Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-02-18
Mon.Not.Roy.Astron.Soc. 352 (2004) 993
Astronomy and Astrophysics
Astrophysics
12 pages. 11 plots. MNRAS submitted
Scientific paper
10.1111/j.1365-2966.2004.07989.x
Sunyaev-Zeldovich (SZ) effect from a cosmological distribution of clusters carry information on the underlying cosmology as well as the cluster gas physics. In order to study either cosmology or clusters one needs to break the degeneracies between the two. We present a toy model showing how complementary informations from SZ power spectrum and the SZ flux counts, both obtained from upcoming SZ cluster surveys, can be used to mitigate the strong cosmological influence (especially that of sigma_8) on the SZ fluctuations. Once the strong dependence of the cluster SZ power spectrum on sigma_8 is diluted, the cluster power spectrum can be used as a tool in studying cluster gas structure and evolution. The method relies on the ability to write the Poisson contribution to the SZ power spectrum in terms the observed SZ flux counts. We test the toy model by applying the idea to simulations of SZ surveys.
Diego Jose Maria
Majumdar Subhabrata
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