The supercluster-void network V.
The regularity periodogram
Tartu Observatory, 61602 Tõravere, Estonia
2 Research Center for the Early Universe, University of Tokyo, Tokyo 113-0033, Japan
3 Landau Institute for Theoretical Physics, Moscow 117 334, Russia
4 Depto. de Astronomía, Univ. Guanajuato, Apdo. Postal 144, C.P. 36000, Guanajuato, Mexico
Corresponding author: J. Einasto, firstname.lastname@example.org
Accepted: 28 May 2002
We analyze the distribution of Abell clusters of galaxies to study the regularity of the supercluster-void network. We apply a new method, the regularity periodogram, that is sensitive to the geometry of the location of clusters, and measure the regularity of the network. We find that the supercluster-void network resembles a cubic lattice over the entire volume considered (out to the distance of 350 h-1 Mpc). The distribution of clusters in rich superclusters is not isotropic: it is periodic along a cubic lattice approximately aligned with the supergalactic coordinates . This large-scale inhomogeneity does not contradict recent CMB data, but its theoretical explanation remains a challenge.
Key words: cosmology: observations / cosmology: large-scale structure of the Universe
© ESO, 2002