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Subdwarf B Binaries from the Edinburgh--Cape Survey

L. Morales-Rueda·P. F. L. Maxted·T. R. Marsh·D. Kilkenny·D. O'Donoghue
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Abstract

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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L. Morales-Rueda, P. F. L. Maxted, T. R. Marsh, D. Kilkenny, D. O'Donoghue. 2004-10-11. Subdwarf B Binaries from the Edinburgh--Cape Survey. https://arxiv.org/abs/astro-ph/0410263

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