Brightest cluster galaxy profile shapes

被引：178

作者：

Graham, A ^{[1
]}

Lauer, TR ^{[1
]}

Colless, M ^{[1
]}

Postman, M ^{[1
]}

机构：

[1] SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218

来源：

ASTROPHYSICAL JOURNAL | 1996年 / 465卷 / 02期

关键词：

galaxies; clusters; general; elliptical and lenticular; cD; photometry; structure;

D O I：

10.1086/177440

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：534 / 547

页数：14

共 49 条

[31] A 20 CM VLA SURVEY OF ABELL CLUSTERS OF GALAXIES .5. OPTICAL OBSERVATIONS AND SURFACE PHOTOMETRY [J].