NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Galaxy clusters and cold dark matter - A low-density unbiased universe?Large-scale simulations of a universe dominated by cold dark matter (CDM) are tested against two fundamental properties of clusters of galaxies: the cluster mass function and the cluster correlation function. We find that standard biased CDM models are inconsistent with these observations for any bias parameter b. A low-density, low-bias CDM-type model, with or without a cosmological constant, appears to be consistent with both the cluster mass function and the cluster correlations. The low-density model agrees well with the observed correlation function of the Abell, Automatic Plate Measuring Facility (APM), and Edinburgh-Durham cluster catalogs. The model is in excellent agreement with the observed dependence of the correlation strength on cluster mean separation, reproducing the measured universal dimensionless cluster correlation. The low-density model is also consistent with other large-scale structure observations, including the APM angular galaxy-correlations, and for lambda = 1-Omega with the COBE results of the microwave background radiation fluctuations.
Document ID
19930027911
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bahcall, Neta A.
(NASA Headquarters Washington, DC United States)
Cen, Renyue
(Princeton Univ. Observatory, NJ, United States)
Date Acquired
August 15, 2013
Publication Date
October 20, 1992
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 398
Issue: 2
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
93A11908
Funding Number(s)
CONTRACT_GRANT: NAGW-765
CONTRACT_GRANT: NAGW-2448
CONTRACT_GRANT: NSF AST-90-06958
CONTRACT_GRANT: NSF AST-91-08103
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available