Flare Energy Release and Electron Acceleration to Relativistic Energies by Quasi-Stationary Electric Fields in the Lower Atmosphere of the Sun

Resumo

The characteristics of electron acceleration to relativistic energies by sub-Dreicer quasi-stationary electric fields under the conditions of the lower atmosphere of the Sun are considered. The proposed model makes it possible to explain the spatial location of hard X-ray, optical, and gyrosynchrotron sources in the chromosphere/photosphere observed during limb solar flares. Possible mechanisms of electric field generation in the lower atmosphere are discussed.