INTERFEROMETER OBSERVATIONS OF RS CANUM-VENATICORUM BINARIES

We present radio flux measurements at 5 GHz for a sample of RS CVn-typ e chromospherically active binary systems made from 1988 to 1992 using the NRAL broad-band interferometer (BBI). The derived radio luminosit ies are consistent with previous observations but show that radio flar ing is a common feature which will affect the results of rotation-acti vity studies. The mean brightness temperature for our sample, assuming a radio source size equal to twice the radius of the active stellar c omponent, is consistent with a gyrosynchrotron emission process from m ildly relativistic electrons.