Traveling back in time: Asteroseismology of low-metallicity red giants from TESS

Galactic archaeology has long been limited by a lack of precise masses and ages for metal-poor stars in the Milky Way's thick disk. However, with TESS providing a growing number of photometric observations, it is possible to calculate such physical properties for more solar-like oscillators than ever using asteroseismology. We have used the pySYD pipeline to determine global asteroseismic parameters and calculated the masses and ages of 415 metal-poor ([M/H] < -0.5 dex) red giants in TESS's continuous viewing zones. Our findings contribute to a noticeable trend in metallicity-dependent mass loss on the upper red-giant branch and identify a set of young high-⍺ stars that have been detected in other studies. We also find that 15% of the metal-poor stars appear to be binary merger products. In combination with existing ages from Kepler/K2, these data can be compared to Galactic evolution models to better determine the formation history of the Galaxy.