Close binary EHB stars from SPY

Details Close binary EHB stars from SPY Close binary EHB stars from SPY

2004-01-12

arxiv.org/abs/astro-ph/0401201v1

Astrophys.Space Sci. 291 (2004) 321-328

Astronomy and Astrophysics

Astrophysics

To appear in "Extreme Horizontal Branch Stars and Related Objects", Astrophysics and Space Science, Kluver Academic Publishers

Scientific paper

10.1023/B:ASTR.0000044362.07416.

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.

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