BVI photometry of globular clusters in M87

CCD photometry in B, V, and I is presented for a sample of globular clusters in the Virgo central giant elliptical galaxy M87. No detectable gradient of mean cluster color (metallicity) in (B - V) or (V - I) with radial distance is found. The cluster system does, however, display a large dispersion...

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Bibliographic Details
Published in:The Astrophysical journal. Supplement series 1990-08, Vol.73 (4), p.671-683
Main Author: COUTURE, J
Format: Article
Language:English
Subjects:
640102 - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources
ABUNDANCE
Astronomy
CHARGE-COUPLED DEVICES
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COLOR
CONFIGURATION
Earth, ocean, space
ELEMENT ABUNDANCE
ELLIPTICAL CONFIGURATION
Exact sciences and technology
GALAXIES
GALAXY NUCLEI
Globular clusters in external galaxies
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
PHOTOMETRY
PHYSICAL PROPERTIES
SEMICONDUCTOR DEVICES
SPECTROPHOTOMETRY
STAR CLUSTERS
Stellar clusters and associations
Stellar systems. Galactic and extragalactic objects and systems. The universe
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Summary:CCD photometry in B, V, and I is presented for a sample of globular clusters in the Virgo central giant elliptical galaxy M87. No detectable gradient of mean cluster color (metallicity) in (B - V) or (V - I) with radial distance is found. The cluster system does, however, display a large dispersion in color at any radius, corresponding to sigma (Fe/H) about 0.6 about a mean metallicity of about -1.1 according to the present color index scale. The difference in mean color between the globular clusters and the underlying halo light of the galaxy itself shows up strongly in all the color indices; virtually no clusters as red as the mean color of the halo stars is found at any radius. 43 refs.
ISSN:0067-0049
1538-4365
DOI:10.1086/191484