Abstract
We present a detailed chemical abundance study of three red horizontal branch and two red giant branch stars in the metal-rich globular cluster NGC 6637 (M69). We performed LTE calculations and obtained [Fe/H] = -0.77 ± 0.02 dex. The anticorrelation between oxygen and sodium abundances in the program stars and the comparison of the [Si/Ti] ratio of NGC637 with those of other globular clusters are discussed.
