Cosmo-torun

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328 discussions

cosmo workshop Fri 15:00 12.03.2010: Li and Liu arXiv:1003.1073: WMAP quadrupole = antenna direction interpolation error
by Boud Roukema 02 Aug '10

02 Aug '10

witam cosmo-torun Cosmo workshop WHEN: Fri 15:00 12.03.2010 WHO: boud TITLE: Liu and Li arXiv:1003.1073 ("The origin of the WMAP quadrupole") ABSTRACT: The WMAP quadrupole is apparently mostly a pointing error. The true quadrupole is much closer to zero. The missing fluctuations problem has just got much worse for the infinite-flat-universe hypothesis. Liu and Li arXiv:1003.1073 ("The origin of the WMAP quadrupole") have posted a very interesting article (presumably submitted to Nature, guessing from the style and length). The best estimate of the CMB quadrupole is apparently... zero! They claim that the WMAP quadrupole comes from a single error - an antenna direction representation error by half of an observational angular interval. The discussion concerns quaternions, but don't be frightened - it presumably uses the imaginary part only, to represent X, Y, Z directions. You can think of them as vectors in R^3 if you like. Order of magnitude check of their calculation: Liu and Li say that the error is by 7' and that this causes incorrect subtraction of the dipole in the time-ordered-date (TOD). The direction of the error varies as the direction of observation varies, so it's reasonable that it doesn't give a simple offset detectable by post-processing in the analysis pipeline, IMHO (though Bartek may have another opinion). The dipole is about 3.3mK (e.g. section 7 Bennett et al 2003). sin(7') * 3.3mK = 0.002 * 3.3mK = 6.7 microK Liu and Li say 10-20 microK, just slightly higher, but their Eq.(1) is a motivational equation - it is not used as an entry to their data analysis pipeline. Figures 1 and 2 should the effect very dramatically. Rephrasing what they've said: Figure 1 left: difference between Liu Li analysis, using the same wrong method that the WMAP team used. This is a check that their pipeline does the same thing that the WMAP team does. |Difference| < 2 or so microK. Figure 1 right: Liu Li using correct antenna directions on WMAP Q1 3yr data. They get a strong quadrupole! Figure 2 left: The effect of using a wrong dipole, calculated using *only the directional information* from the time-ordered-data from the spacecraft, with *no CMB data*. See paragraph 2, page 4: "only the spacecraft attitude information is used to compute d' ." Figure 2 right: official WMAP5 V+W quadrupole. Figures 1 right, and 2 left look very, very similar to Figure 2 right. There seems to be a slight difference in angular position visible by eye, but the coincidence is striking. Can we really believe that the CMB quadrupole just by chance happens to be very strongly aligned with and of nearly identical amplitude to a map made using only the time-ordered-data of the spacecraft direction ("attitude") and the spacecraft orbit around the Sun, and the Sun's motion with respect to the CMB? Since this is a Nature-type article, the authors are forced to exclude almost all interesting details from the article, but info like the spacecraft attitude quaternions and interpolation method should not be too difficult to find. * Bennett et al 2003: arXiv:astro-ph/0302207 http://arXiv.org/abs/astro-ph/0302207 * Liu, Li 2010: arXiv:1003.1073 http://arXiv.org/abs/1003.1073 The good thing about this is that it shows that a lot of very intelligent people - those in a mega-collaboration plus many outside of the official group - can spend 7 years looking closely at an important set of observational data without finding what appears to be a very elementary error in the analysis details, with a very fundamental consequence. The fundamental consequence is that a lower quadrupole makes Infeld's (1949) prediction of the equivalent of the low l cutoff due to the shape of the Universe even stronger! Liu & Li suggest an inflationary argument, but their interpretation is not what is important - they don't want the referee to make a fuss about interpretations, since their observational argument is so strong. pozdr boud

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cosmo wiki workshop tomorrow Fri 15.00! let's reorganise our wiki...
by Boud Roukema 01 Jul '10

01 Jul '10

hi everyone, Fri 2 July 15.00 @KRA - cosmo wiki workshop let's reorganise the wiki: http://cosmo.torun.pl/cosmo/ and the home page http://adjani.astro.uni.torun.pl Bartek has done a nice job of setting up a draft of the new KRA web pages, with a nice link to the cosmology pages. So now it's time for the rest of us (starting with me!) to help do some reorganisation. i'll start today, and i propose that we (finally) get back to our workshops by starting with a wiki workshop tomorrow. My idea is that probably i will do the "main" editing, with the pages shown in the projector, so that we can have a general discussion what should go where, while i edit. But if other people bring laptops, then they can also edit (e.g. other pages) and/or take over the use of the projector and we'll see if we can converge by using both wiki + face-to-face communication. i'll see if we can get hold of a switch (should be doable) so that if more people bring along laptops, then we can together do some reorganisation. By the nature of wiki, this means that some of the editing can be done in parallel. pozdr boud

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cosmo meetings northern summer 2010
by Boud Roukema 15 Jun '10

