HAL : in2p3-00022118, version 1

arXiv : astro-ph/0302567

DOI : 10.1051/0004-6361:20031294

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Astronomy and Astrophysics 410 (2003) 767-776

On the angular correlation function of SZ clusters: - Extracting cosmological information from a 2D catalog

S. Mei1, J.G. Bartlett2

(2003)

We discuss the angular correlation function of Sunyaev-Zel'dovich (SZ)-detected galaxy clusters as a cosmological probe. As a projection of the real-space cluster correlation function, the angular function samples the underlying SZ catalog redshift distribution. It offers a way to study cosmology and cluster evolution directly with the two-dimensional catalog, even before extensive follow-up observations, thereby facilitating the immediate scientific return from SZ surveys. As a simple illustration of the information content of the angular function, we examine its dependence on the parameter pair Om_m, sigma_8 in flat cosmologies. We discuss sources of modeling uncertainty and consider application to the future Planck SZ catalog, showing how these two parameters and the normalization of the SZ flux-mass relation can be simultaneously found when the local X-ray cluster abundance constraint is included.

1 :	IAS - Institut d'astrophysique spatiale
2 :	PCC - Physique Corpusculaire et Cosmologie - Collège de France

Thème(s)

:

Planète et Univers/Astrophysique Physique/Astrophysique/Cosmologie et astrophysique extra-galactique

Mot(s)-clé(s) : cosmic microwave background – cosmological parameter – galaxies: clusters: general

in2p3-00022118, version 1

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Contributeur : Simone Lantz <>

Soumis le : Lundi 15 Janvier 2007, 13:15:32

Dernière modification le : Lundi 15 Janvier 2007, 13:44:47