Cosmo-torun

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328 discussions

grey extinction
by Boud Roukema 27 Feb '12

27 Feb '12

Witam After this morning's seminar, here seem to be a few articles on grey extinction and the \ddot{a}/a > 0 interpretation of the SNe Ia experiments: http://arxiv.org/abs/0909.0231 Grey Milky Way Extinction from SDSS Stellar Photometry Authors: Evgeny Gorbikov, Noah Brosch http://arxiv.org/abs/astro-ph/0701259 Redshift-distance relations from type Ia supernova observations. New constraints on grey dust models Authors: A.R. Robaina, J. Cepa http://arxiv.org/abs/astro-ph/0603833 The Impact of Cosmic Dust on Supernova Cosmology Authors: Pier Stefano Corasaniti http://arxiv.org/abs/astro-ph/0505446 No evidence of "gray" dust from composite quasar spectra Authors: Chris J. Willott http://arxiv.org/abs/astro-ph/0410501 Limiting the dimming of distant type Ia supernovae Authors: Linda Ostman, Edvard Mortsell http://arxiv.org/abs/astro-ph/0306459 Extinction by grey dust in the intergalactic medium Authors: Ernst Fischer pozdr boud

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Maciej Bilicki 2MASS talk Thurs 10.00 g @CAMK
by Boud Roukema 24 Jan '12

24 Jan '12

hi cosmo-torun, i don't if everyone got this: http://www.ncac.torun.pl/?lang=pl&branch=world&id=3#najblizsze 2012-01-26 mgr Maciej Bilicki (CAMK Warszawa) Kosmologia z przeglądem 2MASS Seminaria Czwartkowe mają miejsce w kamieniczce Centrum Astronomicznego im. M. Kopernika PAN w Toruniu (ul. Rabiańska 8), w sali seminaryjnej. Rozpoczynają się o godzinie 10:15. Seminaria odbywają się w języku polskim bądź angielskim i trwają około 45 minut. Zagadnienia poruszane obejmują szeroki zakres astronomii, astrofizyki, kosmologii oraz fizyki. Z tego względu, Seminaria Czwartkowe są polecane m.in. studentom astronomii i fizyki. Kawa, herbata i pączki są serwowane o godz. 10:00. pozdr boud

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Higgs boson excluded at 2 sigma by ATLAS: arXiv:1112.2577
by Boud Roukema 13 Dec '11

13 Dec '11

hi cosmo-torun The mainstream media say that a seminar will take place this afternoon at CERN for the ATLAS and CMS groups. This seems to be the ATLAS paper. Can anyone find the CMS paper? http://arxiv.org/abs/1112.2577 Search for the Higgs boson in the H->WW(*)->lvlv decay channel in pp collisions at sqrt{s} = 7 TeV with the ATLAS detector Authors: ATLAS Collaboration (Submitted on 12 Dec 2011) Abstract: A search for the Higgs boson has been performed in the H->WW->lvlv channel (l=e/mu) with an integrated luminosity of 2.05/fb of pp collisions at sqrt{s} = 7 TeV collected with the ATLAS detector at the Large Hadron Collider. No significant excess of events over the expected background is observed and limits on the Higgs boson production cross section are derived for a Higgs boson mass in the range 110<mH<300 GeV. The observations exclude the presence of a Standard Model Higgs boson with a mass 145<mH<206 GeV at 95% confidence level. pozdr boud

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cosmic topology workshop 14-15.00 Fri 9 Dec: Zbyszek Bulinski
by Boud Roukema 09 Dec '11

09 Dec '11

witam cosmo-torun Cosmic topology workshop 14-15.00 Fri 9 Dec @KRA: Zbyszek Bulinski. Since this list is public, i won't give details of Zbyszek's topic - this work is so far unpublished ;). This is meant to be informal, interactive, it may become a practical "do stuff" workshop - we'll see. Sebastian's "young students" are visiting KRA this week and Marian apparently has a lecture/pracownia on Friday afternoon, so i don't yet know if we'll have the main seminar room or the one next to the guest rooms. Hoping to see many of the cosmology group together on Friday. :) pozdr boud

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festiwal nauki i sztuki april 2012 - deadline Mon 21 nov
by Boud Roukema 18 Nov '11

18 Nov '11

hi everyone, If anyone other than Tomek and Jan are interested, please add your name and edit and improve the proposal: http://cosmo.torun.pl/foswiki/bin/view/Cosmo/FestiwalNauki2012 pozdr boud

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NVSS velocity dipole 4 times bigger than CMB velocity dipole, but same direction
by Boud Roukema 31 Oct '11

31 Oct '11

hi cosmo-torun There's a very interesting paper by Ashok Singal from Ahmedabad: Large peculiar motion of the solar system from the dipole anisotropy in sky brightness due to distant radio sources Authors: Ashok K. Singal http://arxiv.org/abs/1110.6260 The principle and method are essentially straightforward, the data set is public and the analysis looks simple. The result is that the NVSS velocity dipole for faint radio sources is 4 times bigger than the CMB velocity dipole, but in about the same direction. My speculation is that somewhere there was a multiplication by two instead of dividing by two, but i didn't find it from a quick browse through the paper. If there is no error, then this sounds like a rather huge, large-scale bulk velocity. pozdr boud

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invisible Invisible Universe proceedings...
by Boud Roukema 21 Sep '11

21 Sep '11

hi cosmo-torun, Does someone have my physical copy of the Invisible Universe conference (UNESCO/Paris) proceedings? I seem to remember that someone borrowed it but i don't remember who. The Invisible Universe has become... invisible. :P Please let me know if you have it. pozdr boud

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Lustrzany dwunasto'scian foremny jako analogia przestrzeni dwunasto'sciennej Poincar'e
by Boud Roukema 26 Aug '11

26 Aug '11

Witam Złączany jest propozycja grupa kosmo dla visiting centre, w formacie odt i pdf. Dodawałem nazwe ludzi, którze dali konkretne pomysły i poprawki. pozdr boud

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visiting centre cosmo proposal
by Boud Roukema 24 Aug '11

24 Aug '11

hi cosmo-torun, We have just two and a half days left to propose a cosmology hands-on project for the proposed TCfA visiting centre. IMHO a mirror-lined dodecahedron is a relatively easy to construct possibility and gives visitors something of a concrete intuitive example of a multiply connected space (despite the problems in the analogy): Please update the wiki directly: http://cosmo.torun.pl/foswiki/bin/view/Cosmo/TCfAVisitingCentre pozdr boud

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admin: iuventus-plus for people <= 35 yrs old
by Boud Roukema 26 Jul '11

26 Jul '11

witam For people <= 35 yrs old, there's a funding program called "iuventus-plus": http://www.nauka.gov.pl/ministerstwo/inicjatywy-ministerstwa/programy-minis… Can someone see where the deadline for applying is? Please reply *publicly* if you do, since it's useful info for most of the young Torun cosmologists. More grant info (update if needed): http://cosmo.torun.pl/Cosmo/AdminGranty pozdr boud

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