15 Jun '10

Witam cosmo-torun, As usual, there are many cosmo meetings in Europe this northern summer. :) This is slightly edited from two French cosmo/extragalactic mailing lists messages. pozdr boud > ---------- Forwarded message ---------- > Date: Mon, 29 Mar 2010 09:36:20 +0200 > Subject: Diffusion PNCG - mess n° 23 (fwd) > Date: Wed, 19 May 2010 18:59:46 +0200 > Subject: Diffusion PNCG - mess n° 25 1. X?me école de cosmologie 5 - 10 July 2010 in Cargese, Corsica http://www.cpt.univ-mrs.fr/~cosmo/EC2010/EcoleLuminy10.html 2. symposium ?Fundamental Frontiers of Physics" 6 to 9 July, 2010, Paris http://ffp11.gie.im 3. The 14th Paris Cosmology Colloquium 2010 - Chalonge Thursday 22, Friday 23 and Saturday 24 JULY 2010 http://chalonge.obspm.fr/colloque2010.html 4. 35th International Conference on High Energy Physics 22 - 28 July, Paris. http://www.ichep2010.fr/ 5. 8th International Conference on Identification of Dark Matter Montpellier, July 26-30th 2010. http://www.lpta.univ-montp2.fr/idm2010 6. New Directions in Modern Cosmology from 27 Sep 2010 through 1 Oct 2010 http://www.lc.leidenuniv.nl/lc/web/2010/412/info.php3?wsid=412 ----------------------------------------------------------------------- 1. X?me école de cosmologie Nous avons le plaisir de vous annoncer la tenue de la dixi?me école de cosmologie intitulée "Le fond diffus cosmologique ? haute résolution angulaire". Elle se déroulera la semaine du 5 au 10 juillet 2010 ? l'IESC (Carg?se). Avec le lancement réussi du satellite Planck, une nouvelle fen?tre d'?observation s?ouvre en cosmologie. L'objectif scientifique de cette école est de montrer comment cette nouvelle génération de données va permettre la recherche de signatures nouvelles caractérisant les mod?les d'univers primordial. Il ne s?agira pas de traiter les données de Planck, qui ne seront pas publiques ? cette époque, mais d?'explorer les avancés théoriques et phénoménologiques. On présentera la physique du fond diffus cosmologique, en insistant en particulier sur les aspects nouveaux, les plus pertinents pour la confrontation des théories aux observations. Les cours principaux seront assurés par N. Aghanim (IAS) - J.F. Cardoso (LTCI) - A.Challinor (DAMTP) - P. Creminelli (ICTP) - E. Komatsu (TCC) - J. Lesgourgues (LAPTH) - S. Prunet (IAP) - J.-P. Uzan (IAP). Ils seront enrichis par des séminaires/cours annexes, des discussions et des débats contradictoires. siteweb : http://www.cpt.univ-mrs.fr/~cosmo/EC2010/EcoleLuminy10.html NB : Le nombre de places étant limité, les intéressés sont priés de s'y inscrire au plus vite pour que l'on puisse prévoir une logistique adéquate. Les organisateurs F. Bernardeau (CEA/DSM/IPhT) - R. Triay (CPT) - F. Vernizzi (CEA/DSM/IPhT) ----------------------------------------------------------------------- 2. symposium ?Fundamental Frontiers of Physics" The 11th annual international meeting ?Fundamental Frontiers of Physics? will take place in Paris, France from 6 to 9 July, 2010. The deadline for submission of an abstract is the 15th of June and for early registration to ?Fundamental Frontiers of Physics? is the 25th of June, 2010. The Symposium develops around five themes: 1. Big Bang Cosmology / Dark Energy 2. Dark Matter/Astroparticles 3. Particle physics and Fundamental Interactions 4. From Intrication to Quantum Information and Quantum Gas 5. Epistemology, History of Physics Parallel sessions will be organized as mini-workshops consisting mostly of twenty minutes oral presentations. Scientific Committee A. Aspect, Institut d?Optique (Palaiseau) P. Binétruy, APC, Paris Diderot University E. Brezin, ENS (Paris) F. Combes, LERMA (Obs. Paris) J. Iliopoulos, ENS ( Paris) J. Kouneiher, University of Nice/IUFM and LUTH (Obs. Paris) M. Lachi?ze-Rey, APC, Paris Diderot University J. A. Madore, University of Orsay J.-J. Szczeciniarz, HPS, Paris Diderot University Please visit the website of the conference for all relevant information http://ffp11.gie.im ----------------------------------------------------------------------- 3. The 14th Paris Cosmology Colloquium 2010 Ecole Internationale d'Astrophysique Daniel Chalonge THE STANDARD MODEL OF THE UNIVERSE: THEORY AND OBSERVATIONS George Smoot Nobel Prize of Physics and Daniel Chalonge Medal Thursday 22, Friday 23 and Saturday 24 JULY 2010 at the parisian campus of Paris Observatory (HQ), in the historic Perrault building. The Conference is within the astrofundamental physics spirit of the Chalonge School, on recent observational and theoretical progress on the CMB, Inflation, astrophysical dark matter, dark ages, dark energy, and the theory of the early universe with predictive power. In summary, the aim of the meeting is to put together real cosmological data and hard theory predictive approach connected to them in the framework of the Standard Model of the Universe. Topics: Observational and theoretical progress in the CMB, astrophysical dark matter, dark energy, dark ages . Large and small scale structure formation. Inflation in connection with the CMB and LSS data, slow roll and fast roll inflation, quadrupole suppression and initial conditions, low CMB multipoles. CMB polarization. Neutrinos in cosmology. The Meeting is open to all scientists interested in the subject. All Informations about the meeting and registration to it are displayed at : http://chalonge.obspm.fr/colloque2010.html Early Registration is strongly encouraged The format of the Meeting is intended to allow easy and fruitful mutual contact and communication. Sessions last for three full days in the beautiful parisian campus of Observatoire de Paris (built on orders from Colbert and to plans by Claude Perrault from 1667 to 1672). All sessions take place in the historic Perrault building ("Bâtiment Perrault") of Observatoire de Paris HQ, under the portraits of Laplace, Le Verrier, Lalande, Arago, Delambre and Louis XIV. An exhibition will retrace the 19 years of activity of the Chalonge School and George Smoot participation to the School along these 19 years. Informations on the previous Paris Cosmology Colloquia and of the school events are available athttp://chalonge.obspm.fr (lecturers, lists of participants, lecture pdf files and photos during the Colloquia). Chalonge.Ecole(a)obspm.fr http://chalonge.obspm.fr/ ----------------------------------------------------------------------- 4. 35th International Conference on High Energy Physics La 35?me Conférence Internationale de Physique des Hautes Energies, la plus importante au monde dans cette spécialité, aura lieu cet été en France, du 22 au 28 juillet ? Paris. A noter que les astroparticules et la cosmologie y seront largement représentées dans une session dédiée et dans les exposés pléniers. Site web : http://www.ichep2010.fr/ ----------------------------------------------------------------------- ----------------------------------------------------------------------- 5. 8th International Conference on Identification of Dark Matter This is the second circular announcing the *** 8th International Conference on Identification of Dark Matter *** that will be held in Montpellier, July 26-30th 2010. We are glad to announce that we will extend abstract submission until MAY 30th 2010 Please refer to http://www.lpta.univ-montp2.fr/idm2010 for further information on travel and accommodation, registration, payments, and abstract submission. See also at the end of this email. We encourage abstract submission from graduate students and posdoctoral fellows. We would appreciate if you could bring this announcement to their attention, and diffuse it to your scientific communities and research departments. Looking forward to seeing you in Montpellier, The local organizing committee Please feel free to contact us if you have questions regarding IDM 2010 (idm2010com(a)lpta.univ-montp2.fr). ----------------------------------------------------------------------- 6. New Directions in Modern Cosmology New Directions in Modern Cosmology from 27 Sep 2010 through 1 Oct 2010 Scientific organizers: T.M. Nieuwenhuizen, ITFA, UvA, R.E. Schild, Harvard CfA F. Sylos Labini, Enrico Fermi Center, Rome R. Durrer, Univ Geneva Aim and description This workshop concentrates on the discussion of recent cosmological observations which present challenges to the standard LCDM model. These observations include: the large scale flows, the sizes and amplitude of galaxy large scale structures, the systematic effects biasing the analysis of CMB data and the lack of large-angle correlations, the anisotropy of the Hubble flow, the evolution of galaxy size, and the failure to find the sub-halo building blocks left over from the primordial fluctuation spectrum. Last and not least, it is disturbing that in the LCDM model 95% of the Universe have not been observed 'directly'. While each of these observations can be seen as an anomaly that the model would possibly explain, the bulk of them calls for a more careful analysis of the model foundations, particularly the amount and role of dark substances. From the theoretical side it is known that the role of hydrodynamics can be more important that often assumed. Moreover recently there has been a considerable theoretical effort to develop a coherent picture in General Relativity which appropriately takes into account matter inhomogeneities. By connecting and discussing different approaches and results, this workshop, aims to advance our comprehension of the large scale universe. Progress can be hoped for by combining insights from various groups of researchers studying different observational and theoretical problems. The workshop offers a unique opportunity to discuss conceptual and methodological problems of the present cosmological paradigm. Central questions are posed from observational and theoretical perspectives: - Galaxy Structures on large scales: How large are galaxy fluctuations on 100 Mpc/h scale? Do we see the predicted anti-correlations in the two-point correlation function? - Is there a systematic problem in the CMB large angle correlations? Is there true evidence for a galaxy-CMB cross correlation? - Are large scale flows at odds with LCDM predictions? - What is the role of joint effects of gravity and hydrodynamics in the theory of structure formation? - What is the role of large density inhomogeneities in General Relativity? Which effects can be observed? We of course cannot expect to obtain answers to any of those questions during this workshop but we can discover how expertise from different fields can be combined to fruitfully address them. The diversity in the background of the participants guarantees that new questions will arise and new approaches will be formulated. The central role of the workshop will be to stimulate and coordinate this interaction. http://www.lc.leidenuniv.nl/lc/web/2010/412/info.php3?wsid=412 -----------------------------------------------------------------------

