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Evidence for biasing in the CfA surveyIntrinsically bright galaxies appear systematically more correlated than faint galaxies in the Center for Astrophysics redshift survey. The amplification of the two-point correlation function behaves exponentially with luminosity, being essentially flat up to the knee of the luminosity function, then increasing markedly. The amplification reaches a factor of 3.5e + or - 0.4 in the very brightest galaxies. The effect is dominated by spirals rather than ellipticals, so that the correlation function of bright spirals becomes comparable to that of normal ellipticals. Similar results are obtained whether the correlation function is measured in two or three dimensions. The effect persists to separations of a correlation length or more, and is not confined to the cores of the Virgo, Coma, and Abell 1367 clusters, suggesting that the effect is caused by biasing, that is, galaxies kindle preferentially in more clustered regions, rather than by gravitational relaxation.
Document ID
19880062089
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hamilton, A. J. S.
(Joint Institute for Laboratory Astrophysics Boulder, CO, United States)
Date Acquired
August 13, 2013
Publication Date
August 15, 1988
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 331
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
88A49316
Funding Number(s)
CONTRACT_GRANT: NSG-7128
CONTRACT_GRANT: NSF AST-86-58022
CONTRACT_GRANT: NAGW-766
Distribution Limits
Public
Copyright
Other

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