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Primordial inhomogeneities in the expanding universe. I - Density and velocity distributions of galaxies in the vicinities of rich clustersThe density profiles and Hubble flow deviations in the vicinities of rich galaxy clusters are derived for a variety of models of initial density and velocity perturbations at the recombination epoch. The galaxy correlation function, measured with respect to the Abell clusters, is used to normalize the theoretical models. The angular scales of the required primordial inhomogeneities are calculated. It is found that the resulting density profiles around rich clusters are surprisingly insensitive to the shape of the initial perturbations and also to the cosmological density parameter, Omega. However, it is shown that the distribution of galaxy radial velocities can provide a possible means of deriving Omega.
Document ID
19790043663
Document Type
Reprint (Version printed in journal)
Authors
Silk, J. (California Univ. Berkeley, CA, United States)
Wilson, M. L. (California, University Berkeley, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
March 15, 1979
Publication Information
Publication: Astrophysical Journal
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NGR-05-003-578
Distribution Limits
Public
Copyright
Other