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advanced summer school on computational astrophysics at Nicolaus Copernicus University, Torun, Poland, 11-25 July 2010
by Boud Roukema 08 Mar '10

08 Mar '10

witam cosmo-torun Our colleagues in the optical group have got together with some galaxy formation people and are organising a simulation workshop this northern summer (July 2010): http://supercomputing.astri.umk.pl/ Ben Moore is one of the key people doing galaxy simulational work since a long time ago. Romain Teyssier does adaptive tree code work AFAIK - his program RAMSES is here: http://irfu.cea.fr/Projets/Site_ramses/RAMSES.html It is wolne oprogramowanie, under the CECILL licence, which is GPL-compatible under section 5.3.4 of the CECILL licence: http://www.cecill.info/licences/Licence_CeCILL_V2-fr.txt i think that many of us could be interested in participating or at least listening to a few talks. i'm sure that Michal Hanasz and the doktoranci will tell us if they prefer us to formally register or not, though of course, i'm sure there wouldn't be things like registration fees for local participants. We should think of organisers' practical side of making sure that there are enough seats or computers available, etc. but i don't expect that that would be a huge problem - e.g. eduroam access for laptops should presumably be available at the Maths building. pozdr boud

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two books for library: Schilpp/Infeld (1949); Bolejko et al (2009)
by Boud Roukema 04 Mar '10

04 Mar '10

hi Karolina, Here are two books that would be useful to buy. The first one has what seems to be the first statement of the "nothing-can-be-bigger-than-the-Universe" argument in terms of density perturbations. Apparently, the first scientist(s) to state the argument were not Starobinsky (1993) and Stevens et al (1993), but rather... a Polish physicist: Leopold Infeld in 1949! The second book synthesises recent papers on the Einstein-equation exact-solution approach to what i have repeatedly said in our cosmology group several times (and Helena is working on this :). In simple words: "the simplest explanation for dark energy may be the failure to do the maths carefully enough". (1) Albert Einstein: philosopher-scientist, edited by Paul Arthur Schilpp , 1949 (republished 1970) e.g. http://searchworks.stanford.edu/view/1066168 http://www.questia.com/library/book/albert-einstein-philosopher-scientist-b… (2) Bolejko et al 2009: Title: Structures in the Universe by Exact Methods Author: Krzysztof Bolejko, Andrzej Krasinski, Charles Hellaby, Marie-Noelle Celerier ISBN: 9780521769143 http://assets.cambridge.org/assets/bookpageresult.jsf?conversationId=1165892 The first book is apparently cheap, the second one expensive. Both would be useful IMHO. pozdr boud

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(1) workshop 15.00 Fri 20.11.2009 - another way to select comoving 3-space; (2) Festiwal 2010
by Boud Roukema 21 Jan '10

21 Jan '10

witam cosmo-torun (1) Research workshop! title: Another way to select comoving 3-space speaker: boud when/where: Friday 15.00 godz. 20.11.2009 @KRA. This topic will be different to my Monday KRA seminar. My Monday talk is about stuff on ArXiv.org and already peer-reviewed. Friday is for research-under-progress presentation/discussion - that's the idea, after all. (2) We have to announce FNiS2010 (science festival) proposals by Monday 23 Nov!!! Anyone interested in us doing something together, please speak up quickly, and we can briefly discuss it on Friday face-to-face (or tomorrow Thurs @KRA). Here's my proposal for what i'd like to talk about: http://cosmo.torun.pl/Cosmo/FestiwalNauki2010 pozdr boud

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Fwd: cosmo workshop Mike Peel - SZ sky simulations 15.00 Fri 15 Jan
by Bartosz Lew 13 Jan '10

13 Jan '10

Hi all, This is just a forward of the announcement also to Mike. I thinks it's very useful for students to see what is currently going on in CMB, Sunyaev-Zeldovich, radio point sources science - how to simulate realistic maps including these effects etc. This is gonna be a workshop type talk so every questions are welcome ! -- ================================================ Bartosz Lew Nicolaus Copernicus University, Torun Centre for Astronomy, Department of Radio Astronomy tel: +48 (56) 611 3042 email:blew@astro.uni.torun.pl, www: http://cosmos.astro.uni.torun.pl/~blew

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cosmo workshop Mike Peel - SZ sky simulations 15.00 Fri 15 Jan
by Boud Roukema 13 Jan '10

13 Jan '10

Witam This week we have a guest from Jodrell Bank for our cosmo workshop :). WHAT: SZ sky simulations WHEN: 15.00 Fri 15 Jan 2010 WHERE: KRA WHO: Mike Peel pozdr boud

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14.45 godz piatek 8 stycznia 2010, Lew@KRA: CMB cold spot; Planck first light
by Boud Roukema 07 Jan '10

