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Sunyaev-Zeldovich Surveys as Cosmological and Galaxy Cluster Probes
  OKC colloquia

Tuesday 09 September 2014
from 13:15 to 14:30
at FA31
Speaker : Yoel Rephaeli (Tel Aviv University & UC San Diego)
Abstract : Compton scattering of the cosmic microwave background (CMB) radiation by hot gas in galaxy clusters imprints spectral and spatial signatures - the Sunyaev-Zeldovich (SZ) effect - that are uniquely valuable cosmological and astrophysical probes. Detailed SZ measurements of hundreds of clusters by ground-based (e.g., South Pole, Atacama Csomology) telescopes, and by the Planck satellite, have broadened the scope of CMB research by linking this primordial radiation field to the large scale structure of the universe at late times. I will briefly review key aspects of the use of the effect as a probe and some of the important recent observational results. The main focus of the talk will be a discussion of the need for more realistic modeling of integrated measures of clusters that are essential in the analysis of SZ (and X-ray) surveys. This will be exemplified by presenting results obtained with our extended merger-tree code for modeling the hierarchical evolution of clusters of galaxies. (host: S. Zimmer)

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