Uros Seljak
Department of Physics and Astronomy, Stony Brook University (Stony Brook, New York, Etats-Unis d'Amérique)
Amphithéâtre Henri Mineur, Institut d'Astrophysique de Paris
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| « Galaxy clustering and weak lensing: recent developments and future prospects » |
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Uros Seljak |
| Weak lensing and galaxy clustering both hold the promise to measure the large scale structure of the universe and extract cosmological parameters, but a number of theoretical and observational uncertainties are limiting the methods and their ultimate reach. I will review the issues and discuss our current understanding of the connection between the galaxies and the dark matter clustering. Among the topics I will discuss are the galaxy biasing, shot noise, and redshift space distortions, presenting recent theoretical developments in this area. I will also discuss the likely role galaxy clustering, weak lensing and cluster abundance will play in the future surveys, and mention some of the fundamental limitations of these surveys that have not been previously accounted for. Finally, I will apply this new theoretical understanding to SDSS data and present a joint analysis of clustering and lensing that gives some of the best weak lensing based constraints to date. |
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vendredi 6 juillet 2012 - 11:00 Amphithéâtre Henri Mineur, Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |