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Title:
Brightest Cluster Galaxy Profile Shapes
Authors:
Graham, Alister; Lauer, Tod R.; Colless, Matthew; Postman, Marc
Publication:
Astrophysical Journal v.465, p.534 (ApJ Homepage)
Publication Date:
07/1996
Origin:
APJ; NED
ApJ Keywords:
GALAXIES: CLUSTERS: GENERAL, GALAXIES: ELLIPTICAL AND LENTICULAR, CD, GALAXIES: PHOTOMETRY, GALAXIES: STRUCTURE
DOI:
10.1086/177440
Bibliographic Code:
1996ApJ...465..534G

Abstract

We model the surface brightness profiles of a sample of 119 Abell brightest cluster galaxies (BCGs), finding a generalized de Vaucouleurs R^1/n^ law, where n is a free parameter, to be appropriate. Departures from the R^1/4^ law are shown to be a real feature of galaxy profiles and not due to observational errors or coupling of n with the other model parameters. BCGs typically have values of n greater than 4. The shape parameter n is shown to correlate with effective half-light radius, such that the larger BCGs have larger values of n. This continues a trend noticed amongst ordinary elliptical galaxies and dwarf elliptical galaxies, such that the brighter galaxies have larger values of n.

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