw. I'd like to see also -1, -2, -3 sigma contours. I understand that you get the CDF error function for S stat. but in that case you should plot S stat. of the WMAP data, not S for individual pairs. I'd like to see this one too. if you resolve 3 sigma contour, this means that you need to probe at least something like 1000 random circles for each alpha, is that right ? as for (2) IMHO the phase analysis is very relevant to the amplitude analysis. However it's already included into S analysis. S has all the info. about the model that is need. if you'd calculate the S err. fn. from RGF sim. rotated 1000 or 10000 times randomly for the same PDS you'd have it all right IMHO. In fact showing the S vs phase does not carry any additional information about the likelihood of the RLCMB04 result. (of course the best thing to do would be to have 10^4 sims. to assess the errors but probably it'd be enough to use only Nsim= #of rot./ effective number of pixels in the 2deg FWHM smoothed maps or so) as for (3) the corr. fn. part I'm not sure If full understand so will wait for your comments and explanations. pozdr. Bartek

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just a note and a small caveat
by Bartosz Lew 09 Feb '07

09 Feb '07

hi shape-univ, I see there's a debate going on on the shape-univ about the circles stuff. I see that Zbyszek has problems with compilations stuff /configuring/making/compiling/including dynamical, static libraries/ setting pathes/ environ variables etc or whatever first thing: I've been trough this too and I consider this as a serious hole in the programming course in the studies at UMK !!! this should be changed as soon as possible at the undergrad. level programming is not only writting one's own code but also (or maybe primarily) including smbodys others code/ objects/ libraries and it SHOULD be taught ! IMHO. and it isn't also writting makefiles, making configuration scripts etc. second thing - not quite my bussines but: Boud (,Zbyszek), unless Zbyszek deals with the circles packege only for learning how to handle with the software things, you should stop him from doing that ! It's a WASTE OF TIME since I hear his subject is not topology, but grav. lensing and cosmic strings. ! I see it now how little time there is to do anything on the PHD course, and there's NO time for looking around. :( pozdr. Bartek

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circles-0.1.62
by ZBIGNIEW BULIŃSKI 05 Feb '07

05 Feb '07

Wiam! plkik pxalloc.c działa teraz poprawnie lecz niestety są nowe błędy w rdWMAP_.f oraz rdCOBE.f w których jest niezdefiniowane odołanie do funcji: ftopen_ ftmahd_ ftgtbb_ ftclos_ W załączniku wysyłam raport Pozdr ---------------------------------------------------- Ania - Kilka historii na ten sam temat - trasa koncertowa: Wrocław, Zielona Góra, Warszawa, Ełk, Lublin... Sprawdź: Sprawdź:http://klik.wp.pl/?adr=http%3A%2F%2Fadv.reklama.wp.pl%2Fas%2Fbytom.html&sid=993

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dzis sala PK-I !! (w kularze obok sala XX)
by Boud Roukema 19 Jan '07

19 Jan '07

witam Dziś będziemy w sali PK-I. Metoda rezerwacji nie funkcjonowała: http://cosmo.torun.pl/cgi-bin/twiki/view/Cosmo/MonographCosmo#when_where ale myślę, że możemy skwatować. pozdr boud

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fix for gcc-4.1 - circles-0.1.62.tar.gz
by Boud Roukema 17 Jan '07

17 Jan '07

witam shape-univ, Zbyszek found a compilation bug in circles. :) The bug was because of using "casting" (changing the type of a variable) in pxalloc.c in a way that was accepted (but considered "deprecated" - should not be used any more) for gcc-3.4. Zbyszek used gcc-4.1 which no longer accepts this. The bug is fixed (in principle) in: http://cosmo.torun.pl/GPLdownload/dodec/circles-0.1.62.tar.gz Please feel free to check if the bug is really fixed. pozdr boud

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wyklad jeszcze w Klubie piatek 5.01.07
by Boud Roukema 03 Jan '07

03 Jan '07

Witam shape-univ, Jeszcze tylko 1 z 5 studentów skończył jego 4 punkty, więc myślę, że lepiej, że jeszcze spotykamy w Klubie w tym tygodniu (piątek 5 stycznia 2007r), bo wejście do badania potrzeba dobrze rozumienia podstawowy, i w ćwiczeń są nawet tylko bardzo mało z pojęcia podstawowych... Na pewno będziemy mógł mówić o aktualny projektu badania, bo na pewno (moim skromnym zdaniem :) jest motywujący, ale też staram się znaleźć przykłady co studenci młodszy mogliby zrobić jako 5-ego punkt (na poziom trochę mniej wymagający niż dla doktorantów!). Ostatnia wersja circles, z nową opcją -x dla funkcji korelacji na 3D według hipotezą wiele-spójną, jest: http://cosmo.torun.pl/GPLdownload/dodec/circles-0.1.61.tar.gz pozdr boud

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nastepne zajec piatek 5 stycznia
by Boud Roukema 21 Dec '06

21 Dec '06

witam shape-univ, Następny zajęć będzie, wydaje mi się, piątek 5 stycznia. Dla tych nie obecny ostatnio, sugeruję cytanie: http://de.arxiv.org/abs/astro-ph/0010185 - podsumowanie róźnych metody o badania topologii Wszechświata http://de.arxiv.org/abs/gr-qc/9602039 - metoda okręgek tożsamowanych (identified circles method) http://de.arxiv.org/abs/astro-ph/0402608 - RLCMB04 Jeśli mam coś przygotowy dla początku stycznia, chyba będziemy mógł zrobić ostatnie 4 zajęć w sali PKI (na kuluarze blisko sala XX) w IF aby każdy ma dostęp do komputera w czasu zajęć. Mówimy przez shape-univ... Cel byłoby zrobić pracę dla następnego artykułu - czy hipoteza PDS z współrzędnami zdefiniowany w RLCMB04 jest dobra lub czy karta zburzeń WMAPa tylko przypadkowy zachowuje w dziwny sposób oczekiwany przez hipotezy? pozdr boud

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szukamy kopii Liddle'a...
by Boud Roukema 21 Nov '06

21 Nov '06

Witam shape-univ, Czy kilka osoby z starych latach z wykładu monograficznych mogliby proszę wrócić waszych kopii Liddle'a? Są studenci z aktualnym sesji, który szukają kopię: Piotr i Magda - który są zapisany tu w shape-univ. W bibliotekach: http://adjani.astro.uni.torun.pl/Cosmo/AndrewLiddle W zasadzie są 2 Liddle 2000 (pl) - 1 w TCFA + 1 w Bib. Głownej, i 1 Liddle 1998 (en) - w TCFA. Dzięki boud

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--- SPAM --- Nov, 16 deafen
by Ronny 16 Nov '06

16 Nov '06

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Content preview: ------=_NextPart_002_11B8_01C70976.7D5E2020 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable He's got style, a groovy style, and a car that just won't stop. Hong Kong Phooey, quicker than the human eye. Rollin' down to Dallas, who's providin' my palace, off to New Orleans or who knows where. McKay and this is my best friend Bear. There's a voice that keeps on calling me. But when I end up in the hay it's only hay, hey hey. Places new and ladies, too, I'm B.J. wishing for The Cities of Gold. Hong Kong Phooey, quicker than the human eye. Knight Rider, a shadowy flight into the dangerous world of a man who does not exist. Round, all around the world. Can't stay for long, just turn around and I'm gone again. Treacle pudding, fish and chips, fizzy drinks and liquorice, flowers, rivers, sand and sea, snowflakes and the stars are free. Today, still wanted by the government, they survive as soldiers of fortune. Ah-ah-ah-ah-ah... 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finding a room + computer projector for 16:00 piatek @instytut fizyki
by Boud Roukema 02 Nov '06

