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Date and Time of the Query: 2019-07-16 T04:12:39 PDT
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For refcode 2001AJ....122.2222E:
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2001AJ....122.2222E OPTICAL AND X-RAY CLUSTERS AS TRACERS OF THE SUPERCLUSTER-VOID NETWORK. I. SUPERCLUSTERS OF ABELL AND X-RAY CLUSTERS M. EINASTO, J. EINASTO, E. TAGO,1 V. MULLER, AND H. ANDERNACH Received 2000 December 31; accepted 2001 August 6 ABSTRACT We study the distribution of Abell and X-ray-selected clusters of galaxies and derive selection functions of these cluster samples. We find that selection functions and percolation properties of Abell clusters of richness class R = 0 and R >= 1 are similar; the percolation of X-ray clusters occurs at the same dimensionless radius as the percolation of Abell clusters. We present a new catalog of superclusters of Abell clusters out to a redshift of z_lim_ = 0.13, a catalog of X-ray clusters located in superclusters determined by Abell clusters, and a list of additional superclusters of X-ray clusters. We investigate the distribution of X-ray-selected clusters of galaxies with respect to superclusters determined by Abell clusters of galaxies and show that the distribution of X-ray clusters follows the supercluster-void network determined by Abell clusters. We find that X-ray clusters are more strongly clustered than other clusters: the fraction of X-ray clusters is higher in rich superclusters, and the fraction of isolated X-ray clusters is lower than the fraction of isolated Abell clusters. Poor, non-Abell X-ray clusters follow the supercluster-void network as well: these clusters are embedded in superclusters determined by Abell clusters and populate filaments between them. Key words: cosmology: observations - galaxies: clusters: general - large-scale structure of universe
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