A Ground-Based Proper Motion Study of 12 Nearby Globular Clusters

W. Narloch, J. Kaluzny, R. Poleski, M. Rozyczka, W. Pych and I. B. Thompson

We derive relative proper motions of stars in the fields of 12 galactic globular clusters: M12, NGC 6362, M4, M55, M22, NGC 6752, NGC 3201, M30, M10, NGC 362, M5, and 47 Tucanae. We determine membership probabilities for over 446 000 objects, and show that using them is an efficient method for separating members of the cluster from field stars. In particular, membership probabilities of variable stars including RR Lyrae stars, eclipsing binaries, and blue/yellow/red stragglers are determined.

Proceedings of the Polish Astronomical Society, vol. 6, 306-307 (2018)

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