Globular Cluster Metallicity Subpopulations in NGC 4472 | Zendy

Jay Strader | Zendy; Michael A. Beasley | Zendy; Jean P. Brodie | Zendy

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Globular Cluster Metallicity Subpopulations in NGC 4472

Author(s) -

Jay Strader,

Michael A. Beasley,

Jean P. Brodie

Publication year - 2007

Publication title -

the astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.61

H-Index - 271

eISSN - 1538-3881

pISSN - 0004-6256

DOI - 10.1086/512770

Subject(s) - globular cluster , astrophysics , physics , metallicity , virgo cluster , bimodality , elliptical galaxy , milky way , astronomy , galaxy , brightest cluster galaxy

Bimodality is a common feature of globular cluster (GC) color distributionsin galaxies. Although it is well known that the GC system of the Milky Way isbimodal in metallicity, this has yet to be directly demonstrated for anelliptical galaxy. We use Lick index measurements from the literature to derivemetallicities for 47 GCs in the giant Virgo elliptical galaxy NGC 4472. Theresulting distribution shows clear evidence for two metallicity subpopulationsof GCs.Comment: Accepted to AJ, 16 pages, 5 figure

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