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Title:
Globular Cluster Metallicity Subpopulations in NGC 4472
Authors:
Strader, Jay; Beasley, Michael A.; Brodie, Jean P.
Affiliation:
AA(UCO/Lick Observatory, University of California, Santa Cruz, CA 95064, USA; , .), AB(Instituto de Astrofísica de Canarias, 38200 La Laguna, Tenerife, Spain; .), AC(UCO/Lick Observatory, University of California, Santa Cruz, CA 95064, USA; , .)
Publication:
The Astronomical Journal, Volume 133, Issue 5, pp. 2015-2019. (AJ Homepage)
Publication Date:
05/2007
Origin:
UCP
AJ Keywords:
Galaxies: Formation, Galaxies: Star Clusters, Galaxy: Globular Clusters: General
Abstract Copyright:
(c) 2007: The American Astronomical Society
DOI:
10.1086/512770
Bibliographic Code:
2007AJ....133.2015S

Abstract

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.
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