Elemental Abundances in M31
My collaborators and I have undertaken the largest deep (5+ hr) spectroscopic survey of M31 to date using the DEIMOS instrument on Keck. We have made the first measurements of [Fe/H] and [α/Fe] for individual red giants in the inner stellar halo and the stellar disk, and have substantially increased the number of available chemical abundance measurements in the outer halo and M31's dwarf galaxies. See Escala+19,20a,20b (subm.), Gilbert+19,20, Kirby+20, and Wojno+20 for our key results.