INTERPRETATION OF SOLAR MICROWAVE-C TYPE BURST SPECTRA IN TERMS OF MAGNETIC NONHOMOGENEITY

The solar radio spectra of the gyro-synchrotron radiation without abso rption from mildly relativistic non-thermal electron have been present ed using the model with the spherical symmetric nonhomogeneity. These spectra have the following features: (i) Twists and turns of the spect ra, which appear at the joint between the medium and high frequencies. (ii) Flux density drop at the lower frequencies. Even if there are no absorption in the radio sources, flux density drop at the lower frequ encies is still present because of magnetic nonhomogeneity. (iii) Thes e theoretical spectra belong to C type. This provides us a new interpr etation for the observed solar burst C type spectra.