Studies of the evolution of the X ray emission of clusters of galaxies

Details Studies of the evolution of the X ray emission of clusters of galaxies Studies of the evolution of the X ray emission of clusters of galaxies

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990huha.rept.....h&link_type=abstract

Final Technical Report, 1 Jul. 1988 - 31 Dec, 1989 Hawaii Univ., Honolulu. Inst. of Astronomy.

Astronomy and Astrophysics

Astronomy

Astronomical Models, Dark Matter, Galactic Clusters, Galactic Evolution, Luminosity, X Rays, Extraterrestrial Matter, Heao 2, Red Shift

Scientific paper

The x ray luminosity function of clusters of galaxies was determined at different cosmic epoches using data from the Einstein Observatory Extended Medium Survey. The sample consisted of 67 x ray selected clusters that were grouped into three redshift shells. Evolution was detected in the x ray properties of clusters. The present volume density of high luminosity clusters was found to be greater than it was in the past. This result is the first convincing evidence for evolution in the x ray properties of clusters. Investigations into the constraints provided by these data on various Cold Dark Matter models are underway.

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