07 Jan '10

hi cosmo-torun Cosmo workshop tomorrow Fri 8 Jan 2010 - a cold spot talk is just what we need in this weather... :P WHEN/WHO/WHERE: 14:45-15:45 Bartek Lew KRA WHAT: A study of the galaxy redshift distribution toward the cosmic microwave background cold spot in the Corona Borealis supercluster Genova-Santos et al. 2010 http://arxiv.org/abs/0912.5167 If there's time, i'll mention (maybe just briefly, at least) the lack of low l power in the Planck First Light publicity image: http://cosmocoffee.info/viewtopic.php?t=1479 http://arxiv.org/abs/0910.5102 Cover http://arxiv.org/abs/0911.4063 Liu & Li pozdr boud

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Moriond 2010 Cosmology (fwd)
by Boud Roukema 28 Dec '09

28 Dec '09

Moriond 2010 Cosmology Dear colleague, The next Rencontres de Moriond meeting devoted to Cosmology will be organized in La Thuile (Valle d'Aosta, Italy), March 13-20, 2008. Registration is open on http://moriond.in2p3.fr/J10/ where more details can be found (including abstract submission) The main topics covered in the conference are summarized at the end of this message looking forward to welcom you in La Thuile, with our best regards, the organizing committee ------- 1. Clusters / SZ effect Cosmology with clusters Optical detection and self calibration methods X-ray clusters Hydrodynamical simulations SZ Clusters Radio galaxies clusters 2. CMB / Polarization WMAP Planck Polarization measurements 3. Reionization / Radio Numerical simulations LOFAR: foregrounds GMRT Other projects (MWA ...) 4. Dark Energy / Dark Matter SNLS BAO / SDSS Weak lensing Cluster Mass Profile 5. Dark Matter: accelerator searches Direct search at the LHC Direct search with underground detectors Indirect seraches (Fermi / Gamma-ray astronomy) 6. Theory Modified gravity Dark energy models Primordial universe / Inflation 7. Herschel Herschel Science Demonstration Phase Initial Results --

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CDMS II: 2 events, P=23%, Fig 3 looks good and Fig 5 agrees with DAMA/LIBRA
by Boud Roukema 18 Dec '09

18 Dec '09

hi cosmo-torun, http://cdms.berkeley.edu/ http://cdms.berkeley.edu/results_summary.pdf http://cdms.berkeley.edu/0912.03592v2.pdf CDMS II: 2 events, P=23%, Fig 3 looks good and Fig 5 agrees with DAMA/LIBRA. There was big blog rumour about this - the significance is still low, but the results look cool to me. :) LDM and DAMA/LIBRA/CDMS particles will probably have to co-exist. There's a bit of discussion here: http://cosmocoffee.info/viewtopic.php?t=1487 And here's an article that totally ignores DAMA/LIBRA, presumably because DAMA/LIBRA is an Italian, not USA, experiment: http://www.sciencenews.org/view/generic/id/50960/title/Experiment_detects_p… pozdr boud

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cfalib: we should get Krasinski - Inhomogeneous Cosmological Models
by Boud Roukema 07 Dec '09

07 Dec '09

Hi Karolina, Could we please put: Inhomogeneous Cosmological Models Andrzej Krasinski Cambridge University Press 1997 ISBN 978-0521481809 on our list of priority books whenever there's some budget money that needs to be spent? (Sometimes at the end of the year there is money that will be lost if it doesn't get spent.) It seems we don't have this book anywhere in the UMK library system. The Universe is certainly inhomogeneous - UMK would not exist if the Universe were perfectly homogeneous (since LSS and galaxies and planets would not exist). The question is not *if* the Universe is inhomogeneous, the question is *how important* the inhomogeneity is, i.e. to what degree assuming a perfectly homogeneous model and then adding perturbations is a good enough approximation to reality. pozdr boud

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textbook by Paddy: "Gravitation" (CUP)
by Boud Roukema 13 Nov '09

13 Nov '09

hi Cfalib, cosmo-torun, i think that Cfalib should order Paddy's new book on gravitation for our library, depending on when there's money available. Often at the end of the year there's budget money that needs to be spent, and the book doesn't seem very expensive anyway (though "c." probably means "circa" = $\sim$, which maybe means they'll increase the price if the book gets good reviews or if people pre-order it?). See the summary at GRTOC.pdf - link below. Any thoughts? pozdr boud > Gravitation: Foundations and Frontiers > T. Padmanabhan > > [To be published by Cambridge University Press, January 2010.] > > The book can be ordered from this site: > http://www.cambridge.org/uk/catalogue/catalogue.asp?isbn=9780521882231 > > DESCRIPTION: > > This is a comprehensive advanced level textbook on Gravitation. The front > matter (table of contents etc.) is available as a pdf file here: > > http://www.iucaa.ernet.in/~paddy/books/GRTOC.pdf > > Covering all aspects of gravitation in a contemporary style, this advanced > textbook is ideal for graduate students and researchers in all areas of > theoretical physics. The 'Foundation' section develops the formalism in six > chapters, and uses it in the next four chapters to discuss four key > applications - spherical spacetimes, black holes, gravitational waves and > cosmology. The six chapters in the 'Frontier' section describe cosmological > perturbation theory, quantum fields in curved spacetime, and the Hamiltonian > structure of general relativity, among several other advanced topics, some of > which are covered in-depth for the first time in a textbook. The modular > structure of the book allows different sections to be combined to suit a > variety of courses. Over 200 exercises are included to test and develop the > reader's understanding. There are also over 30 projects, which help readers > make the transition from the book to their own original research. > > HIGHLIGHTS: > > * Develops the formalism and uses it to discuss four key applications - > spherical spacetimes, black holes, gravitational waves and cosmology. > > * Describes several advanced topics, some of which are covered in-depth for the > first time in a textbook. > > * Different sections can be easily combined to meet the needs of a variety of > courses.

