Subdwarf B Binaries from the Edinburgh--Cape Survey

Details Subdwarf B Binaries from the Edinburgh--Cape Survey Subdwarf B Binaries from the Edinburgh--Cape Survey

2004-10-11

arxiv.org/abs/astro-ph/0410263v1

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures, to appear in 14th European Workshop on White Dwarfs, ASP Conference Series, eds. D. Koester, S. Moehler

Scientific paper

We present the first results of a campaign to obtain orbital solutions of subdwarf B (sdB) stars from the Edinburgh-Cape survey. We have obtained blue spectra of 35 sdBs, 20 of which have been observed in more than two epochs. 15 out of the 35 are certain binaries with a few other objects showing radial velocity variations with small amplitude, possibly long period sdB binaries. We have secured the orbital parameters for 2 of the 15 systems and narrowed down the orbits of another one to a small range of periods. These preliminary results only use data taken up to December 2003.

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