Optical and X-ray clusters as tracers of the supercluster-void network. I.Superclusters of Abell and X-ray clusters

Citation
M. Einasto et al., Optical and X-ray clusters as tracers of the supercluster-void network. I.Superclusters of Abell and X-ray clusters, ASTRONOM J, 122(5), 2001, pp. 2222-2242
Citations number
94
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMICAL JOURNAL
ISSN journal
0004-6256 → ACNP
Volume
122
Issue
5
Year of publication
2001
Pages
2222 - 2242
Database
ISI
SICI code
0004-6256(200111)122:5<2222:OAXCAT>2.0.ZU;2-X
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 selec tion functions and percolation properties of Abell clusters of richness cla ss R = 0 and R greater than or equal to 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 cluster s out to a redshift of z(lim) = 0.13, a catalog of X-ray clusters located i n superclusters deter mined by Abell clusters, and a list of additional sup erclusters of X-ray clusters. We investigate the distribution of X-ray-sele cted clusters of galaxies with respect to superclusters determined by Abell clusters of galaxies and show that the distribution of X-ray clusters foll ows the supercluster-void network determined by Abell clusters. We find tha t X-ray clusters are more strongly clustered than other clusters: the fract ion 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 cluste rs. Poor, non-Abell X-ray clusters follow the supercluster-void network as well: these clusters are embedded in superclusters determined by Abell clus ters and populate filaments between them.