The 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
Ages 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
VandenBerg, D. A. et al.
Fecha de publicación:
10
2013