Release 11.12 ("Hergest Ridge")


Gclusters :: Bibliographic item "gc440"

Article ID: gc440
AuthorVandenBerg, Don A.; Brogaard, K.; Leaman, R.; Casagrande, L.
TitleThe Ages of 55 Globular Clusters as Determined Using an Improved "Delta V^HB_TO" Method along with Color-Magnitude Diagram Constraints, and Their Implications for Broader Issues
JournalThe Astrophysical Journal, Volume 775, Issue 2, article id. 134, 47 pp.
Year of publication2013 (on gclusters from 2014-01-31 09:15:20 )
AbstractAges have been derived for 55 globular clusters (GCs) for which Hubble Space Telescope Advanced Camera for Surveys photometry is publicly available. For most of them, the assumed distances are based on fits of theoretical zero-age horizontal-branch (ZAHB) loci to the lower bound of the observed distributions of HB stars, assuming reddenings from empirical dust maps and metallicities from the latest spectroscopic analyses. The age of the isochrone that provides the best fit to the stars in the vicinity of the turnoff (TO) is taken to be the best estimate of the cluster age...
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