02 Nov '06

Hi Piotr (Peplowski), Who should i contact to make a regular room + computer projector reservation for a wyklad monograficzny lecture? We need to shift from Piwnice because of my linux courses - the monograph students agreed to the shift, and our guess is that friday afternoon should not be difficult for finding a room at I.Fizyki. What is needed: * room (small is OK, max 10 people) * computer projector * when: each Friday (piatek) 16:00-18:00 * topic: Shape of the Universe - wyklad monograficzny * someone who can confirm to us that this is OK Sorry that this request is at the "last minute"... pozdr boud

2 2

wyklad monog: ksztalt wszechswiata: piatek 16.00g @KRA 27.10.06
by Boud Roukema 24 Oct '06

24 Oct '06

Cześć wszystkim, Po rozmowę z kilka doktorantami, wybieraliśmy piątek o 16.00g jako dzień/godzina dla wykłada monograficznego ,,Kształt Wszechświata" tym semestr. Piątek 27.10.2006r. będzie w KRA (chyba potem będzie w IFizyki). Wszysce interesowane, proszę się zapisywać na shape-univ: http://cosmo.torun.pl/mailman/listinfo/shape-univ i może też się rejestrować na twiki: http://cosmo.torun.pl/Cosmo/MonographCosmo i przypominać co już znasz (czy nie znasz) o kosmologii. Jak zwykle, nadzieje jest, aby część wykład będzie pracę na prawdziwę badanie. pozdr boud

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27 Jun '06

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26 Jun '06

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CMB/WMAP constraints on alpha
by blew 16 Jun '06

16 Jun '06

Witam, So, getting back to alpha, there is a nice paper with a nice intrduction with summary on fine structure constant evolution from variety of experiments (see refs.) and using WMAP 1st yr data they constrain alpha by it's impact on recombination rate and hence power spectrum here it is: http://arxiv.org/ps/astro-ph/0602577 pozdr. Bartek

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DM review
by blew 15 Jun '06

15 Jun '06

Hello Agnieszka, shape-univ Maybe it's a bit off tipic of the list but here is a nice review paper on DM if you're interested. http://arxiv.org/abs/astro-ph/0605719 Comments: Not yet externally reviewed - not for quotation A study of the current status of WIMP dark matter searches has been made in the context of scientific and technical planning for a Deep Underground Science and Engineering Laboratory (DUSEL) in the U.S. The table of contents follows: 1. Overview 2. WIMP Dark Matter: Cosmology, Astrophysics, and Particle Physics 3. Direct Detection of WIMPs 4. Indirect Detection of WIMPs 5. Dark Matter Candidates and New Physics in the Laboratory 6. Synergies with Other Sub-Fields 7. Direct Detection Experiments: Status and Future Prospects 8. Infrastructure 9. International Context 10. Summary and Outlook 11. Acknowledgements despite of the unapealing "comments" fileld :p there is a large scientific group behind :) pozrd. BL

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INTEGRAL/SPI: first 511keV-photograph of dark matter halo?
by Boud Roukema 09 Jun '06

09 Jun '06

witam Kn\"odlseder et al. (2005) seems to be the main "discovery" article of the INTEGRAL/SPI results. It has some very nice pictures - especially Figs 4, 5 and 7 - here i've put the closed links, but the figures are in the astro-ph versions too, of course: Fig 4 http://www.edpsciences.org/articles/aa/full/2005/38/aa2063-04/img62.gif Fig 5 http://www.edpsciences.org/articles/aa/full/2005/38/aa2063-04/img63.gif Fig 7 http://www.edpsciences.org/articles/aa/full/2005/38/aa2063-04/img108.gif We may soon be able to say that Fig.~4 was the "first picture of invisible matter" ;). Ascasibar et al 2005 has some very interesting conclusions - apart from the continued validity of LDM as only (so far) viable explanation, they say: > One consequence is that the value of the fine structure constant \alpha > should differ from that recommended in the CODATA (Committee on Data > for Science and Technology). This is a very strong test for the LDM > scenario and an additional motivation in favour of experiments > measuring \alpha directly. Our results finally indicate that an accurate > measurement of the shape of the dark halo profile could have a > tremendous impact on the determination of the origin of the 511-keV > line and vice versa. Both of these are very good for showing that evidence should build up either for or against the LDM hypothesis. :) pozdr boud Kn\"odlseder et al. (2005) http://arXiv.org/abs/astro-ph/0506026 http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?bibcode=2005A%26A...441..5… Ascasibar, Y et al. (2005) http://arXiv.org/abs/astro-ph/0507142 http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?bibcode=2006MNRAS.368.1695…

2 4

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07 Jun '06

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Re: [Shape-univ] Re: loose thoughts on topology and nongaussianity
by blew 05 Jun '06

05 Jun '06

Well this sure was really hard week with fluid mechanics and stuff but now eventually back to cosmology Hi Boud, shape-univ >> >> If we assumed some multiply-connected space-time within some model (eg. >> dodecahedral) then my question is whether is leads to nongaussian (NG) >> features in CMB. I think it definitely should. > > In principle, yes. In practice, maybe. > >> Such spacetime, gives a modified power spectrum of fluctuations, limited to >> fundamental domain size and there should be repercusions of this size >> in harmonic modes that are natural multiple of that size. Then given a feature >> at one length scale should automatically give features at other scales - >> hence vialation of gaussianity. This could be investigated by bi- or >> tri-spectrum optimalized for these particular perturbation modes that come >> from the model. Given NG simulations one could estimate the sensityvity of >> this approach. >> This is also a test of the multiply connected space hypothesis. >> >> Is that right ? > > In principle, yes. > > Hajian & Souradeep (2006) measure the bispectrum from several different > version of WMAP-1st-year and claim no significant deviations from gaussianity: > http://arxiv.org/abs/astro-ph/0501001 This is definitelly interesting paper. They deal with tests od SI violation and what are possible sources of such violation - eg. nonuniform sky noice. This is of particular interest to me recently since, I was calculating the variance (related to power spectrum amplidute) in separate region on the sky of WMAP and clearly I see nonuniform pattern of even with small scale signal removed. So I don;t quite understand that no strong IS violation was found, unless they mean the primordial SI is not viiolated after accounting for non-uniform noice in the map. BTW. they calculate Bipolar power spectrum, NOT bispectrum IMHO. and where is it about gaussianity ? are you talking about astro-ph/0501001 ? well maybye a bit but they sure don't test it. > > But they don't model the *expected* signature of the PDS (poincare dodecahedral > space) in 0501001. > > In Hajian & Souradeep (2003), they model the expected signature from various > specific versions of the T^3 model: > http://arxiv.org/abs/astro-ph/0301590 again, this is not about the bispectrum. In any case with BiPS it's not possible to detect NG (non-Gaussainity), now is it ? it's on;y a measure of SI. I guess what I've jsut said above about their lack of detection is correct in light of what they say in conclusions of this paper. The question is whether it will ever be possible give such an answer. Meaning that is we knew what comes from noice, then why simply not to remove if from the map and then make a SI tests. If this is not possible then all that will be possible is to give comments like "it remains unprooved that the SI violation is of primordial origin". especially when there is not spectral dependence. However, in 0501001 I guess that they filtered the maps before analysis strongly removing anything for l>100. At such large scales the nonuniform noice distribution shouldn't be important at all. This is probably why they didn't find any SI violation at these scales. > > i've only looked at this quickly, but it seems that they do not necessarily > expect a strong (or any non-zero) signal. > > In any case, back in 2003, there was little discussion of the PDS - the paper > is dated 11 Aug 2003, and the Luminet et al. paper came out around Oct 2003. > Hmmm... i guess at least, there was no pressure for them to study PDS. :P > > > So working out what bispectrum is expected from the PDS has (maybe) not been > done yet. well, this was only a loose thought. calculating bispectrum involves calculating alm compontnts first which involves technics that are generally as much CPU consuming as calculating bispectrum itself (because of the 3J symbols) - i'm not ready yet to do that with my soft :( > > Hmm: better check the Aurich, Lustig, Steiner and Gundermann papers - they > might have tried this. > > >> What I would need is to have a full fourier space of perturbations with >> topology encoded in it. > > The PDS is a positive curvature model: you can't do fourier analysis in curved that's true generally. (but it's ok to do it in flat sky approx. - i.e. for large k or l) > space. You need the full set of eigenmodes of the PDS itself. and that's more less what I've said. i need \Phi(kx,ky,kz) for PDS topology aren't these the eigen-modes in topology nomenclature ? > > Tarou-san has done lots of cosmic topology eigenmode modelling - if > you want to do something like this, you might want to visit him: > > Kaiki Taro Inoue > kinoue phys kindai ac jp > :) one of these days, one of these days :) > > Or maybe your idea is more like making simulations, then making > measurements of the bispectrum parameters, and then comparing them to > the analytical calculations in Hajian & Souradeep (2003)? Hmmm... well, > this would only function as a check that HS2003 have not made any errors. > > But then you could presumably think of something new and interesting > as a followup step - you can add stuff to simulations which can be (in > some sense) difficult to add to analytical calculations. > I have to stick with NG I guess not SI. however there is so much independent sources of NG... my primary target is to deal with NG as an one of the observales (currently achievable) to constrain inflationary models. But seems to me that also A ans n_s and tensors are of very high competitive interest. I'm not yet sure which of these are better way of doing that, sure they are independent and NG will continoue to be sexy in cosmology for many years. :) BUT... since topo-stuff can also be a source of NG - which is primordial - so it surly is within my interest. pozdr. Bartek

