Close binary EHB stars from SPY

被引：0
作者：
R. Napiwotzki
C.A. Karl
T. Lisker
U. Heber
N. Christlieb
D. Reimers
G. Nelemans
D. Homeier
机构：
[1] Dr. Remeis-Sternwarte,Institute of Astronomy
[2] Universität Erlangen-Nürnberg,Department of Physics & Astronomy
[3] Hamburger Sternwarte,undefined
[4] Universität Hamburg,undefined
[5] University of Cambridge,undefined
[6] University of Georgia,undefined
来源：
Astrophysics and Space Science | 2004年 / 291卷
关键词：
stars:; horizontal branch; stars:; evolution; stars:; binaries;
D O I：
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中图分类号：
学科分类号：
摘要：
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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页码：321 / 328
页数：7
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