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Paper: Variable Stars in the Globular Cluster Omega Centauri: Multimode Variability of SX Phoenecis Stars in the Central Region
Volume: 135, A Half Century of Stellar Pulsation Interpretations: a Tribute to Arthur N. Cox
Page: 458
Authors: Freyhammer, L. M.; Andersen, M. I.; Petersen, J. O.
Abstract: With a view to applications of SX Phoenicis variables and RR Lyrae stars as tests of stellar models and as standard candles we study the globular cluster Omega Centauri. We use B, V, I data to give information on the physical properties of the stars and to search for low-amplitude oscillations of interest for asteroseismology. In May-June 1995 L.M. Freyhammer obtained about 1500 CCD frames mainly in the central part of Omega Cen, and in March 1996 he obtained about 250 CCD frames. Preliminary results on SX Phoenicis variables in the central region will be presented.
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