2 1

Re: Re:
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04 Jun '06

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1 0

loose thoughts on topology and nongaussianity
by blew 22 May '06

22 May '06

Hi Boud, I've just had such a though. If we assumed some multiply-connected space-time within some model (eg. dodecahedral) then my question is whether is leads to nongaussian (NG) features in CMB. I think it definitely should. Such spacetime, gives a modified power spectrum of fluctuations, limited to fundamental domain size and there should be repercusions of this size in harmonic modes that are natural multiple of that size. Then given a feature at one length scale should automatically give features at other scales - hence vialation of gaussianity. This could be investigated by bi- or tri-spectrum optimalized for these particular perturbation modes that come from the model. Given NG simulations one could estimate the sensityvity of this approach. This is also a test of the multiply connected space hypothesis. Is that right ? What I would need is to have a full fourier space of perturbations with topology encoded in it. pozdr. Bartek

2 1

Cosmo/LicMagTematy
by Boud Roukema 13 Mar '06

13 Mar '06

Witam Andrzej, wszystkich, Andrzej Strobel asked for licencjat/magisterki themes. So i've slightly updated http://cosmo.torun.pl/cgi-bin/twiki/view/Cosmo/LicMagTematy Andrzej: below is my proposed text. pozdr boud ---------------------------------------------------------------------- Observational Cosmology Masters/Licencjat Project - General Outline Description: There are many possible projects which could be done as a master's thesis project, in using publicly available archival data from observational surveys to constrain one or more of the local or global cosmological parameters, either those related to shape (curvature, topology) or maybe also those unrelated to shape ("dark energy" or "dark matter"). The precise projects would be chosen in discussion with the masters/licencjat students. Please see http://cosmo.torun.pl/cgi-bin/twiki/view/Cosmo/CosmoProjects for projects that the cosmology group is working on and http://cosmo.torun.pl/cgi-bin/twiki/view/Cosmo/CosmoNews for ideas on the hottest topics in cosmology research - any of these would be appropriate if the student is sufficiently interested. Some examples are on http://cosmo.torun.pl/cgi-bin/twiki/view/Cosmo/LicMagTematy. General Requirements: * basic knowledge in astronomy, physics, mathematics, computing skills * desire to measure something about the shape of the Universe and/or dark matter or dark energy or other observational cosmology * willingness both to learn from and to teach others interested in observational cosmology at TCfA * willingness to learn the following practical skills: touch-typing, emacs, \LaTeX, usage of wikis and/or mailing lists for communication, GPL compatible programming * participation in the "Shape of the Universe" monograph course and/or Bronek Rudak's semester 9 "Kosmologia" course: o http://cosmo.torun.pl/cgi-bin/twiki/view/Cosmo/MonographCosmo o http://www.ncac.torun.pl/~bronek/KOS.html * Nie ma problemu jeśli student magistera lub licjencacki (jeszcze) nie dobrze mówi po angielsku, ale potrzeba znać czytać i rozumieć angielskie tekst, np na http://arXiv.org/ ----------------------------------------------------------------------

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moge byc spozniony jutro (czwartek 26.01.06) dla wykladu
by Boud Roukema 25 Jan '06

25 Jan '06

Cześć wszystkim (którzy uczestniczą w wykładzie tym semestr :) Pani z Działu Nauki w Rektoracie prosiła o poprawki (proste) do naszego wniosku o grant więc muszę rano iść przed wykładem jeszcze raz do Rektoratu... Mam nadzieje, że nie będę zapóźno, chyba z autobusem 10.00 tzn ok. 10.40 @Piwnice będzie ok. W czasie czekanie, mogłybyście tłumaczyć do sceptyków (humanistów?), że treść tu: http://pl.wikipedia.org/wiki/Kszta%C5%82t_Wszech%C5%9Bwiata jest dobra, lub to poprawić... Dyskusja jest (w zasadzie) tu: http://pl.wikipedia.org/wiki/Dyskusja:Kszta%C5%82t_Wszech%C5%9Bwiata Prośba o usunięcie strony jest tu: http://pl.wikipedia.org/wiki/Wikipedia:SDU/Kszta%C5%82t_Wszech%C5%9Bwiata Też lepiej rejestrować się (na góry, na prawo) przed edycji. do jutra boud

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ksztalt_Wszechswiata na pl.wikipedii: Strona do usuniecia!!!!!
by Boud Roukema 24 Jan '06

24 Jan '06

Witam shape-univ, Jest walka na wikipedii dotyczączy: http://pl.wikipedia.org/wiki/Kszta%C5%82t_Wszech%C5%9Bwiata Jest procedura glosowania do *usunięcia* strona!!!! http://pl.wikipedia.org/wiki/Wikipedia:SDU/Kszta%C5%82t_Wszech%C5%9Bwiata Dla głosować, musisz mieć minimum 100 edycji na pl.wikipedii - termin 31.01.2006. Dla dyskutować, nie musisz mieć żadnego ,,kredyt" edycyjnego. Wiem, że prawie wszysce jest zajęty z sesji, ale jeśli chcesz, że strona nie jest usunięta, proponuję, że uczestniczyć... Nie mówiłem tam że jestem dr.hab., bo to jest tylko ,,argument od autorytetu" zamiast argument naukowy. Dobry aspekt tego sprawy, jest, że więcej osoby w Polsce będą coś uczyć się o kosmologii... pod warunkiem, że zaangużujemy się w poprawkach... pozdr boud

1 0

mirror matter debate
by Boud Roukema 03 Jan '06

03 Jan '06

Witam shape-univ, There are a few arguments here about "mirror matter (Foot et al.)" on the wikipedia: http://en.wikipedia.org/wiki/Talk:Mirror_matter i haven't gone into them deeply, but editing this page, or the article itself, might be one way to have more confidence in understanding the issue, since any changes or comments you make may be read by anyone else with internet access... A few comments *against* the Foot interpretation are at the level of what we might call "scientists' gossip" or rough intuition. The only serious response is to understand what Foot et al. says and also try to understand the comments. pozdr boud

