VLA OBSERVATIONS OF SOLAR ACTIVE REGIONS AT 6-CM AND 20-CM

We present high resolution observations of two active regions at 6 and 20 cm over a period of 5 days, together with H-alpha and photospheric magnetic fields. The large scale emission at 20 cm is associated with the H-alpha plage. In one region the strongest source was over the neutral line, near the tip of an active region filament, which indicates that the emission probably originated in small scale coronal loops. In the second region the peak of the emission was near a well developed sunspot. Neither region showed evidence of large scale loops joining their preceding and following parts. Several other sources were observed at 20 cm; a source associated with an H-alpha plage region crossed by a filament and one associated with a small bipolar region are briefly discussed. The 6 cm emission from a well developed spot showed clearly the characteristics expected from gyroresonance model computations. The detailed shape of the source shows that the magnetic field of the spot was not potential. The sense of the required electric current is the same as that inferred from the analysis of chromospheric observations.