A Chemical Abundance Study of three RHB and two RGB stars in NGC6637 (M69)

Details A Chemical Abundance Study of three RHB and two RGB stars in NGC6637 (M69) A Chemical Abundance Study of three RHB and two RGB stars in NGC6637 (M69)

2006-04-12

arxiv.org/abs/astro-ph/0604268v1

Astronomy and Astrophysics

Astrophysics

to appear in the Proceedings of the 7th Pacific Rim Conference on Stellar Astrophysics, November 1--5, 2005, Sejong University

Scientific paper

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). The value of [Fe/H] derived from LTE calculations is $-$0.77 $\pm$ 0.02 dex. We also discuss the anticorrelation between oxygen and sodium abundances in the program stars and compare the [Si/Ti] ratio of NGC 6637 with those of other globular clusters.

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