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

Jae-Woo Lee·Mercedes Lopez-Morales
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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). 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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Jae-Woo Lee, Mercedes Lopez-Morales. 2006-04-12. A Chemical Abundance Study of three RHB and two RGB stars in NGC6637 (M69). https://arxiv.org/abs/astro-ph/0604268

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