gru Chemical Abundances of Upper Red Giant Branch Halo Stars

We present preliminary results from a spectroscopic program that targeted RGB halo stars of comparable luminosities to those of stars in dwarf spheroidal galaxies (dSphs) accessible to high-resolution spectroscopy. We have measured abundances for alpha, iron-peak, and other light elements in 39 stars. In this contribution, we compare some of the halo and classical dSph abundance patterns We report slight enhancements in alpha-elements in the halo relative to the classical dSphs, between -2.5 less than or similar to [Fe/H] less than or similar to -1.5. [Na/Fe] in the dSphs is likewise under-abundant by at least similar to 0.2 dex in the same metallicity range. We also detect a tentative a T-eff dependence in the Mg and Si abundance ratios of our RGB sample.