CCD Photometry of Variable Stars in the Globular Cluster NGC 288

Details CCD Photometry of Variable Stars in the Globular Cluster NGC 288 CCD Photometry of Variable Stars in the Globular Cluster NGC 288

1996-01-11

arxiv.org/abs/astro-ph/9601052v1

Astronomy and Astrophysics

Astrophysics

12 pages including 6 figures, uuencoded postscript file, submitted to A&A

Scientific paper

The central part of the globular cluster NGC 288 was surveyed in a search for short-period variable stars. We obtained the V-band light curves for 4 SX Phe stars and 2 RR Lyrae variables, five of which are new discoveries. All SX Phe stars belong to blue stragglers. We present a color-magnitude diagram including stars from the tip of red giant branch to the level of the main-sequence turnoff. Three likely hot subdwarfs were located on the extension of the blue horizontal branch of the cluster.

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