2001/07/24 by I. M. Gioia, Isabella Gioia, Gioia, Isabella
Physics and Astronomy · #Astronomy and Astrophysical Research #Galaxies: Formation, Evolution, Phenomena #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0107452
to appear in the proceedings of "Chemical Enrichmen of Intracluster and Intergalactic Medium", Vulcano (Sicily, Italy), May 14th to 19th, 2001. 5 pages, 2 figures plus 2 separate figures in jpg format
arxiv created 2001/07/24 · arxiv updated 2009/12/01
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 > 1.8×1044 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.