Kaspar von Braun and Mario Mateo 2002 The Astronomical Journal 123 279 doi:10.1086/324641
Kaspar von Braun1 and Mario Mateo1
Show affiliationsWe report on the discovery and analysis of 14 short-period variable stars in the field of the southern globular cluster NGC 3201, located within roughly 2 mag on either side of the main-sequence turnoff. Eleven of these variable stars are eclipsing binaries, one is an RR Lyrae, and two are thus far unclassified systems. Among the eclipsing binary stars, nine are of the W Ursae Majoris (W UMa) type, one an Algol (EA) system, and one a detached system. Using spectroscopic follow-up observations, as well as analysis of the variables' locations in the color-magnitude diagram of the cluster, we find that only one variable star (a W UMa type blue straggler) is actually a member of NGC 3201. We present the phased photometry light curves for all the variable star systems, as well as their locations in the field of view and in the color-magnitude diagram.
binaries: eclipsing; blue stragglers; dust, extinction; globular clusters: individual (NGC 3201)
Issue 1 (2002 January)
Received 2001 August 23, accepted for publication 2001 September 24
Kaspar von Braun and Mario Mateo 2002 The Astronomical Journal 123 279
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