1 1

reading matter - nonbaryonic dark matter
by Boud Roukema 30 Nov '05

30 Nov '05

Witam wszystkim na shape-univ, Mamy ktoś nowy, który interesuje się w kosmologii :) - Łukasz zaczyna licencjat o ciemnej materii - witam Łukasz :). Dodawałem nową sekcję do twiki: http://adjani.astro.uni.torun.pl/cgi-bin/twiki/view/Cosmo/NonBaryonicDarkMa… Proszę popraw błędy, albo daj lepszy artykułow, itd. pozdr boud Review/Introduction papers on Non-Baryonic Dark Matter problem big-bang nucleosynthesis (BBN), e.g. Steigmann AstroPh:0511534 \Rightarrow \Omega_{nonbaryonic} \sim 0.25 WIMPS * AstroPh:0402045 Martin Rees - recent, quick and short * AstroPh:0506676 pages 5,6,7 Paul Frampton - recent, quantified, quick, short summary * AstroPh:0403064 Paul Gondolo - recent, in-depth introduction MACHOS * recent MACHO articles: http://arxiv.org/find/astro-ph/1/ti:+machos/0/1/0/all/0/1 * MACHO debate: are the MW microlensing events only due to known stellar populations? o Evans & Belokurov, 2004, RIP: The Macho Era (1974-2004) AstroPh:0411222 vs o Griest & Thomas 2004 Contamination in the MACHO dataset and the puzzle of LMC Microlensing AstroPh:0412443 brown dwarfs * brown dwarfs are baryonic: they cannot explain \Rightarrow \Omega_{nonbaryonic} \sim 0.25 pierwotny czarny dziury - primordial black holes * Afshordi et al. AstroPh:0302035 Primordial Black Holes as Dark Matter: The Power Spectrum and Evaporation of Early Structures

1 0

bede kilka minuty spozniony dzis
by Boud Roukema 25 Nov '05

25 Nov '05

Przepraszam, trochę zadużo spałem dziś - idę do Piwnic z autobusem o 10.00g - tzn będę wykład od ok. 10.40g. pozdr boud

1 0

CosmoPl meeting Jan/Feb 2006
by Boud Roukema 22 Nov '05

22 Nov '05

Cześć cosmo-spotka, Marek Biesiada from Katowice is interested in helping organise a small, informal 2-day cosmology meeting in Jan/Feb 2006. The main idea is to get together the different Polish cosmology people from Szczecin, Toruń, Kraków, Katowice, Lublin, Warsaw and hopefully maybe also some visitors from Czechy, Potsdam, Estonia, ... Anyway, here's the twiki page: http://cosmo.torun.pl/cgi-bin/twiki/view/Cosmo/CosmPlMeeting2006 Please join cosmo-spotka@ http://cosmo.torun.pl/mailman/listinfo/cosmo-spotka or else read the twiki page regularly if you're interested in helping organise (scientifically + locally) or participate in this meeting. Some time soon, we should send an invitation out to cosmo-pl@ - but IMHO we should keep cosmo-pl@ as a low volume list (many people are subscribed). Anyone interested in this meeting should join cosmo-spotka. pozdr boud

2 1

couple of comments on the pixelization schemes
by Bartosz Lew 10 Nov '05

10 Nov '05

Hi Boud, I've been wondering about the optimal pixelization scheme of the sphere a couple of weeks ago and since I've send to you my own implementation of the Healpix pixelization scheme written (generally) in C (according to astro-ph/0409533) but compatible with GNU c++ compiler here I'd like to comment on some comments that can be found in the source code. And since you don't like private, closed conversations I also cc this letter to shape-univ. 1) First of all healpix is not stupid :)))) - it's cool because pixels have the same area which is not always the case (e.g.. quad-cube pixelization used with COBE data), because it's hierarchical and isolatitude of course, however the first and the last features are also common in other pixelization schemes. 1.1) But also very important thing is that it is more less "equi-angular" - i.e. the angular distance from pixel to pixel is more less constant. But obviously the exact "equi-angular" solution does not exist. 2) Now the my CPEDS library for doing useful stuff - and especially the pixelization.c has more useful functions so probably I should update the version I've send to you. i.e. - conversions from RING to NESTED and vice versa - calculation of ring given pixel and vice versa (in both nested and ring orderings) - estimated pixel size (maybe not that useful) since it may be probably just as well estimated from 4PI/N_pix. 3) The main point I wanted to come up with the new idea for pixelization scheme was the thing I addressed in point 1.1. But also the following 3 drawbacks of this scheme, namely: 3.1) the pixel shape dramatically varies from pixel to pixel. this is what I didn't like because of e.g. CMB lensing studies where the morphology at small scales would be very important - but of course this can be overcome with sufficiently oversampling the pixelization by increasing the Nside parameter to meet the Nyquist conditions. 3.2) the number of pixels in a ring does NOT gradually rises with increasing \theta (in spherical system definition consistent with HEALPIX - i.e. theta = 0 at North pole). Instead it only rises in the top (bottom) part of the north (south) polar region. This is certainly unnatural thing. since all the latitudes in equatorial (roughly from 41 deg to 180-41 deg regions are represented by the same amount of pixels in longitude) !! This is not the case e.g.. in he GLESP (Gauss-Legendre) or Igloo pixelization schemes. 3.3) It has an axial symmetry (since it has a poles equator, rings, etc). And why the CMB sky should know anything about the symmetry ? In particular why should it have an axial symmetry ? So naturally the solution would evolve into direction of platonic forms like tetrahedron, cube, ... oops it ends at icosahedron. And since we need a pixelization with number of pixels something like few Mpixels the 20 pixels of icosahedron is not enough. My idea of tetrahedron based pixelization system was just driven from this point of view that there should be no preferred directions in the sky. The system would gain higher resolution by looking for directions equally separated from neighboring directions (initially defined by axis of tetrahedron). This concept fails, of course because such a solution does not exist. Max Tegmark also went in this direction inventing the icosahedron pixelization system which is the next step after the quad-cube system, but each triangle is divided in other way. Anyway, at this time I see no point of terrible importance to force the idea of the tetrahedron pixelization system so I drop this case. rather it would be interesting to implement other pixelizations systems into the isolat packet. pozdr, Bartek

3 2

wyklad 10.00g piatek 28.10.2005
by Boud Roukema 26 Oct '05

26 Oct '05

Witam, Będzie wykład monograficzny pojutro o 10.00g @KRA. pozdr boud

1 0

ksztalt wszechswiata - monograf 2005/2006 zima
by Boud Roukema 06 Oct '05

06 Oct '05

Cześć Andrzej (Strobel), Proponuję to jako kilka zdanie dotyczący monograf. pozdr boud ---------------------------------------------------------------------- Kształt Wszechświata - Shape of the Universe Monograf dotyczy kształt Wszechświata według standardowych modelu ciepłego Wielki Wybuchu (model zbieżności), tzn jego krzywizna i jego topologia, w aspektach teoretycznych i obserwacyjnych. Linki polecane: http://pl.wikipedia.org/wiki/Ksztalt_Wszechswiata This monograph deals with the shape of the Universe according to the standard hot Big Bang model (convergence model), i.e. its curvature and topology, including both theoretical and observational aspects. Recommended links: http://en.wikipedia.org/wiki/Shape_of_the_universe ----------------------------------------------------------------------

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wikipedia - ogolna uwaga - forma zapodanych definicji:)
by Bartosz Lew 14 Jun '05

14 Jun '05

wlasnie widzialem http://pl.wikipedia.org/wiki/Brakuj%B1ca_materia IMHO, definicje rzeczy umieszczana na wikipedia powinny nasladowac taka forma jaka jest przyjeta w normalnych encyklopediach. I nie powinnos sie stowowas sformuowan typu "nie wiem co by bylo" itp. ---- ------^ jesli juz czegos nie wiadomo to lepiwj uzyc "nie wiadomo" albo nie jest jasne albo cos takiego. pozdrawiam. Bartek

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egzamin ksztalt wsz'a - wyk monog - punkty na twiki
by Boud Roukema 13 Jun '05

