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A&A Supplement series, Vol. 123, May II 1997, 119-133

Received March 4; accepted August 21, 1996

The supercluster-void network

I. The supercluster catalogue and large-scale distribution

M. Einastotex2html_wrap1607, E. Tagotex2html_wrap1609, J. Jaanistetex2html_wrap1611, J. Einastotex2html_wrap1613, and H. Andernachtex2html_wrap1615

Send offprint request: M. Einasto

tex2html_wrap1617  Tartu Observatory, EE-2444 Tõravere, Estonia
tex2html_wrap1619  IUE Observatory, Villafranca, Apartado 50727, E-28080 Madrid, Spain


We investigate the distribution of superclusters and voids using a new catalogue of superclusters of rich clusters of galaxies which extends up to a redshift of z = 0.12. The new catalogue contains 220 superclusters of rich clusters, of which 90 superclusters have been determined for the first time. Among them there are several very rich superclusters, containing at least eight member clusters.

We demonstrate that two thirds of very rich superclusters are concentrated to a Dominant Supercluster Plane which is situated at a right angle with respect to the plane of the Local Supercluster and adjacent nearby superclusters.

We apply several methods to estimate the characteristic distance between superclusters. The results indicate consistently the presence of a quite regular supercluster-void network with scale of tex2html_wrap_inline1591 htex2html_wrap_inline1593 Mpc.

Comparison with random supercluster catalogues shows significant differences between spatial distributions of real and random superclusters.

We determine the selection function of the sample of clusters and suggest that the mean true space density of Abell clusters is tex2html_wrap_inline1595, twice the conventionally used valuegif.

keywords: cosmology: observations -- large-scale structure of the Universe -- clusters of galaxies -- catalogs

Copyright by the European Southern Observatory (ESO)