On the nature of the variable star UNSW-V-760

Details On the nature of the variable star UNSW-V-760 On the nature of the variable star UNSW-V-760

Feb 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011mnras.411..813k&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 411, Issue 2, pp. 813-825.

Astronomy and Astrophysics

Astronomy

1

Stars: Individual: Unsw-V-760, Stars: Variables: General

Scientific paper

The results of multicolour photometric monitoring over several nights of the probable X-ray source UNSW-V-760 are presented. Drawing on both present and past observations, it is shown that the star is multiperiodic and that all the variability can probably be explained by two non-sinusoidal periodicities with periods of 0.276 and 0.198 d. Possible causes (binarity, rotation and oscillation) of the variations are discussed and it is concluded that pulsation must play a role. A classification in the range K1Vke-K3Vke is derived from two low-dispersion spectra. Curiously, the pulsation periods are closer to what is expected for a K giant star, but the amplitudes are two orders of magnitude larger than those seen in K giants.

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