337 citations · 842 across the 11 of their papers we have counts for
4 papers · 1 filter
[/Fe] Abundances of Four Outer M 31 Halo Stars
Luis C. Vargas, Karoline M. Gilbert, Marla C. Geha +3
We present alpha element to iron abundance ratios, [/Fe], for four stars in the outer stellar halo of the Andromeda Galaxy (M 31). The stars were identified as high-likelihood f…
The Quenching of the Ultra-Faint Dwarf Galaxies in the Reionization Era
Thomas M. Brown, Jason Tumlinson, Marla Geha +11
We present new constraints on the star formation histories of six ultra-faint dwarf galaxies: Bootes I, Canes Venatici II, Coma Berenices, Hercules, Leo IV, and Ursa Major I. Our a…
The Distribution of Alpha Elements in Andromeda Dwarf Galaxies
Luis C. Vargas, Marla C. Geha, Erik J. Tollerud
We present alpha to iron abundance ratios for 226 individual red giant branch stars in nine dwarf galaxies of the Andromeda (M 31) satellite system. The abundances are measured fro…
Metallicity Evolution of the Six Most Luminous M31 Dwarf Satellites
N. Ho, M. Geha, E. Tollerud +3
We present global metallicity properties, metallicity distribution functions (MDFs) and radial metallicity profiles for the six most luminous M31 dwarf galaxy satellites: M32, NGC…