Cosmology with Galaxy Clusters through the Sunyaev-Zel'dovich effect
Abstract
Future Sunyaev-Zel'dovich effect (SZE) surveys will detect thousands of clusters, many of them at high redshift. We show how the SZE number counts as a function of flux can be used as a useful way of constraining the cosmological model. The constraints can be dramatically improved if redshift information is provided for a small subsample of the observed clusters. In this work we present the constraints in Omega_m and Sigma_8 expected for a combined mm-optical survey. The mm survey (Planck) providing the cluster number counts as a function of flux and the optical survey (GTC) the redshift estimation of a small subsample of the cluster catalogue. We also show how it is possible to get an accurate estimate of the cluster flux using a non-parametric component separation algorithm and how using morphological redshifts it is possible to make a high-z preselection of the small subsample to be observed in the optical.
Keywords
Cite
@article{arxiv.astro-ph/0211223,
title = {Cosmology with Galaxy Clusters through the Sunyaev-Zel'dovich effect},
author = {J. M. Diego},
journal= {arXiv preprint arXiv:astro-ph/0211223},
year = {2007}
}
Comments
4 pages, 4 figures. To appear in Proceedings of the V Meeting of the Spanish Society of Astronomy (SEA). `Highlights of Spanish Astrophysics III'. Ed. J. Gallego, J. Zamorano and N. Cardiel, ASSL, Kluwer