Close binary EHB stars from SPY: Extreme Horizontal Branch Stars and Related Objects (Guest Editor: P.F.L. Maxted)
Source: Astrophysics and Space Science, Volume 291, Number 3, 2004 , pp. 321-328(8)
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.
Document Type: Research Article
Affiliations: 1: Dr. Remeis-Sternwarte, Universität Erlangen-Nürnberg, Bamberg, Germany., Email: email@example.com 2: Dr. Remeis-Sternwarte, Universität Erlangen-Nürnberg, Bamberg, Germany 3: Hamburger Sternwarte, Universität Hamburg, Hamburg, Germany 4: Institute of Astronomy, University of Cambridge, Cambridge, UK 5: Department of Physics & Astronomy, University of Georgia, Athens, USA
Publication date: January 1, 2004