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Title:
Are compact groups of galaxies physically dense?
Authors:
Mamon, G. A.
Affiliation:
AA(Princeton University Observatory, NJ; New York University, NY)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 307, Aug. 15, 1986, p. 426-430. (ApJ Homepage)
Publication Date:
08/1986
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ASTROPHYSICS, GALACTIC CLUSTERS, SPACE DENSITY, DENSITY DISTRIBUTION, RANDOM PROCESSES
DOI:
10.1086/164431
Bibliographic Code:
1986ApJ...307..426M

Abstract

The properties of the compact groups of galaxies cataloged by Hickson (1982) are compared to the output of over 1000 numerical simulations of small groups of galaxies. Rather than being dense physical systems or transient unbound cores of loose groups, it is argued that roughly half of the compact groups in Hickson's catalog are simply chance alignments of galaxies within loose groups.

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