Radio emission from RS CVn binaries. I - VLA survey and period-radio luminosity relationship

Details Radio emission from RS CVn binaries. I - VLA survey and period-radio luminosity relationship Radio emission from RS CVn binaries. I - VLA survey and period-radio luminosity relationship

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90..493m&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 90, March 1985, p. 493-498.

Astronomy and Astrophysics

Astronomy

48

Binary Stars, Radio Emission, Stellar Luminosity, Stellar Rotation, Variable Stars, Dynamo Theory, Nonthermal Radiation, Stellar Magnetic Fields, Stellar Spectrophotometry, Stellar Systems

Scientific paper

A VLA survey of radio emission from 36 close binary stellar systems with RS CVn properties is reported. Eight new sources were detected. A summary of all published reports of radio emission from RS CVn systems is presented. There appears to be a correlation between maximum radio luminosity and rotational period, with a tentative functional form L(R) varies as P to the (-0.7) power. Rapid rotators (periods approximately 2 days) may be underluminous compared with the extrapolated trend from longer-period systems. The luminosity-period correlation probably results from a dynamo mechanism which produces strong magnetic fields and, in turn, enhances the nonthermal radio emission. The decrease in radio luminosity at short periods may be caused by a saturation of energy deposition in the chromosphere, possibly because the surface of the active star has become covered with spotted regions.

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