PHAST data yield spatially resolved SFHs across M31's southern disk showing a global recent SFR decline driven by reduced ring activity, with mean rates of 0.445 and 0.285 solar masses per year over the last 100 and 20 Myr.
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The Panchromatic Hubble Andromeda Southern Treasury (PHAST). II. The Spatially Resolved Recent Star Formation History in M31
PHAST data yield spatially resolved SFHs across M31's southern disk showing a global recent SFR decline driven by reduced ring activity, with mean rates of 0.445 and 0.285 solar masses per year over the last 100 and 20 Myr.