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workshop next week Fri 20.11.2009
by Boud Roukema 12 Nov '09

12 Nov '09

hi all, i forgot to announce a research workshop yesterday (2 days before Friday), so IMHO the best is to wait till Fri next week. i'll do my best to announce something by Wednesday... Any volunteers? Please volunteer directly on the list :) or at least tell me by another method. pozdr boud

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PROPOSAL: cosmo coffee workshop Fri 13:00 26.09.2009 - conference inspirations
by Boud Roukema 29 Oct '09

29 Oct '09

hi everyone, i propose one cosmo coffee research-level workshop before the semester starts: 13:00 Fri 26.09.2009 @KRA Unless there are other volunteers, i propose that we have a loose discussion based on what people find interesting from these online conference notes: http://cosmo.torun.pl/Cosmo/InvisibleUniverse2009 (done) http://cosmo.torun.pl/Cosmo/GrassmannCosmoFun2009 (to do next week) Bartek, Agnieszka, Zbyszek - if you take laptops to GrassCosmoFun or otherwise have web access during the meeting, then feel free to add to these notes. Having multiple wiki-edits of notes on a talk while it takes place could be particularly interesting... pozdr boud

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Invisible Universe meeting - random notes
by Boud Roukema 01 Jul '09

01 Jul '09

hi cosmo-torun, i'm making some notes during some of the talks at the Invisible Universe meeting. See http://cosmo.torun.pl/Cosmo/InvisibleUniverse2009 and use arXiv.org to find the related papers! pozdr boud

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some notes after today's talk - LDM
by Boud Roukema 22 May '09

22 May '09

witam cosmo-torun * circular polarisation from synchrotron processes? Kennett & Melrose, 1998, PASA, 15, 211 http://www.atnf.csiro.au/pasa/15_2/kennett/paper/node3.html > In some sources it may be that the relativistic > particles are electron-positron pairs (e.g., Wilson & > Weiler 1997). Electrons and positrons contribute with > the same sign to the linearly polarized component and > with the opposite sign to the circularly polarized > component. If the distributions of electrons and > positrons are the same the wave modes can have no > circular component and, more importantly, the intrinsic > circular polarization from the synchrotron radiation > sums to zero. So if we have different distributions of electrons and positrons, then we get a circular polarisation component. i'm sure there must be more basic texts on this subject... pozdr boud

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non-baryonic dark matter now detected at 8.2 sigma: DAMA/NaI + DAMA/LIBRA - Bernabei et al. ArXiv:0804.2741
by Boud Roukema 20 May '09

20 May '09

witam cosmo-torun, The DAMA detections of nbDM seem to be getting even stronger! Bernabei et al. ArXiv:0804.2741 now have their annual modulation signal of non-baryonic dark matter from the Galactic DM Halo detected "at 8.2 sigma CL": DAMA/NaI + DAMA/LIBRA. Figures 2, 4 and 8 are especially impressive. Savage et al. have a nice article ArXiv:0808.3607 showing the regions of parameter space for WIMPS for which are consistent with both the DAMA detection and all the non-detections in other experiments. E.g. spin-dependent, proton-only couplings for a particle mass of about 5-9 GeV are one region compatible with all the data. This doesn't stop LDM (light dark matter) *also* being a correct hypothesis for nbDM - multiple DM particles may contribute together to non-baryonic DM. pozdr boud

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cosmo talk = ? Fri 10 april && DE as a continuity condition Fri 17 April
by Boud Roukema 17 Apr '09

17 Apr '09

hi cosmo-torun, i haven't seen an announcement for a talk tomorrow (Fri 10 April), will there be one? Anyway, i propose for 16.00 Fri 17 April: Dark Energy as a spatial continuity condition (arXiv:0904.0975) Moze byc? pozdr boud

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dark energy from continuity, finiteness and homogeneity (nothing exotic)
by Boud Roukema 07 Apr '09

07 Apr '09

witam wszystkim na cosmo-torun, If space is flat and compact, then dark energy does not require any exotic explanation, it's just a stretching effect required by the assumptions of homogeneity and continuity. http://arxiv.org/abs/0904.0975 Geometry rather than exotic particle physics or modifications of gravity. Enjoy. :) pozdr boud

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Diffusion PNCG, mess. n° 6 (fwd)
by Boud Roukema 27 Mar '09

