Key points are not available for this paper at this time.
The ACS Survey of Galactic Globular Clusters, an HST Treasury Project, will deliver high quality, homogeneous photometry of 65 globular clusters. This paper introduces a new collection of stellar evolution tracks and isochrones suitable for analyzing the ACS Survey data. Stellar evolution models were computed at Fe/H =-2.5,-2.0,-1.5,-1.0,-0.5, and 0; α/Fe =-0.2, 0, 0.2, 0.4, 0.6, and 0.8; and three initial He abundances for masses from 0.1 to 1.8 M ⊙ and ages from 2 to 15 Gyr. Each isochrone spans a wide range in luminosity from MV ∼14 1
Dotter et al. (Tue,) studied this question.