The Shape, Multiplicity, and Evolution of Superclusters in LambdaCDM Cosmology
Abstract
We determine the shape, multiplicity, size, and radial structure of superclusters in the LambdaCDM concordance cosmology from z = 0 to z = 2. Superclusters are defined as clusters of clusters in our large-scale cosmological simulation. We find that superclusters are triaxial in shape; many have flattened since early times to become nearly two-dimensional structures at present, with a small fraction of filamentary systems. The size and multiplicity functions are presented at different redshifts. Supercluster sizes extend to scales of ~ 100 - 200 Mpc/h. The supercluster multiplicity (richness) increases linearly with supercluster size. The density profile in superclusters is approximately isothermal (~ R^{-2}) and steepens on larger scales. These results can be used as a new test of the current cosmology when compared with upcoming observations of large-scale surveys.
Keywords
Cite
@article{arxiv.astro-ph/0603060,
title = {The Shape, Multiplicity, and Evolution of Superclusters in LambdaCDM Cosmology},
author = {James J. Wray and Neta A. Bahcall and Paul Bode and Carl Boettiger and Philip F. Hopkins},
journal= {arXiv preprint arXiv:astro-ph/0603060},
year = {2008}
}
Comments
33 pages, 15 figures, accepted to ApJ; minor content changes, some figures removed to shorten paper