Evolution of X - ray Luminous Clusters from z = 0 . 3 to z = 0 . 8
نویسنده
چکیده
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 > 4.7σ. The evolution appears to begin at L0.5−2.0 > 1.8×10 44 erg s 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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