Astron. Astrophys. Suppl. Ser.
Volume 120, Number 1, November II 1996
|Page(s)||83 - 88|
|Published online||15 November 1996|
CCD photometry of variable stars in the globular cluster NGC 288
Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland e-mail: firstname.lastname@example.org
Accepted: 5 April 1996
The central part of the globular cluster NGC 288 was surveyed in a search for short-period variable stars. We obtained 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.
Key words: globular clusters: individual: NGC 288 / star: variables: other / HR diagram / blue stragglers / stars: horizontal-branch
© European Southern Observatory (ESO), 1996