Globular cluster metallicity subpopulations in NGC 4472

被引：46

作者：

Strader, Jay ^{[1
]}

Beasley, Michael A.

Brodie, Jean P.

机构：

[1] Univ Calif Santa Cruz, Univ Calif Observ, Lick Observ, Santa Cruz, CA 95064 USA

[2] Inst Astrofis Canarias, Tenerife 38200, Spain

来源：

ASTRONOMICAL JOURNAL | 2007年 / 133卷 / 05期

关键词：

galaxies : formation; galaxies : star clusters; globular clusters : general;

D O I：

10.1086/512770

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Bimodality is a common feature of globular cluster (GC) color distributions in galaxies. Although it is well known that the GC system of the Milky Way is bimodal in metallicity, this has yet to be directly demonstrated for an elliptical galaxy. We use Lick index measurements from the literature to derive metallicities for 47 GCs in the giant Virgo elliptical galaxy NGC 4472. The resulting distribution shows clear evidence for two metallicity subpopulations of GCs.

引用

页码：2015 / 2019

页数：5

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