Microflares initiated by five-minute photospheric oscillations

Appearance of microflares in the solar corona during five-minute oscillations in the photosphericconvection rate is considered. Photospheric-convection rate oscillations result in the oscillations of electric current flowing along the loop and the electric-current oscillations in turn lead to generation of inductive electric field which accelerates the particles. Maximum flows of accelerated particles emerge near the apex of the coronal magnetic loop, where the ratio of the accelerating electric field to the Dreicer field is maximal. The heating function due to evaporation of the hot chromospheric plasma, which results from interaction between the accelerated particles and chromospheric bases of the loop is calculated. The microflare energy and the quasi-stationary plasma temperature in a loop as well as the dependence of the latter on the rate amplitude in five-minute photospheric oscillations, are also determined.