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Title:
The shapes of brightest cluster galaxies
Authors:
Ryden, Barbara S.; Lauer, Tod R.; Postman, Marc
Affiliation:
AA(Canadian Inst. for Theoretical Astrophysics, Toronto, Canada), AB(Kitt Peak National Observatory, Tucson, AZ), AC(Space Telescope Science Inst., Baltimore, MD)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 410, no. 2, p. 515-519. (ApJ Homepage)
Publication Date:
06/1993
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
ELLIPTICAL GALAXIES, GALACTIC CLUSTERS, GALACTIC STRUCTURE, BRIGHTNESS DISTRIBUTION, DISTRIBUTION FUNCTIONS, SHAPES
DOI:
10.1086/172769
Bibliographic Code:
1993ApJ...410..515R

Abstract

The distribution of axis ratios presently computed for a sample of brightest cluster galaxies (BCGs) is found to not vary greatly from a similar distribution for a sample of ordinary ellipticals. A significant difference is noted, however, between the distribution of axis ratios for a sample of BCGs and for a sample of second-brightest cluster ellipticals. It is also noted, in partial support for a hypothesized competition of BCGs for cluster galaxies that would otherwise merge with the second-brightest cluster ellipticals, that the shape of a merger remnant can reflect the relative masses of the progenitor as well as the angular momentum of the merging system.

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