Properties of Galaxy Clusters Associated with Quasars
The existence of a relationship between environment and quasar activty has been demonstrated by many recent investigations. In particular, preliminary evidence of a time dependence of this correlation has been provided by Yee and Green (1987, hereafter YG87) who found that at z > 0.5, unlike at lower redshifts, radio-loud quasars do exist in the cores of rich clusters. Thus, the study of galaxy clusters harbouring quasars will provide us not only with insights into the triggering and fueling of quasar activity, but also with evidence for evolution in the properties of moderately high-redshift galaxy clusters. This paper presents some preliminary results from our study of galaxy clusters which were discovered by virtue of their association with quasars. Specifically, we present data on 4 clusters found around quasars at redshifts ranging from 0.2 to 0.65. H o = 50 km/sec/Mpc and q o = 0.02 are used throughout this paper.
KeywordsGalaxy Cluster Core Radius Luminosity Function Central Engine Rich Cluster
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