Microwave emission from southern contact-binary stars

Details Microwave emission from southern contact-binary stars Microwave emission from southern contact-binary stars

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....106.1656b&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 106, no. 4, p. 1656-1659.

Astronomy and Astrophysics

Astronomy

11

Binary Stars, Radio Spectra, Stellar Coronas, Stellar Luminosity, Stellar Spectra, Dynamo Theory, Microwave Spectra, Stellar Rotation

Scientific paper

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.

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