13 Jun '05

Witam, Chyba jeszcze są osoby, którze chcą ,,egzamin" dla wykładu monograficznego Kształt Wszechświata tym semestr - wtedy proszę daj mnie - i innych - trochę czas żeby weryfikować twoje 5 punkty na twiki! Nawet jeśli inny studenci (czy pracowników) nic nie poprawiają na twoich stronach twiki, to nie znaczy, że nikt nie to czyta :). Więc warto pokazywać, że zrobiłeś coś interesujący, i pokazuje, że rozumiesz coś o kosmologii. W każdym bądź razie, Andrzej Czarny już ma jej strona przygotowa: http://adjani.astro.uni.torun.pl/cgi-bin/twiki/view/Main/AndrzejCzarny Możesz dać komentarze, poprawić - ale oczywiście, Andrzej też będzie mogł poprawić twoja strona też... :) Więc chyba warto że twoje komentarze są konstruktywne. Andrzej (Cz) - już dałem kilka komentarze. Dotyczączy twoje strony na wikipedii, uważam, że cel wikipedii nie jest tworzony wiele strony niezależny o prawie sam idei - jeśli dwa pojęcie są prawie sam, lepiej zrobić mała poprawka, czy dodawać sekcja, do istniejąca strona niż tworzyć nową. W każdym bądź razie, lepiej dyskutujemy w sposób modularnym :) - tzn że komentarze są na stronach twiki i wikipedii. pozdr boud

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0.1.17 - phase of best match (generalised from -36, 0, +36)
by Boud Roukema 16 Feb '05

16 Feb '05

Witam, http://cosmo.torun.pl/GPLdownload/dodec/circles-0.1.17.tar.gz jest przygotowy. Mo�esz u�ywa� opcja -D �eby produkowa� wykresy i wtedy najintersuj�ce s� gs s_rot_*[tf].ps Pokazuj� S i \sigma dla rozwi�zanie w astro-ph/0402608, oko�o tych 6 okr�gi, ale zamiast tylko fazy -36.0 deg, 0.0 deg i +36.0 deg, jest dla -36.0 deg + beta gdzie beta jest faza miedzy 0 i 360 deg. Je�li hypoteza jest dobra, musi by� maksimum S na 0 i minimum \sigma na 0 deg. Wydaje mi si� �e jest to prawda: maks S i min \sigma s� na 0 deg. Oczywi�cie, to nie *wystarczy* pokazywa� �e hypoteza jest dobra, ale najmniej jest to sp�jny. s_rot_stat.ps -> S s_rot_diff.ps -> \sigma BTW, tu jest program warsztatu w Pary�u - Bartek i ja b�dziemy tam. pozdr boud ----------------------------------------------------------------------------= ---------------------------------------------------------------------- Workshop "Cosmic Topology between WMAP and PLANCK : Facts and Theories" Observatoire de Paris-Meudon, CIAS 8-10 march 2005 Preliminary Program Tuesday 8 March : Topology and CMB 10.00 - J.-P. Luminet : Opening address - Cosmic topology, New Challenges 10.45 - Coffee break 11.00 - G. Starkman : Looking for the topology=20 of the universe using circles in the sky 11.45 - B. Roukema : The Poincar=E9 dodecahedral=20 manifold and matched circles in the first-year=20 WMAP ILC data 12.30 - Discussion and Lunch 14.30 - S. Lustig: CMB Anisotropy of Spherical Spaces 15.15 - A. Riazuelo : The State-of-the-Art of CMB=20 simulations in multiconnected spaces. 16.00 - Coffee Break 16.15 - F. Steiner: CMB Anisotropy of Hyperbolic Spaces 17.00 - General Discussion Wednesday 9 March. Mathematical Methods for Multiconnected Spaces. 10.00 - J. Weeks : Mathematics of Multipoles - Ideas New and Old 10.45 - Coffee break 11.00 - M. Lachieze-Rey : A few remarks on Multipole Vectors 11.45 - J . Gundermann : Eigenmodes in spherical=20 spaces, the case of S3, S3/I*, S3/T* and S3/O*. 12.30 - Discussion and Lunch 14.30 - M. Lachieze-Rey : Mathematical methods=20 for eigenmodes in spherical spaces 15.15 - S. Caillerie : Computation of eigenmodes=20 in Spherical Dodecahedral Space 16.00 - Coffee Break and Discussion Thursday 10 March. Crystallography and Other Methods. Open Discussion. 10.00 - M. Reboucas : title to come 10.45 - Coffee break 11.00 - G. Starkman : The statistical isotropy=20 of the microwave background, or is the low-l=20 microwave background really cosmic? 11.45 - B. Lew : Tests of non-gaussian features=20 of CMBR in WMAP map as hints for non trivial=20 topology 12.30 - Discussion and Lunch 14.30 - B. Roukema : Cosmic crystallography using=20 short-lived objects - active galactic nuclei 15.15 - A. Riazuelo : CMB Polarization in multiconnected spaces. 16.00 - Final Discussion ----------------------------------------------------------------------------= ----------------------------------------------------------------------

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fascist's stuff !!!! -- Your message to Shape-univ awaits moderator approval (fwd)
by Boud Roukema 14 Feb '05

14 Feb '05

Cze¶æ shape-univ, Oko³o tygodniu temu, ilo¶æ spam do shape-univ zosta³ d³u¿szy ni¿ wcze¶niej. (Byæ mo¿e kto¶ pisa³ adres listy w formacie dla spiderów, tzn z @ zamiast z " at " lub " w " lub z "ANTISPAM" lub co¶tam?) Wcze¶niej, parametry listy by³y ¿e *ktokolwiek* z mejlem w ¶wiecie mog³ wysy³aæ mejl bezpo¶rednie na listy, tylko by³oby analizowany przez spamassassin. Teraz, je¶li kto¶ wysy³a mejla od *adresa*, który nie jest zapisany na li¶cie, bêdzie traktowany jak listy od kto¶ nie zapisany, i bêdzie czekaæ dla moderatora. Konkretnie, w version 2.0.11 mailmana, opcja jest: Restrict posting privilege to list members? (member_posting_only) (Details) No Yes Teraz jest "Yes". Mogliby¶my wróciæ do "No", ale wtedy by³oby wiêcej spam (w weekendzie byli 3). Co mo¿esz zrobiæ je¶li masz rozmaity adresy, (np kto¶@astro..., kto¶@astri, kto¶(a)wp.pl, ...), jest zapisaæ siê pod wszystki adresy, http://cosmo.torun.pl/mailman/listinfo/shape-univ Subscribing to Shape-univ Subscribe to Shape-univ by filling out the following form. You will be sent email requesting confirmation, i musisz potwierdziæ, wtedy i¶æ na dolu http://cosmo.torun.pl/mailman/listinfo/shape-univ To change your subscription (set options like digest and delivery modes, get a reminder of your password, or unsubscribe from Shape-univ), either enter your subscription email address: i kliknij na "Edit options" i wtedy zrób: Disable mail delivery Turn this on if you want mail to not be delivered to you for a little while. dla ca³y (oprócz jeden) z twoich adresy. Wtedy bêdziesz otrzymaæ tylko jedna kopia ka¿da mejla na listê (inaczej bêdziesz mieæ pod ka¿dym adresie). pozdr boud > ---------- Forwarded message ---------- > Date: Mon, 14 Feb 2005 10:35:18 +0100 (MET) > From: ****** <******* at astro.uni.torun.pl> > To: Boud Roukema <boud at astro.uni.torun.pl> > Subject: fascist's stuff !!!! -- Your message to Shape-univ awaits > moderator approval (fwd) > > > why is this fascist's stuff is holding me back ? :) Cieszê siê ¿e u¿ytkowniki nie toleruj± cokolwiek cenzury od adminów ;). > ---------- Forwarded message ---------- > Date: Mon, 14 Feb 2005 10:31:01 +0100 > From: shape-univ-admin at cosmo.torun.pl > To: ******* at astro.uni.torun.pl > Subject: Your message to Shape-univ awaits moderator approval > > Your mail to 'Shape-univ' with the subject > > ************ > > Is being held until the list moderator can review it for approval. > > The reason it is being held: > > Post by non-member to a members-only list > > Either the message will get posted to the list, or you will receive > notification of the moderator's decision. >

