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Abundances for giant stars in the Draco dwarf galaxy

The abundances of 14 giant stars with +0.2 > M V > -2.5 (19.6 > V > 16.9) in the Draco dwarf galaxy, using a synthetic spectral analysis of the calcium infrared triplet and the strongest line (5183 A) of the magnesium b triplet. The average abundance of the galaxy is ∼-1.9 ± 0.4 (all quoted uncertainties are 1 σ), with a range from ∼-1.4 to -2.4. As previously noted by Zinn and Kinman et al., the abundances seem to fall into two groups, one with an average [Ca, Mg/H] near -1.6 ± 0.2 and the other -2.3 ± 0.2