The plasma radiation of flare kernels

Details The plasma radiation of flare kernels The plasma radiation of flare kernels

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...88..297z&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 88, Oct. 1983, p. 297-313.

Physics

80

Plasma Radiation, Solar Flares, Solar Radio Emission, Solar Wind, Circular Polarization, Distribution Functions, Magnetohydrodynamic Stability, Microwave Emission, Rayleigh Scattering, Solar X-Rays

Scientific paper

The authors offer a coherent plasma-emission mechanism for intense microwave radiation of a flare in the impulsive phase. The radiation arises because of a loss-cone instability of plasma waves near the upper hybrid frequency in the energy release region (flare kernel). Under typical conditions of a flare kernel, conversion of plasma waves into electromagnetic ones causes the radio emission to dominate the second harmonic of the plasma frequency. The radiation is polarized in the extraordinary sense. The Bernstein mode loss-cone instability leads to a zebra-pattern in the microwave radiation. MHD-oscillations of the flare kernel give rise to pulsations of the microwave and hard X-ray emission. The plasma mechanism offers new possibilities of flare plasma diagnostics.

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