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Subdwarf B binaries in the Edinburgh-Cape Survey

Record type:

dataset
Creator:
MorMaxMarKil
Publisher:
arXiv
Host:avatar
We give an update of the results of a campaign to obtain orbital solutions of subdwarf B stars from the Edinburgh-Cape survey (Stobie et al. 1997). To date we have obtained blue spectra of 40 subdwarf B stars from the Edinburgh-Cape catalogue using the grating spectrograph at the 1.9m Radcliffe telescope at the South African Astronomical Observatory. We find that 17 out of these 40 are certain binaries with a few other objects showing radial velocity variations of small amplitude. The binary fraction found in our sample, after correcting for our binary detection efficiency, is 48%. We have secured the orbital parameters for 4 of the 17 systems and narrowed down the orbits of another 7 to a small range of periods. To appear in Baltic Astronomy. Proceedings of the Second Meeting on Hot Subdwarf Stars, La Palma, June 2005. Four pages, three figures

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doi.orgarxiv.org

Languages

Makwe

Tags

Astrophysics (astro-ph)FOS: Physical sciencesFOS: Physical sciences

Licenses

Assumed arXiv.org perpetual, non-exclusive license to distribute this article for submissions made before January 2004http://arxiv.org/licenses/assumed-1991-2003/

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