Orbital periods of the binary sdB stars PG 0940+068 and PG 1247+554 |
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| Authors: | P. F. L. Maxted C. K. J. Moran T. R. Marsh A. A. Gatti |
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| Affiliation: | University of Southampton, Department of Physics &Astronomy, Highfield, Southampton SO17 1BJ; Imperial College of Science Technology and Medicine, Blackett Laboratory, Prince Consort Road, London SW7 2BZ |
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| Abstract: | We have used the radial velocity variations of two sdB stars previously reported to be binaries to establish their orbital periods. They are PG 0940+068 ( P =8.33 d) and PG 1247+554 ( P =0.599 d). The minimum masses of the unseen companions, assuming a mass of 0.5 M⊙ for the sdB stars, are 0.090±0.003 M. for PG 1247+554 and 0.63±0.02 M⊙ for PG 0940+068. The nature of the companions is not constrained further by our data. |
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| Keywords: | binaries: close binaries: spectroscopic stars: individual: PG 0940+068 stars: individual: PG 1247+554 subdwarfs |
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