27 Mar '09

hi all some interesting announcements pozdr boud > > ---------- Forwarded message ---------- > Date: Thu, 26 Mar 2009 16:46:49 +0100 > From: Programme National de Cosmologie et Galaxies <pncg iap.fr> > To: Programme National de Cosmologie et Galaxies <pncg iap.fr> > Subject: Diffusion PNCG, mess. n° 6 > > PNCG - Message n° 6 - 26 mars 2009 > > 1. Oxford Physics Department 2 Jobs Advert > > 2. NAM/JENAM 2009 : Epoch of Reionisation Session > > 3. Blois 2009 > > 4. Santa Fe Cosmology Summer Workshop for 2009 > > 5. Summer School in Statistics for Astronomers, June 1-6, 2009 > > ----------------------------------------------------------------------- > 1. Oxford Physics Department 2 Jobs Advert > > Please visit http://www.physics.ox.ac.uk/jobs/ to view this. > > *1* Vacancy Title: Post-doctoral Researchers in OBSERVATIONAL COSMOLOGY > within Astrophysics > > Reference Number: DB09005 > > Job Description: The Department of Physics invites applications for one > or more post-doctoral positions in observational cosmology. > > The observational cosmology programme at Oxford includes: the analysis > of surveys for type Ia supernovae; analysis of large-area surveys of > weak gravitational lensing incorporating photometric redshift estimation; > and the design and implementation of upcoming redshift surveys to measure > baryonic oscillations. We especially welcome applications from candidates > interested in working on any of these projects. > > The post-holder will have the opportunity to engage in teaching for up > to 3 hours per week during term. The starting salary is from £28,839 > to £38,757 pa depending on skills and experience. A benefits package > and a research budget for travel and other expenses will be provided. > Appointments will be for two years in the first instance, extendable > to three years. Appointments would start on 1 May 2009 or later. > > Further particulars are available from > http://www.physics.ox.ac.uk/astro/jobs/ > Applicants should send a statement of research interests, > curriculum vitae, list of publications (one file only in pdf), > and the names and addresses of three referees by the closing date > of 31 March 2009, quoting reference DB09005. Email submission is > preferred. Please ensure that the reference number DB09005 is > included in the subject title. In addition candidates should arrange > for letters from the referees to be sent to sec astro.ox.ac.uk by the > closing date. Interviews are expected to be held shortly after. > > > The University is an equal opportunity employer > > > Anyone who thinks they may be interested in the job is encouraged > to talk to Vanessa Ferraro-Wood (or email: sec astro.ox.ac.yuk) about it. > > The application deadline is 31/03/2009 > > > *2* Vacancy Title: Postdoctoral Researcher in Theoretical Cosmology > (Fixed Term) within Astrophysics > > Reference Number: DB09006 > > Job Description: We invite applications for a postdoctoral research > position starting 1 October, 2009 to work in the area of Theoretical > Cosmology for one year in the first instance, with the possibility of > extending to 3 years. There will be a particular focus on cosmic > microwave background anisotropy and interpretation of data from the > Atacama Cosmology Telescope and the Planck satellite. The successful > candidate is likely to have experience in analysis of cosmological data > and be capable of initiating research in a lively group with significant > interaction between theory and observation. The candidate will work > primarily with Joanna Dunkley, but will be encouraged to interact with > other faculty members and to carry out independent research. > > Oxford Astrophysics offers a stimulating research environment, with a > large number of faculty in cosmology, including theoretical (Pedro > Ferreira, Joe Silk, Adrianne Slyz), observational (Richard Ellis, Steve > Rawlings, Isobel Hook, Lance Miller) and experimental (Mike Jones, > Ghassan Yassin, Gavin Dalton). > > > Anyone who thinks they may be interested in the job is encouraged to > talk to Dr Joanna Dunkley (or email: j.dunkley1 physics.ox.ac.uk) about > it. > > > The application deadline is 31/03/2009 > > > ----------------------------------------------------------------------- > 2. NAM/JENAM 2009 : Epoch of Reionisation Session > > As part of the 2009 UK National Astronomy Meeting & the Joint European > National Astronomy Meeting at the University of Hertfordshire > (www.jenam2009.eu), there will be a parallel session on > > "Epoch of reionisation: > first light to the earliest galaxies currently known" > > on Monday 20th April 2009. > Please see www.jenam2009.eu/default.asp?ContentID=1327 > for more information. > > We would welcome submission of abstracts for this session by the > deadline on Monday March 9th. > > Registration and abstract submission is available at > www.jenam2009.eu/cmsapps/jenam_conference_reg/ > confreg2.asp?userid=0&confid=4&contentid=1329 > > ----------------------------------------------------------------------- > 3. Blois 2009 > > The XXIth Rencontres de Blois entitled "Windows on the Universe" > will be held from June 21st to June 26th, 2009 > in the Château de Blois, Loire Valley, France. > > This series, started in 1989 with the celebration of the > 25th anniversary of the discovery of CP violation, is a > high level cross disciplinary conference series which is > organized every year in May or June in the beautiful > Renaissance castle of Blois. > > This year will be the 20th anniversary of this series of > conferences; moreover, 2009 has also been tagged as the > "World year of astronomy". > To celebrate these two events, 7 Nobel laureates : J.Cronin, > R. Giacconi, D. Gross, M. Perl, G. Smoot, J. Steinberger, > J. Taylor and many other well known scientists have accepted > our invitation to attend and give a lecture. > > Registration and abstract submission for parallel session talks > are open at http://blois.in2p3.fr > > ----------------------------------------------------------------------- > 4. Santa Fe Cosmology Summer Workshop for 2009 > > The next of our continuing series of Santa Fe Cosmology Summer workshops > will be held in Santa Fe, New Mexico from July 6 to July 24, 2009. > The workshop series is sponsored by Los Alamos National Laboratory and > by the Kavli Institute for Cosmological Physics at the University of > Chicago. The venue is the campus of St. John's College, a small liberal > arts college that provides both a pleasant ambiance and convenient access > to Santa Fe. > > The aim of the Santa Fe workshops is to bring together physicists and > astrophysicists with interests in structure formation, the cosmic > microwave background, and the early universe. Typically, a large > portion of the time is devoted to discussion, with formal or informal > talks as needed to introduce such discussion. Attendance is limited > to about 80 participants to encourage this informality. We also > encourage attendance by a number of graduate students and junior > researchers, so they can be exposed to forefront research and interact > with leaders in the field. We therefore ask you to bring this meeting > to the attention of exceptional students and postdocs. > > This year, the first two weeks will follow our standard workshop > format, while the third week will be a focused workshop on weak > lensing. Details on third week activities will be available shortly. > > There will be no registration fee and highly subsidized housing will > be provided (the precise cost estimates will be available soon, but > are typically $150/week, less for students). Travel support will not > be available. > > To register for the meeting and to make suggestions for the scientific > program, go to the Workshop website at > > http://www.lanl.gov/projects/cosmology/sf09/ > > We will be filling spaces on a rolling basis, so you are strongly > advised to register as soon as possible, and preference will be given > to those who register before April 08, 2009. > > ----------------------------------------------------------------------- > 5. Summer School in Statistics for Astronomers, June 1-6, 2009 > > First Announcement > > Summer School in Statistics for Astronomers V > June 1-6, 2009 > Penn State University > http://astrostatistics.psu.edu/su09/ > > The fifth annual Penn State Summer School in Statistics for > Astronomers will be held at Penn State. This is a 6-day course > in fundamental statistical inference designed to provide > physical scientists, particularly young researchers in astronomy, > with a strong conceptual foundation in modern statistics and to > develop a repertoire of well-established techniques applicable > to observational astronomy. Classroom instruction is interspersed > with hands-on analysis of astronomical data using the public-domain > R software package. The course is taught by a team of statistics > and astronomy professors with opportunity for discussion of > methodological issues. > > Statistical techniques covered include: > > * exploratory data analysis > * hypothesis testing and parameter estimation > * regression & confidence interval estimation > * model selection & goodness-of-fit > * maximum likelihood methods & Bayes' Theorem > * non-parametric methods > * Monte Carlo methods > * Poisson processes > * time series analysis > > INTERESTED PARTICIPANTS SHOULD REGISTER AT > http://astrostatistics.psu.edu/su09/reg.html > REGISTRATION DEADLINE: May 1, 2009 > (or when the enrollment limit reaches) > REGISTRATION FEE: $250. > > The 2009 Summer School is organized by Penn State University's > Center for Astrostatistics. It will be modeled on the last four Penn > State Summer Schools and the 2008 Indian Institute of Astrophysics- > Penn State Summer School. See http://astrostatistics.psu.edu/ > for past lecture notes. This Web site > http://astrostatistics.psu.edu/su09/ > also gives information on travel, lodging, and visas. >

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cosmo workshop wt 14:00 20.01.09 B Lew: 'A high significance foreground non-Gaussian signal ?'
by Boud Roukema 25 Feb '09

25 Feb '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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200-bit precision floating point arithmetic and trigonometry?
by Boud Roukema 03 Feb '09

03 Feb '09

hi cosmo-torun, This follows from a conversation some of us had recently. Debian stable (etch) includes GMP and MPFR - i ran a test program which quite nicely does e.g. 200-bit floating point operations, including trig functions, and gets reasonable answers. :) Source + doc: http://gmplib.org/ http://www.mpfr.org/ These are both under the LGPL instead of the GPL, so it turns out that... the non-free program Mathematica uses the free program GMP ! So apparently non-free software libraries are not good enough for Mathematica for this purpose. Or Mathematica is just "abusing the commons". [the commons: http://en.wikipedia.org/wiki/The_commons ] pozdr boud On Wed, 14 Jan 2009, Bartosz Lew wrote: >>> But within standard types long double is better than double etc. >> >> i assume this means you've experimented with this? Based on the >> wikipedia entries, i suggested to Zbyszek that this could be >> interesting, but i haven't tried it. My understanding is that it >> pushes to the limit of the machine you're using, which can be better >> than 64bit, but is nowhere near 128bit. :) > > mmm, don't remember which means that probably not much. > > But, I never experienced a need for such extremely super-duper high accuracy. > As far as the calculation is actually correct within the given precision it's cool. > Eg. CMBFast works in 4byte float numbers and it's sufficient. > AFAIK people still very often use 4byte floats. > My opinion is that is the code returns wrong numbers its an indication that it should be rewritten > in smarter way rather than going to long doubles or quadruple precisions. > >> >> Tomorrow Thursday i've got linux@IF so i'm very unlikely to be at >> KRA. But that's not an argument against both of you coming here and >> doing stuff. :) > > ok. > > B. >

