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astro-ph1997
On the Production of Bright RR Lyrae Variables in Metal-Rich Globular Clusters
A. V. Sweigart, M. Catelan
Recent HST observations of the metal-rich bulge clusters NGC 6388 and NGC 6441 by Rich et al. (1997) have found that the horizontal branches (HBs) in these clusters slope upward wi…
astro-ph1997★ 103 cited
Bimodality and Gaps on Globular Cluster Horizontal Branches. II. The Cases of NGC 6229, NGC 1851 and NGC 2808
M. Catelan, J. Borissova, A. V. Sweigart +1
The outer-halo globular cluster NGC 6229 has a peculiar horizontal-branch (HB) morphology, with clear indications of a bimodal HB and a ``gap" on the blue HB. In this paper, we pre…