The Hubble Space Telescope Survey of M31 Satellite Galaxies. III. Calibrating the Horizontal Branch as an Age Indicator for Nearby Galaxies

Connor Jennings, Alessandro Savino, Daniel Weisz +14

We present a new method for measuring the mean age of old/intermediate stellar populations in resolved, metal-poor ($⟨[Fe/H]⟩\lesssim -1.5$) galaxies using only th…