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Large-scale structure after COBE: Peculiar velocities and correlations of cold dark matter halosLarge N-body simulations on parallel supercomputers allow one to simultaneously investigate large-scale structure and the formation of galactic halos with unprecedented resolution. Our study shows that the masses as well as the spatial distribution of halos on scales of tens of megaparsecs in a cold dark matter (CDM) universe with the spectrum normalized to the anisotropies detected by Cosmic Background Explorer (COBE) is compatible with the observations. We also show that the average value of the relative pairwise velocity dispersion sigma(sub v) - used as a principal argument against COBE-normalized CDM models-is significantly lower for halos than for individual particles. When the observational methods of extracting sigma(sub v) are applied to the redshift catalogs obtained from the numerical experiments, estimates differ significantly between different observation-sized samples and overlap observational estimates obtained following the same procedure.
Document ID
19950029357
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Zurek, Wojciech H. (LANL, Los Alamos, NM United States)
Quinn, Peter J. (Mount Stromlo Observatory Weston Creek, Australia)
Salmon, John K. (Caltech Concurrent Supercomputing Facility, Pasadena, CA United States)
Warren, Michael S. (LANL, Los Alamos, NM United States)
Date Acquired
August 16, 2013
Publication Date
August 20, 1994
Publication Information
Publication: The Astrophysical Journal
Volume: 431
Issue: 2, pt
Subject Category
ASTROPHYSICS
Distribution Limits
Public
Copyright
Other