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.
@article{arxiv.astro-ph/0410263,
title = {Subdwarf B Binaries from the Edinburgh--Cape Survey},
author = {L. Morales-Rueda and P. F. L. Maxted and T. R. Marsh and D. Kilkenny and D. O'Donoghue},
journal= {arXiv preprint arXiv:astro-ph/0410263},
year = {2007}
}
Comments
4 pages, 4 figures, to appear in 14th European Workshop on White Dwarfs, ASP Conference Series, eds. D. Koester, S. Moehler