Microwave emission from southern contact-binary stars

We report the results of high-sensitivity 4.8 GHz observations of four southern contact-binary stars (AE Phe, YY Eri, RW Dor, and V757 Cen) made with the Australia Telescope Compact Array. None of these stars were detected above a 4-sigma level of 0.4 mJy. A comparison of the radio emission properti...

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Bibliographic Details
Published in:The Astronomical journal 1993-10, Vol.106 (4), p.1656-1659
Main Authors: BEASLEY, A. J, BALL, L. T, BUDDING, E, SLEE, O. B, STEWART, R. T
Format: Article
Language:English
Subjects:
Astronomy
Binary and multiple stars
Earth, ocean, space
Exact sciences and technology
Spectroscopic binaries. Close binaries
Stars
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Summary:We report the results of high-sensitivity 4.8 GHz observations of four southern contact-binary stars (AE Phe, YY Eri, RW Dor, and V757 Cen) made with the Australia Telescope Compact Array. None of these stars were detected above a 4-sigma level of 0.4 mJy. A comparison of the radio emission properties of contact binaries (derived from this study and from the literature) to those of short-period RS CVn stars, suggests that a decrease in the dynamo efficiency of binary stars as they approach contact may be required to explain the lower intrinsic radio luminosity of contact binaries. (Author)
ISSN:0004-6256
1538-3881
DOI:10.1086/116754