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bleee 20th hour
by Bartosz Lew 14 Feb '05

14 Feb '05

czesc Boud. Listen if you want to move in to 36 I think I would be good idea you talk to Marek Gleba if he has some switch because there is only one inet cable so it won't do for us two. eemmm, I'm about to finish my own versio of a program that calculates circles on the sky for dodecahedron. :) I was just wandering about the correlator you used. I have 2 remarks: 1) circles of different sizes are represented by different number of pixels. so naturally bigger circles will have bigger S value that the smaller because there is just simply more terms to sum over. like T_i*T_j from 'upper' and 'lower' circle. I'm trying to use the same correlator but normalized to one pixes - i.e. I divide each S value (for each individual circle) by the number of pixels that go into it. What do you think about that ? 2) I'm a bit worried about the fact that you don't use absolue values in the \delta T_i and \delta T_j. Imagine a fluctuations aroud the circle in shape of just a linear function T(dist_along_circle=d) ~ d and indentical in the opposite circle. whaen you correlate this you get zero - that's not much. I know it's not a prove but looks a bit worrying to me,since probably some , any random fluctuations can generate S > 0, while for the perfect match we get S=0. So I indent to use abs(T_i)*abs(T_j) (except from the normalization thing). at the moment the program don't work yet - still debuging :/ pozdr. Bart

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Delivery service mail
by Shapells 02 Feb '05

02 Feb '05

WARNING: This e-mail has been altered by MIMEDefang. Following this paragraph are indications of the actual changes made. For more information about your site's MIMEDefang policy, contact Andrzej Marecki <postmaster@localhost>. For more information about MIMEDefang, see: http://www.roaringpenguin.com/mimedefang/enduser.php3 An attachment named upd02.cpl was removed from this document as it constituted a security hazard. If you require this document, please contact the sender and arrange an alternate means of receiving it.

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Re: tesing dodec
by Boud Roukema 01 Feb '05

01 Feb '05

Witam, > If you think this could be interesting to others you can reply or cc > your opinion on shape-univ. Pewnie jest to interesujący dla shape-univ! :) Daję odpowiedź chyba niedługi... pozdr boud On Sat, 29 Jan 2005, Bartosz Lew wrote: > > Czesc Boud. > > I have a new idea. > I've just compiled the healpix soft and generated a map from > previously calculated power spectrum from new cmbfast package. > > eg. see > http://adjani.astro.uni.torun.pl/~blew/praca/topology/moj-l04-08-anim.gif > or if it's too slow moj-l04-08-anim2.gif :)) > > I was just thinking about that tast of significance of the signal > you've found and what you said that this is a lot of work doesn's seem > to be right to me now. well imagine I provide you a new simulated > map. in fits format for standard LCDM WMAP model in WMAP resolution > and pixelisation scheme. you put this through you pileline for dodec just > to see > what comes out. the rms signal or peak-to-peak dispersion would define > the valid detection threshold for the real map. isn't that right ? > > it doesn't matter that the simulation is performed for simply > connected space. - even better. in fact it's similar as doing the same > thing but on the realmap but with nonphysical case of zero rotation. > > I'll try to do it tommorow on my own with your package if I'll manage > to find out how it works and compile it correctly. > > what do you think. of couser to treat this seriously I must pay more > attention to noise thing in each pixel, size of beam etc but as I > remember I read some good publication about this stuff recently so > perhaps this isn't big problem. > > the bigger problem could possibly arise when I'd like to simulate the > map for some non-trivial topology to get some strong signal in a shape > of spikes in circles correlation function, like cornish et al. did. > > If you think this could be interesting to others you can reply or cc > your opinion on shape-univ. > > bartek > >

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topology vs inflation --- back to study :)
by Bartosz Lew 23 Jan '05

23 Jan '05

hi everybody. here I present an argument which I've just come to. the basic question is: is the compact topology consistent with the inflation. my argument point out that there is a chance that the answer could be not necessarily :) well, one of the prominent predictions of the compact topology is that the power spectrum of fluctuations should have a cut off at some topological size scale since the size of the fluctuations must fit into the the finite size of the fundamental polyhedron. eg. some wavenumber k and some related with it distance - corresponding to some eigenmode of the gravitational potential must be smaller than the size of the fundamental domain. On the other hand the inflation predicts that the eigenmodes of the gravitational fluctuations are independent from scale and yield gaussian distribution. this is inconsistent with the compact topology idea, isn't it ? what do you think about it, Boud, anybody ? pozdrawiam, Bartek

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circles-0.1.13.tar.gz; projekt pauliny/cezary
by Boud Roukema 19 Jan '05

19 Jan '05

Witam, http://cosmo.torun.pl/GPLdownload/dodec/circles-0.1.13.tar.gz ma kilka poprawki od wcześniejszych wersji: - jeszcze potrzeba około 60Mb pamięci (RAM+swap?), ale jest zrobiony u C zamiast u fortran, więc raczej niż ,,naruszenie ochrony pamięci", chyba tylko będziesz mieć problem jeśli *prawdziwie* brakuje pamięci - jest przykład funkcja lib/newdat.c dla projekt Pauliny/Cezary: http://adjani.astro.uni.torun.pl/cgi-bin/twiki/view/Main/SymulacjaWMAP zobacz ChangeLog dla więcej szczególy. Ostatnie formalny wykład tej sobotę 22.01.2005r. o 11.30g jak zwykle. Oprócz Paulina i Cezary, chyba nikt nie zapisał jego punkty na twiki. Moim skromnym zdaniem, nie ma sens używać metodę punkty-na-twiki jeśli nie ma minimum czas między propozycję punkty i moment podpisy na indeks. Jak myślecie o minimum 1 miesiąc między propozycjami punkty i podpisem? Bo inaczej, jeden z najważniejszy powód pisać na twiki straci sens: nikt nie może, w praktyce, dać komentarze jeśli nie ma wystarczający czas. Do osób chętne dla próby inne metody niż twiki, zapraszam na moodle: http://planck.astro.uni.torun.pl/moodle ale uważaj, jeszcze nie jest pełnie instalowany, i jeszcze nie widzę gdzie lub czy są najważniejsze ,,narzędzie" uczenie się w tego pakietu. Być może są, tylko jeszczse nie widziałem. pozdr boud

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PKO BP i PZU Wycena i Prywaty-zacja
by Rafal Mazurkiewicz 10 Jan '05

10 Jan '05

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wyklad jutro !!! i co robiliscie ?
by Boud Roukema 07 Jan '05

07 Jan '05

Witam shape-univ zimo 2004/2005, Nie widziałem co zrobiliście na wiki!!! Metoda egzamin na wiki tylko może funkcjonować jeśli jest komunikacja ogólnie między studentami, nie tylko że osób będą indywidualnie ja pytać na ostatnio minut czy *ja* sam akceptuje ich punkty. Musi być czas żeby nie tylko ja będzie uzasadnić istotność i treści punktów, moim skromnym zdaniem. http://adjani.astro.uni.torun.pl/cgi-bin/twiki/view/Cosmo/MonographCosmo Dla osób, które zapomniali: cel jest zrobić następny krok na pytanie: ,,Czy już wiemy kształt Wszechświata lub nie?" Już circles-0.1.11.tar.gz jest przygotowy. Jest AM_MAINTAINER_MODE w configure.ac żeby instalacja na (np) sun.astri musi być spokojnie nawet że wersja automake jest różny od wersji automake że używałem dla przygotowanie pakietu. Jeśli ktoś chce używać autoconf/automake itd dla własnej wersja circles'a, na krok configure, musiałbyś zrobić ./configure --prefix=<moja_kategoria> --enable-maintainer-mode i wtedy będziesz ,,maintainer"-em. Piszucie co byli twoje pomysł, pytanie, plany, co rozumiałeś, co nie rozumiałeś, jaki błędy są w programie, itd itd.... Nikt może decydować dla siebie na pytaniach *badania* - jeśli odpowiedź już jest pewna, to nie badania, to tylko weryfikacja. do jutra boud

