Multicolor CCD photometry of globular clusters in two Virgo elliptical galaxies

Journal Article · Wed May 01 04:00:00 EDT 1991 · Astrophysical Journal; (United States)

DOI:https://doi.org/10.1086/169957· OSTI ID:5589071

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

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1. McMaster University, Hamilton (Canada)

New CCD photometry in the BVI system is presented for a sample of globular clusters in NGC 4472, and in BV for NGC 4649. Both of these represent 'normal' globular cluster systems in giant elliptical galaxies. Just as in the Virgo central giant M87, it is found that the clusters in both these galaxies show a large dispersion in color at any radius from the center, and that they are distinctly bluer than the integrated halo light. However, quite unlike M87, a clear radial gradient is found in the mean cluster colors in both NGC 4472 and 4649, suggesting that the role of dissipational collapse was more important in their formation than it was in M87. 56 refs.

• OSTI ID: 5589071
• Journal Information: Astrophysical Journal; (United States), Journal Name: Astrophysical Journal; (United States) Vol. 372; ISSN ASJOA; ISSN 0004-637X
• 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
COLOR
CONFIGURATION
ELLIPTICAL CONFIGURATION
GALAXY CLUSTERS
OPTICAL PROPERTIES
ORGANOLEPTIC PROPERTIES
PHOTOMETRY
PHYSICAL PROPERTIES
STAR CLUSTERS
STAR EVOLUTION