Evolution of X-ray Luminous Clusters from z=0.3 to z=0.8

Details Evolution of X-ray Luminous Clusters from z=0.3 to z=0.8 Evolution of X-ray Luminous Clusters from z=0.3 to z=0.8

2001-07-24

arxiv.org/abs/astro-ph/0107452v1

Astronomy and Astrophysics

Astrophysics

to appear in the proceedings of "Chemical Enrichmen of Intracluster and Intergalactic Medium", Vulcano (Sicily, Italy), May 14

Scientific paper

Observations of the highest redshift clusters provide the longest lever arm in the attempt to evaluate the evolution of their bulk properties. I present the most recent results on galaxy cluster evolution based on data from the ROSAT North Ecliptic Pole survey. At $z>0.3$ there is a deficit of clusters with respect to the local universe which is significant at $>$ 4.7$\sigma$. The evolution appears to begin at L$_{0.5-2.0} > 1.8\times10^{44}$ erg s$^{-1}$ in the NEP survey data and goes in the same direction as the original EMSS result. At lower redshifts there is no evidence for evolution, a result in agreement with all the existing cluster surveys.

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