AAS 203rd Meeting, January 2004
Session 52 Globular Clusters
Poster, Tuesday, January 6, 2004, 9:20am-6:30pm, Grand Hall

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[52.04] Variable Stars in the Globular Cluster NGC 6637 (M69)

J.D. Gregorsok, A.C. Layden (Bowling Green State Univ), D.L. Welch (McMaster Univ), T.M.A. Webb (Leiden Obs.)

We present time-series VI photometry of the metal-rich globular cluster NGC 6637. Our color-magnitude diagrams show a predominantly red-clump horizontal branch morphology with hints of a blue horizontal branch extension as seen in NGC 6388 and NGC 6441. We discovered at least four new long-period variable stars in addition to recovering the nine variable stars already discovered. We discuss the cluster membership probabilities of the variables, and present their light curves. This work was funded by a grant from the NSF.

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Bulletin of the American Astronomical Society, 35#5
© 2003. The American Astronomical Soceity.