Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.208..865s&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 208, June 15, 1984, p. 865-871.
Astronomy and Astrophysics
Astronomy
22
Eclipsing Binary Stars, Radio Stars, Southern Sky, Variable Stars, Brightness Temperature, Centimeter Waves, Radiant Flux Density, Stellar Models
Scientific paper
Observations with the Parkes 64-m telescope in 1982 and 1983 have resulted in the detection of eight new southern readio binaries, six of which are believed to be RS CVn binaries. The peak 5-GHz luminosities of three of these stars exceed 10 to the 10th W/Hz sr and equal the extreme values measured for one or two northern binaries. For a source diameter equal to that of the cooler active giant or sub-giant component, the derived peak brightness temperatures of around 10 to the 10th K for two stars are probably inconsistent with the incoherent synchrotron emission mechanism, especially if the emission is strongly circularly polarized. An electron-cyclotron maser appears to be a possible alternative emission mechanism, but there may be difficulties with such a model if the source is as large as the diameter of the active component.
Haynes Raymond F.
Slee Owen Bruce
Wright Alan E.
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