Release 11.12 ("Hergest Ridge")

Gclusters :: Bibliographic item "gc179"

Article ID: gc179
AuthorRich, R. M.; Ortolani, S.; Bica, E.; Barbuy, B.
TitleVI Photometry of the Post-Core-Collapse Globular Cluster NGC 6558
and the Adjacent Bulge Field Population
JournalThe Astronomical Journal, Volume 116, Issue 3, pp. 1295-1300 (1998)
Year of publication1998 (on gclusters from 2007-10-04 12:15:46 )
AbstractWe 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
TagsNGC 6558 , cmd

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