A Triggering of Solar Flare by Magnetosonic Waves in a Neutral Sheet Plasma

Abstract

A theoroetical model of the triggering of a solar flare by magnetosonic waves in a neutral sheet plasma is discussed. It is shown that the ponderomotive force due to the magnetosonic waves strongly excites the plamsa convection flow in the magnetic neutral sheet which in turn enhances the tearing instability. The system of basic equations for the tearing mode, including the time-averaged nonlinear effects due to the growth time of the instability is shortened to about 100 s for reasonable magnetosonic wave intensity.