Radial Velocity Variable sdO/Bs from SPY - Preliminary Orbits of Three New Short Period Binaries

Details Radial Velocity Variable sdO/Bs from SPY - Preliminary Orbits of Three New Short Period Binaries Radial Velocity Variable sdO/Bs from SPY - Preliminary Orbits of Three New Short Period Binaries

2008-04-08

arxiv.org/abs/0804.1276v1

Proceedings of the 3rd Meeting on Hot Subdwarf Stars and Related Objects, U. Heber, S. Jeffery, Napiwotzki eds. 2008, ASP Conf

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure

Scientific paper

We present new results from follow-up time-resolved spectroscopy of radial velocity variable hot subdwarfs from the SPY project. Medium resolution spectra were taken at the ESO NTT. Preliminary orbital solutions are presented for three single-lined sdO/B binaries. The orbital periods of all binaries are short and the companions are most likely white dwarfs or late main-sequence stars. Follow-up time-resolved spectroscopy is necessary to measure the orbital parameters with higher accuracy. Light curves should be taken in order to search for reflection effects and or eclipses.

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