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8 stycznia - wyklad monog - ksztalt wszechswiata?
by Boud Roukema 06 Jan '05

06 Jan '05

Cześć Michał (Hanasz), Jak są plany dla twoje wykłady monograficzne? Czy możemy zrobić wykład kosmologiczny tej sobotę 8.I.2005r lub czy jest konflikt z MHD? I jak są plany dla 15.I i 22.I - czy możemy zrobić kosmologii też o 22.I ? pozdr boud

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PROPOZYCJA 8 + 22 stycznia 2005 - TERMIN DECYZJI 16g piat 17.XII
by Boud Roukema 15 Dec '04

15 Dec '04

Witam, Michał Hanasz proponuje że zrobimy naszy wykład monograficzny (Kształt Wszechświata): 08 stycznia 2005r. + 22 stycniad 2005r. (Jego wykład będzie 15 stycznia, jeśli zgadzamy się.) Proponuję 16g piątek jak termin decyzyjny konsensualny, tzn że jeśli nikt mówi że jest przeciwko przed 16g piątek, propozyjca jest akceptowany. Oczywiście, jeśli jest problem, najlepiej byłoby dać lepiej propozycję... pozdr boud PS: Michał i Tomek, które byli pierwszy raz przedwczoraj nie są na tej lista mejla, ani (jeszcze) na twiki, wydaje mi się. Proponuję że jeśli ktoś ma kontakt z imi, proszę pomagaj ich z komunikacji - mogą oni zapisuj się i na twiki ("Register"), i na shape-univ: http://cosmo.torun.pl/mailman/listinfo/shape-univ "Subscribing to Shape-univ"

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wykl mono jutro sob 11.XII.2004r. :)
by Boud Roukema 10 Dec '04

10 Dec '04

Przypominam: http://adjani.astro.uni.torun.pl/cgi-bin/twiki/view/Cosmo/MonographCosmo Próbuję przygotowąc pakiet ,,circles" dla jutro... Widziemy... na jutrze boud

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Cosmic crystallography revisited
by Andrzej Marecki 09 Dec '04

09 Dec '04

Dear All, I would like to point your attention to.... ----------------------------------------------------------------------------- Paper: astro-ph/0412181 Date: Wed, 8 Dec 2004 09:33:19 GMT (154kb) Title: Cosmic crystallography using short-lived objects - active galactic nuclei Authors: Andrzej Marecki (1), Boudewijn F. Roukema (1), Stanis\law Bajtlik (2) ((1) Toru\'n Centre for Astronomy, N. Copernicus University, Toru\'n, (2) N. Copernicus Astronomical Centre, Warsaw) Comments: 8 pages, 6 figures, to appear in Astronomy & Astrophysics \\ ----------------------------------------------------------------------------- This paper has got a very positive report from the A&A referee and after introducing one enhancement will be resubmitted and then very likely accepted for publication in Astronomy & Astrophysics. However, if you like to make a comment on this preprint you are very welcome! Best regards, Andrzej Marecki ----------------------------------------------------------------------------- Andrzej Marecki | Torun Centre for Astronomy | e-mail: amr(a)astro.uni.torun.pl N. Copernicus University | WWW: http://www.astro.uni.torun.pl ul. Gagarina 11 | tel: +48 56 6113032 PL-87-100 Torun, POLAND | fax: +48 56 6113009 -----------------------------------------------------------------------------

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W sprawie przesuniecia terminu wykladu
by brodzinski＠astri.uni.torun.pl 22 Nov '04

22 Nov '04

Witam! Chcialbym zapytac, czy jest mozliwosc przeniesienia najblizszego wykladu majacego sie planowo odbyc w sobote 27 listop. na inny termin np. na niedziele tydzien pozniej tj. 5.12 (nie proponuje soboty, bo tego dnia dr M.Hanasz prowadzi zajecia i by kolidowalo). Przyczyna jest taka ze 27 listop. nie moglbym uczestniczyc w wykladzie a nie chcialbym tracic zajec zwlaszcza ze razem maja byc tylko 4 spotkania na caly semestr, prosilbym wiec o zyczliwe odniesienie sie do mojej prosby. Jezeli chodzi o osoby z mojego roku to wszyscy sluchacze sie zgadzaja, pozostaje jeszcze zgoda prowadzacego wyklad dr B.Roukemy oraz pozostalych uczestnikow. Prosze o (mozliwie szybka) odpowiedz. Pozdrawiam Wojciech Brodzinski

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shape-univ monograph: 27 November + 11 December
by Boud Roukema 08 Nov '04

08 Nov '04

hi Michał, Apparently your wykład monograficzny will be 20 November and Saturday each two weeks following that. We chose Sat 27 November and Sat 11 December for our next two wykłąd monograficzny on the shape of the Universe. Are these dates OK so that our lectures do not conflict? We probably will not have a problem with the computer room - 5 students turned up Sat 6 November - but at least one student wants to participate in both lectures, so it would be best to avoid having both lectures at the same time. pozdr boud

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witam do shape-univ :)
by Boud Roukema 08 Nov '04

08 Nov '04

Witam do studentów z nowego pokolenia wykład monograficzny o kształt wszechświata :) Mamy stron twiki: http://adjani.astro.uni.torun.pl/cgi-bin/twiki/view/Cosmo/MonographCosmo (Łukasz, Andrzej, i Andrzej - proszę zróbicie ,,Register" jeśli chcecie 5 punkty dla egzamin... Wcześniej że używacie twiki i piszucie twoje cele, propozycji punkty, wcześniej inne studenci będziemy motywane. Też ja mogę łatwiejszy dać komentarze tylko jeśli jest komunikacji od was...) I też ma grupa dyskusyjna: http://cosmo.torun.pl/mailman/listinfo/shape-univ Jest to standardowa grupa mailmana. Tzn, np że osób mniej interesowane lub które mają mniej czas zagadać o kształt Wszechświata, mogą wypisać się od grupy, bez interewencji admina, albo na stron www: http://cosmo.torun.pl/mailman/listinfo/shape-univ albo chyba też jest info na dolę tej listy (np z pinem jest info dla unsubscrib-ować się). Więc nie boisz się spamował: jeśli masz meta-pytania (gdzie znaleźć więcej informacji o X, dlaczego jest błęd w artykuł Y, ...), pytaj! Też możesz weryfikować kto jest zapisany, chodź do http://cosmo.torun.pl/mailman/listinfo/shape-univ i do "visit subscriber list". If you want to practise English, of course you can write in English... pozdr boud

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sobota 6 listopada 2004r @KRA 11.30g-17.30g
by Boud Roukema 04 Nov '04

04 Nov '04

Witam, (Przepraszam dla spamowanie - proponuję że na pierszwy wykłady, wszyscy interesowany zapisuj się na listę shape-univ...) Pierwszy wykład monograficzny ,,Kształt Wszechświata" pojutrze: http://adjani.astro.uni.torun.pl/cgi-bin/twiki/view/Cosmo/MonographCosmo sobota 6 listopada 2004r @KRA 11.30g-17.30g autobus 10.45g kierunek Chełmno, przystanek 6 pozdr boud

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lecture + computer room @Fizyki Monday 12.00-14.00g please?
by Boud Roukema 22 Oct '04

22 Oct '04

Hi Andrzej (Strobel), I'm trying to find a day/time suitable for III/IV/V year students in astronomy for my monograph course - http://adjani.astro.uni.torun.pl/cgi-bin/twiki/view/Cosmo/MonographCosmo At the moment it seems that Monday 12.00-14.00g would be suitable for everyone, but it would have to be in Wydział Fizyki. Is it likely that for the first few weeks (3-4 weeks) a normal lecture room, at least with blackboard/whiteboard would be available at this time for about 10-15 students, and preferably with access to a computer projector? From about end November/first week of December, we would need access to a room with unix/linux computers, where the students can ssh to Piwnice or work locally as they wish (and install GNU GPL compatible programs :). pozdr boud PS: i tried telephoning you on x3005 but there was no answer. Email really makes communication a lot easier IMHO once people start using it.

