Close binary EHB stars from SPY

Abstract

We present the results of a radial velocity (RV) survey of 46 subdwarf B (sdB) and 23 helium-rich subdwarf O (He-sdO) stars. We detected 18 (39%) new sdB binary systems, but only one (4%) He-sdO binary. Orbital parameters of nine sdB and sdO binaries, derived from follow-up spectroscopy, are presented. Our results are compared with evolutionary scenarios and previous observational investigations.

To appear in "Extreme Horizontal Branch Stars and Related Objects", Astrophysics and Space Science, Kluver Academic Publishers, edited by P.F.L. Maxted

References in corpus (4)

• The Origin of Subdwarf B Star (I): the Formation Channels
• The origin of sdB stars (II)
• Orbital periods of twenty two subdwarf B stars
• Spectroscopic analysis of sdB stars from the ESO Supernova Ia Progenitor Survey

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