Release 11.12 ("Hergest Ridge")

Gclusters :: Bibliographic item "gc528"

Article ID: gc528
AuthorMauro, Francesco et al.
TitleDouble Horizontal Branches in NGC 6440 and NGC 6569 Unveiled by the VVV Survey
JournalThe Astrophysical Journal Letters, Volume 761, Issue 2, article id. L29, 6 pp.
Year of publication2012 (on gclusters from 2017-02-24 10:37:44 )
AbstractWe report the discovery of a peculiar horizontal branch (HB) in NGC 6440 and NGC 6569, two massive and metal-rich Galactic globular clusters (GGCs) located in the Galactic bulge, within 4 kpc from the Galactic center. In both clusters, two distinct clumps are detected at the level of the cluster HB (...) Our analysis demonstrates that these clumps are real cluster features, not a product of field contamination or interstellar reddening (...) Our discovery suggests that such a peculiar HB morphology could be a common feature of massive, metal-rich bulge galactic globular clusters.
Also available at:
TagsNGC 6440 , NGC 6569

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