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Diffusion PNCG, mess. No 3 (fwd)
by Boud Roukema 30 Jan '09

30 Jan '09

witam some of these may be interesting pozdr boud ---------- Forwarded message ---------- > Date: Fri, 30 Jan 2009 16:03:39 +0100 > From: Programme National de Cosmologie et Galaxies pncg iap fr > To: Programme National de Cosmologie et Galaxies pncg iap fr > Subject: Diffusion PNCG, mess. n° 3 PNCG - Message n°3 - 30 janvier 2009 1. postdoc position at LPNHE 2. Invisible Universe International Conference 3. POSTDOCTORAL FELLOWSHIP in instrumentation at the Institut d'Astrophysique Spatiale d'Orsay (IAS) 4. Journées asa/alma (6 et 7 avril 2009 à Grenoble) : dernière annonce 5. Post-doctoral fellowship at LAM (Marseille-France) on Herschel Extragactic Key Projects ----------------------------------------------------------------------- 1. postdoc position at LPNHE The Laboratoire de Physique Nucleaire et des Hautes Energies de Paris (LPNHE, CNRS/IN2P3 and University of Paris) invites applications for a post-doctoral position in Observational Cosmology. The position is for 2 years starting on October 1st 2009, or earlier, with a possible extension of 1 year, contingent on funding. The researcher will work within the Supernova & Cosmology group of LPNHE (http://supernovae.in2p3.fr) primarily on the measurement of Dark Energy using Type Ia supernovae. The work will focus on analyzing the high-quality supernova data sets recently obtained by the Supernova Legacy Survey and the Nearby Supernova Factory projects, in which the LPNHE group is strongly involved, as well as on the combination of these data sets with other large supernova data sets such as obtained by the SDSS-II. The candidate is expected to have a PhD in Physics or Astrophysics and expertise in data analysis (not necessary supernova cosmology) and interpretation. Applications (CV, research statement and names of 3 referees) should be sent by email to Reynald Pain (reynald.pain lpnhe in2p3 fr). Applicants should also arrange for up to three letters of reference to be sent to the same address. The closing date is February 15, 2009. ----------------------------------------------------------------------- 2. Invisible Universe International Conference The LUTh (« Universe and Theory Laboratory » - CNRS UMR 8102, Paris Observatory), in collaboration with UNESCO and several national and international institutes organizes the « Invisible Universe International Conference » in Paris (France) from June 29 to July 3, 2009 at the Palais de l?UNESCO. The conference intends to bring together all scientists working on the various aspects of dark energy, dark matter and gravity modification and their connection to cosmological observations and fundamental physics. The list of invited speakers is completed: L. Amendola (Italy), A. Ashtekar (USA), L. Bergstrom (Sweden), Ed. Bertschinger (USA), P. Binetruy* (France), F. Combes (France), A. Connes (France), Ed. Copeland (UK), G. Dvali (Switzerland), P. Fayet (France), D. Gross (USA), F. Hammer (France), S. Katsanevas (France), E. Kolb (USA), O. Le Fevre (France), Y. Mellier (France), M. Milgrom (Israel), T. Padmanabhan (India), J. Peebles (USA), J.-L. Puget (France), A. Riess (USA), G. Smoot (USA). L. Susskind (USA), E. Wright (USA). 8 parallel sessions are organized as an international workshop such that every oral presentation is expected to be about twenty-five minutes. 1) Observational Astrophysical Aspect of dark energy and dark matter 2) Experimental particle physics aspects of dark matter 3) Gravitation and cosmology 4) Inhomogeneous universe models and backreaction 5) Dark energy as a new energy component 6) Dark matter candidates 7) Dark Matter and Dark energy as modified gravity 8) Theoretical and numerical aspects of cosmic structures and evolution THE REGISTRATIONS ARE NOW OPEN, THE CONTRIBUTED TALKS ARE WELCOME. We would be very grateful if you can also disseminate widely the information among your colleagues and students. For further information, please see the following web and e-mail adresses : http://universe2009.obspm.fr meeting.univ2009 obspm fr ----------------------------------------------------------------------- 3. POSTDOCTORAL FELLOWSHIP in instrumentation at the Institut d'Astrophysique Spatiale d'Orsay (IAS) A new generation of scintillating bolometers for EURECA Contact: Pierre de Marcillac (marcillac ias u-psud fr) STAP team (Thermal Spectroscopy for Physics and Astrophysics) Deadline for application: february 23th 2009. Job starts: at a date to be defined with the candidate (typically september or october 2009, but with some flexibility between june and december 2009). Funding is available for 2 years (*) Research topic: EURECA is a European project, still in a design study phase, dedicated to the direct detection of dark matter particles (neutralinos) with cryogenic detectors underground (see http://www.eureca.ox.ac.uk/). Cross sections of neutralino candidates with nucleons in the targets as low as 10-10pbarn are foreseen -hence two orders of magnitude better than the best actual achievements- implying close to one ton of detectors. While EURECA design will be strongly influenced by the results of the two big european underground experiments CRESST and EDELWEISS, the project also incorporates experienced teams involved in the direct dark matter detection with bolometers or with very low radioactivity techniques at a research and development phase. The IAS team is just one of them, improving since 1994 the so-called scintillating bolometer technique and applying it to different targets. Scintillating bolometers cooled at temperature lower than 20mK are planned to be used within EURECA, for their ability to explore the huge uncertainties encountered in the constitution of the neutralino itself, while being able to susbstract efficiently in a single experiment all the systematics associated with an experiment dealing with very rare events. The massive detectors built by the IAS team since 1994 proved to be able to reject most of the radioactive background during tests performed either at IAS at sea level, or underground within the EDELWEISS or ROSEBUD experiments. Though, improvements are needed in view of the EURECA project: a simpler construction design, making more easy a future serial production of detectors, has to be looked for. Configurations similar to already existing ones (as the ones used by the EDELWEISS collaboration,...) could be explorated. much less radioactive Ge-NTD sensors, -our common thermistors- with respect to the existing ones are highly desirable. At low energy, where the expected signals is high, there is confusion with noise. Time constants criteria are no longer useful to distinguish among the non-ionizing events between the good events (recoiling nuclei) and the bad ones, decays in the Ge-NTD sensors, these latter being usually faster. At high energy, such decays could also be highly confusing at slow (some hundred of Hz) sampling rates, which are the ones used