Aparicio, Antonio; Marin-Franch, A; Piotto, G; Rosenberg, A; Chaboyer, Brian; Sarajedini, A; Siegel, Michael; Anderson, Jay; Dotter, Aaron; Milone, Antonino; Paust, Nathaniel; Reid, I Neill
The ACS Survey of Galactic Globular Clusters is a Hubble Space Telescope (HST) Treasury program designed to provide a new large, deep and homogeneous photometric database. Based on observations from this program, we have measured precise relative ages for a sample of 64 Galactic globular clusters by comparing the relative position of the clusters' main sequence turn offs, using main-sequence fitting to cross-compare clusters within the sample. This method provides relative ages to a formal...[Show more]
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