The Local Galaxy Cluster Mass Function of the Brightest Clusters in the Sky - I

Mathematics – Logic

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Groups Of Galaxies, Clusters Of Galaxies, Supercluster, A1736, A2657, A0119, Xmm-Newton Proposal 04021905

Scientific paper

Galaxy clusters have proven to be highly competitive and complementary cosmological probes. For the next major breakthrough more reliable mass estimates and, therefore, a better understanding of cluster physics are essential. We propose to complete XMM-Newton observations of a flux-limited sample of the 64 X-ray brightest clusters in the sky to (i) take full advantage of ~3 Ms of XMM-Newton data already available, (ii) determine very precise gas temperature profiles, (iii) characterize merging clusters by direct comparison to simulations, (iv) update the luminosity-mass relation, (v) construct the most precise local cluster mass function, (vi) improve constraints on OmegaM and sigma8 significantly, and (vii) provide a reliable statistical baseline for comparison to high-redshift samples.

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