Release 11.12 ("Hergest Ridge")
Release 11.12 ("Hergest Ridge")
| Article ID: gc179 | |
| Author | Rich, R. M.; Ortolani, S.; Bica, E.; Barbuy, B. |
| Title | VI Photometry of the Post-Core-Collapse Globular Cluster NGC 6558 and the Adjacent Bulge Field Population |
| Journal | The Astronomical Journal, Volume 116, Issue 3, pp. 1295-1300 (1998) |
| Year of publication | 1998 (on gclusters from 2007-10-04 12:15:46 ) |
| Abstract | We present VI color-magnitude diagrams (CMDs) of the globular cluster NGC 6558 and its surrounding field, obtaining cluster parameters. The cluster has a blue extended horizontal branch and a depleted red giant branch, characteristics already observed in other post-core-collapse clusters in the bulge, such as NGC 6522, NGC 6540, and HP 1. These clusters do not belong to the metal-rich stellar population, and they may define a distinct class in the bulge... |
| CM diagram |  |
| Tags | NGC 6558 , cmd |
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