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2000AJ....120..879H - Astron. J., 120, 879-893 (2000/August-0)
Hubble space telescope photometry of the metal-rich globular clusters NGC 6624 and NGC 6637.
HEASLEY J.N., JANES K.A., ZINN R., DEMARQUE P., DA COSTA G.S. and CHRISTIAN C.A.
Abstract (from CDS):
The positions of NGC 6624 and NGC 6637 in the Galaxy suggest that they belong to the bulge population of globular clusters. The only other bulge clusters that have been dated so far are the more metal rich clusters NGC 6528 and NGC 6553, which also appear to be very old. Consequently, the age-metallicity relation of the bulge may be very steep. The close similarity of the ages and metallicities of NGC 6624 and NGC 6637 to the thick-disk globular clusters 47 Tuc and NGC 6352 indicates that the age-metallicity relations of these populations intersect. We briefly discuss the possibility that these populations had a common origin.
Abstract Copyright: ∼
Journal keyword(s): Galaxy: Formation - globular clusters: individual (NGC 6624, NGC 6637)
Simbad objects: 15
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