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Simulations of Large-Scale Structure Compared to Abell Cluster Distribution

Published online by Cambridge University Press:  19 July 2016

David J. Batuski
Affiliation:
Space Telescope Science Institute, Homewood Campus Baltimore, MD 21218 USA
Adrian Melott
Affiliation:
Department of Physics and Astronomy, Univ. of Kansas Lawrence, KS 66045 USA
Jack O. Burns
Affiliation:
Institute for Astrophysics, Univ. of New Mexico Albuquerque, NM 87131 USA

Abstract

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The amount of structure present among the Abell clusters out to redshift z = 0.085 has been compared with numerical supercomputer simulations (with 643 particles) of the isothermal, neutrino, and cold particle models for large-scale structure, assuming a flat universe and H = 50 km sec−1 Mpc−1. High-density clusters of particles were identified in each simulation. Correlation and percolation tests were then used to compare the spatial distribution of these high-density points with the apparent superclustering among Abell clusters. While all of the models had some small superclusters (the neutrino model has too many), none came very close to possessing the extremely extensive structures found in the Abell clusters (generally, disagreement by 2σ or more).

A second set of simulations used the cold particle model with Ω = 0.2 and 0.5. The structures found in these simulations were certainly larger than those of the Ω = 1.0 cold particle case, but still > 2σ too small in comparisons with the Abell clusters.

Type
CHAPTER IV: The Large Scale Distribution of Galaxies
Copyright
Copyright © Reidel 1987 

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