BVI photometry of globular clusters in M87

Journal Article · Wed Aug 01 04:00:00 EDT 1990 · Astrophysical Journal, Supplement Series; (USA)

DOI:https://doi.org/10.1086/191484· OSTI ID:6551167

Couture, J; Harris, W E; Allwright, J W.B. ^[1]

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1. McMaster Univ., Hamilton (Canada)

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.

• OSTI ID: 6551167
• Journal Information: Astrophysical Journal, Supplement Series; (USA), Journal Name: Astrophysical Journal, Supplement Series; (USA) Vol. 73; ISSN APJSA; ISSN 0067-0049
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
CHARGE-COUPLED DEVICES
COLOR
CONFIGURATION
ELEMENT ABUNDANCE
ELLIPTICAL CONFIGURATION
GALAXIES
GALAXY NUCLEI
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
PHOTOMETRY
PHYSICAL PROPERTIES
SEMICONDUCTOR DEVICES
SPECTROPHOTOMETRY
STAR CLUSTERS