today in EDELWEISS and probably later by EURECA. It is hoped that, going from much purer germanium material as initial material, we should avoid unwanted radioactive impurities in the sensors. Such activated "impurities" are normally produced after exposure in the nuclear reactor used to transmuted part of the raw material (Ge) into the desirable doping elements. fast neutron detectors, a solution to measure the rarest fast neutrons remaining inside the dark matter experiments shieldings will help a lot in estimating their contribution to the observed rate of recoiling nuclei in the detectors. Fast neutrons, through their elastic scattering, are the ultimate background in experiments dealing with direct detection, but as well in other experiments looking for very rare events: a consequence of their strong penetration power. Simulations of shielding efficiencies are the normal tools used to estimate such a contribution, but we think that one should try also to measure this important contribution by in situ measurements when dealing with very low event rates. It was proposed recently to use the neutron capture reaction by 6Li in lithiated detectors (as massive 6LiF bolometers) to measure in a straightforward way the energy of fast neutrons in the 10keV-10MeV range. The post-doctoral fellow will work preferentially on these three topics at IAS, in collaboration with teams at CEA-IRFU-SEDI or at CNRS-CSNSM working within the EDELWEISS collaboration. Selection criteria: The succesfull candidate is expected - to hold a relevant PhD (in physics, astrophysics or astroparticle physics). - to be able to demonstrate the capacity to carry out independent high quality research in a related area. - to have experience in instrumentation at very low temperature with massive bolometers (particle detection) Preferences will be given to candidates hosted by the institutions participating in the EURECA project. Salary: The annual gross salary will be of 25 600 euros (2130 euros per month). How to apply: Send a CV, a complete list of publications, and a statement of research interests to Pierre de Marcillac (marcillac ias u-psud fr) (deadline, february 23th), and arrange to have letter(s) of recommendation sent by the same date. Electronic applications can be sent in pdf, ps, or word format. (*) This grant has been made available thanks to the the P2I (Physique des 2 Infinis) networking structure, joining research institutions within the Paris & Ile de France region (see http://events.lal.in2p3.fr/P2I/) ----------------------------------------------------------------------- 4. Journées asa/alma (6 et 7 avril 2009 à Grenoble): dernière annonce L'Action Spécifique ALMA organise à Grenoble deux jours de travail (les lundi et mardi 6 et 7 avril 2009) au cours desquels la communauté discutera de la manière dont elle souhaite s'organiser autour d'ALMA. Toutes les informations sont à jour (avec une première ébauche du programme) à l'adresse suivante : http://www.graal.univ-montp2.fr/hosted/alma/ALMA2009.html Ces journées permettront 1) de recenser les équipes qui préparent déjà scientifiquement ALMA et 2) de faire dialoguer les radio-astronomes avec ou sans expertise en interférométrie avec des observateurs venant d'autres domaines de longueur d'onde, des modélisateurs, des fournisseurs de données micro-physiques nécessaires à l'analyse des données, etc... Attention : les dates de clôture des inscriptions et de l'appel à contribution ont été changées. Elles sont maintenant toutes les deux fixées au vendredi 13 février 2009 au soir. ----------------------------------------------------------------------- 5. Post-doctoral fellowship at LAM (Marseille-France) on Herschel Extragactic Key Projects Applications are invited for a Postdoctoral Research Fellow position with Dr. A. Boselli and Pr. V. Buat within the team "Physique des Galaxies" at Laboratoire d'Astrophysique de Marseille to work on the Key Insights of Herschel Guaranted Time Key Projects devoted to extragalactic astronomy. The successful applicant will be involved with the reduction and analysis of photometric data obtained with the PACS and SPIRE instruments. The successful applicant will be able to work on one of the following Herschel Guaranted Time Key Projects: the Herschel Reference Sample (HRS) and the Herschel Multi-tiered Extragalactic Survey (HerMES). HRS consists of a far-IR survey (250, 360, 520 microns) of a complete, K band selected, volume limited sample of 323 galaxies in the nearby universe. Combined with data at other wavelengths (from UV to radio centimetric) this sample will be used to study the physical properties of the interstellar medium (dust, gas, radiation field...) of galaxies spanning a large range in morphological type and luminosity with the aim of understanding the star formation process and the matter cycle in galaxies. HerMES consists of a large set of fields observed in several photometric bands from 70 to 550 microns with Herschel SPIRE and PACS with an unprecedented depth and spatial coverage. These data combined with ancillary surveys will give the first complete view on the evolution of galaxies over cosmological time giving access to the entire star formation occuring in the universe. The specific interest of our team will be to study the evolution of dust attenuation and star formation activity with redshift through the fitting of spectral energy distributions. Research experience in extragalactic studies with an emphasis on star-forming galaxies and infrared emission is desired. Experience with the reduction and photometric measurement of space-based data will be appreciated. Candidates should have obtained, by the starting date, a Ph.D. in Astronomy, Physics, Astrophysics, or equivalent. The appointment is for one year possibly renewable starting on September 1, 2009. To apply, please send resume, publication list, and statement of research to the address below and have three letters of reference forwarded to the same address. The deadline for applications is May 1, 2009. for informal inquiries:veronique.buat oamp fr, alessandro.boselli oamp fr

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Grassmannian Conference in Fundamental Cosmology Szczecin 14-19.09.09 (fwd)
by Boud Roukema 16 Jan '09

16 Jan '09

---------- Forwarded message ---------- > Date: Fri, 16 Jan 2009 12:00:56 +0100 (CET) > From: Mariusz Dabrowski mpdabfz wmf.univ.szczecin.pl > To: Boud Roukema: ; > Subject: Grassmannian Conference in Fundamental Cosmology Szczecin 14-19.09.09 Szanowni Panstwo, Pragne przypomniec, ze w dniach 14-19.09.2009 Szczecinska Grupa Kosmologiczna organizuje konferencje Grasscosmofun'09 (Grassmannian conference in Fundamental Cosmology). Informacje na temat konferencji znajduja sie na stronie: http://cosmo.fiz.univ.szczecin.pl Zapraszamy zainteresowanych czlonkow sieci do udzialu. Rejestracja odbywa sie online. W imieniu Komitetu Organizacyjnego, Mariusz P. Dabrowski Instytut Fizyki Uniwersytet Szczecinski

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