Release 11.12 ("Hergest Ridge")
Release 11.12 ("Hergest Ridge")
| Article ID: gc455 | |
| Author | Lagioia, E. P. |
| Title | On the Kinematic Separation of Field and Cluster Stars across the Bulge Globular NGC 6528 |
| Journal | The Astrophysical Journal, Volume 782, Issue 1, article id. 50, 11 pp. |
| Year of publication | 2014 (on gclusters from 2014-03-14 16:03:24 ) |
| Abstract | We present deep and precise multi-band photometry of the Galactic bulge globular cluster NGC 6528. The current data set includes optical and near-infrared images collected with ACS/WFC, WFC3/UVIS, and WFC3/IR on board the Hubble Space Telescope. The images cover a time interval of almost 10 yr, and we have been able to carry out a proper-motion separation between cluster and field stars (...) e found that NGC 6528 is coeval with and more metal-rich than 47 Tuc. Moreover, it appears older and more metal-poor than the super-metal-rich open cluster NGC 6791. The current evidence is supported by several diagnostics (red horizontal branch, red giant branch bump, shape of the sub-giant branch, slope of the main sequence) that are minimally affected by uncertainties in reddening and distance... |
| Also available at: | http://arxiv.org/abs/1312.2272 |
| Tags | NGC 6528 |
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