Gyrosynchrotron Model of Microwave Sources Associated with the Magnetic Field Neutral Line

Abstract

The main properties of microwave radiation sources over the magnetic field neutral line, which follow from the assumption of a gyrosynchrotron mechanism of radio emission, have been considered. As an example, the strong event of September 3–5, 2017, which was followed by a number of powerful flares, has been analyzed. A possible reason for the continuous electron acceleration of the gyrosynchrotron mechanism is discussed, along with the conditions under which the gyrosynchrotron mechanism of microwave radiation plays no significant role in the origin of sources above the neutral line.