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free lecture and computer room @Fizyki Monday 15.00-17.00g ?
by Boud Roukema 20 Oct '04

20 Oct '04

Hi Piotr, I'm trying to find a day/time suitable for III/IV/V year students in astronomy for my monograph course - http://adjani.astro.uni.torun.pl/cgi-bin/twiki/view/Cosmo/MonographCosmo At the moment it seems like Monday 15.00-17.00g would be suitable for everyone, but it would have to be in Wydział Fizyki. (Alternatively, if the IIIroku students can shift their course with J Hirsch on classical mechanics - scheduled in sala 23, 17.00-19.00g in the draft program, e.g. to 18.30-20.30 ???, http://adjani.astro.uni.torun.pl/cgi-bin/twiki/view/Cosmo/TeachingZimo20042… then all the students could come to Piwnice with the 15.30g bus and return with the 18.00 bus.) Is it likely that for the first few weeks (3-4 weeks) a normal lecture room, at least with blackboard/whiteboard would be available at this time for about 3-10 students (maybe more, but probably not), and preferably with access to a computer projector?

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Was Einstein right about dark energy after all?
by Andrzej Marecki 24 Feb '04

24 Feb '04

NEWSALERT: Monday, February 23, 2004 @ 1548 GMT --------------------------------------------------------------------- The latest news from Astronomy Now and Spaceflight Now WAS EINSTEIN RIGHT ABOUT DARK ENERGY AFTER ALL? ----------------------------------------------- The good news from NASA's Hubble Space Telescope is that Einstein was right -- maybe. A strange form of energy called "dark energy" is looking a little more like the repulsive force that Einstein theorized in an attempt to balance the universe against its own gravity. Even if Einstein turns out to be wrong, the universe's dark energy probably won't destroy the universe any sooner than about 30 billion years from now, say Hubble researchers. http://spaceflightnow.com/news/n0402/21darkenergy/

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bbn reloaded
by Bartosz Lew 13 Feb '04

13 Feb '04

"Solving the Crisis in Big-Bang Nucleosynthesis by the Radiative Decay of an Exotic Particle" Erich Holtmann1,2, Masahiro Kawasaki3, and Takeo Moroi2 1Department of Physics, University of California, Berkeley, California 94720 2Theoretical Physics Group, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720 3Institute for Cosmic Ray Research, University of Tokyo, Tokyo 188, Japan Received 6 March 1996 We discuss a new mechanism which can solve the crisis in standard big-bang nucleosynthesis. A long-lived particle X (104 sec <~ tau X <~ 106 sec) which decays into photon(s) will induce cascade photons, and destroy significant amounts of D and 3He without destroying 4He or too much 7Li. We numerically investigate this process and derive a constraint on the properties of X such that the theoretical values of the primordial light-element abundances agree with observation. We also present some candidates for the unstable particle X. Phys. Rev. Lett. 77, 3712?3715 (1996) [Issue 18 ? 28 October 1996 ] -------- well, I didn't read the whole thing but this sounds a bit discouraging. It seems that BBN mae not that "stable" as everybody belives. Maeybe there is still something missing in there, and yet all cosmo society dumb belive in so-called bbn constraint on Omega_b*h^2... maeybe in library there will be the whole thing. bart.

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None
by Bartosz Lew 07 Jan '04

07 Jan '04

ok, maeybe I messed something up ;) but the bottomline still is that UCD are very cuspy ;) but what's with their halo - something that the host galaxy was involved that's all I know here's the article astro-ph/0307362 bart. ps. if ths came to you twice - sorry for that

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dark matter constraints: Soutenance de these (fwd)
by boud 09 Dec '03

09 Dec '03

witam, Here are some hints on indirect DM searches (Bartek is specially interested in this). b > ---------- Forwarded message ---------- > Date: Tue, 9 Dec 2003 21:18:35 +0100 (MET) > From: Gianfranco Bertone <bertone(a)iap.fr> > To: users_all at iap.fr > Subject: Soutenance de these > > > Bonjour, > > vous etes cordialement invites a ma soutenance de > these, qui aura lieu le Mardi 16 Decembre 2003 a 15h, dans > l'amphitheatre de l'Institut d'Astrophysique de Paris, ainsi > qu'au pot qui suivra. > > Cordialement, > > Gf > > ******************************************************* > TITLE > High Energy Astrophysics: Indirect Detection of Dark Matter > and Propagation of Ultra-High Energy Heavy Nuclei > > ABSTRACT > We discuss the prospects of indirect detection of Dark Matter > through its annihilation radiation in the Galactic halo, under > the assumption that it is made of weakly interactive massive > particles (WIMPs) and focusing in particular on specific candidates > such as the supersymmetric neutralino, the lightest Kaluza-Klein > particle in scenarios with unified extra-dimensions, and on generic > super-heavy candidates. > > We consider three channels of the annihilation flux from the Galactic > center: synchrotron radiation, gamma-ray and neutrino flux. > Using the present observations we are able to put constraints on > the physical parameters of Dark Matter particles and distribution, > while the expected sensitivity of future experiments allows us > to discuss the prospects of observing Dark Matter candidates in the > near future. We also study the possibility of using stellar > structure arguments and helioseismic observations to constrain > the properties of \DM particles. > > In the second part we discuss the propagation of ultra-high energy > heavy nuclei in an extra-galactic magnetic field, keeping into account > all relevant energy losses. We then study numerically such process > and use the results of simulations to analyze different models for the > origin of ultra-high energy cosmic rays recently appeared in literature. > > ****************************************************** > > -- > Gianfranco BERTONE > Institut d'Astrophysique de Paris > 98bis Bd Arago 75014 Paris > Tel.: +33 (0) 1 44 32 81 90 > Fax.: +33 (0) 1 44 32 80 01 > web: http://www.iap.fr/users/bertone

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disk space for students
by Boud Roukema 04 Dec '03

04 Dec '03

Hi Krzyszek, Would you be able to provide the students (at least those in my monograph course: http://adjani.astro.uni.torun.pl/cgi-bin/twiki/view/Cosmo/MonographCosmo ) with some scratch space, e.g. on /home4/scratch which seems to have (at the moment) about 26 Gb free? E.g. 100Mb or so. By "scratch space", i mean space where it is clear that any files there will *not* be backed up, and there could either be a rule that files will be automatically deleted there at, e.g. the beginning of each month, or else just set a quota of 100Mb or whatever. The most active students' usernames are: grzenow lenka rwiatr and the others can ask later if they really want the space. thanks boud

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a new plaything for cosmology
by Bartosz Lew 25 Nov '03

25 Nov '03

enjoy :) http://adjani.astro.uni.torun.pl/~blew/praca/calc/index.html any comments, bugs-finds, etc appreciated. pozdrawiam, bart

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gas question
by Bartosz Lew 24 Nov '03

24 Nov '03

this might be a bit off topic but still interesting... Is it correct that intergalactinc gas, made of relativistic electrons, seen in X-rays by bremstrahlung rediation caused by collisions with DM particles, comes originally from galaxies, where the electrons are accelerated in galactic magnetic fields and SN explosions and then some of them escape the galactic grawitation ? bartek

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