SOLAR FLARE MULTIWAVE INVESTIGATIONS AND PHYSICAL MODEL

Abstract. New observations justify the flare scenario predicted by the electrodynamical model based on numerical 3D MHD simulations. X-ray RHESSI measurements show plasma heating above an active region in the place, where current sheet (CS) has been created due to disturbances focusing. The measured plasma parameters above an active region during the flare correspond to plasma heating (T~3 keV) in CS due to magnetic reconnection. Phenix-2 radio telescope measurements show high frequency continuum appearing simultaneously with hard X-ray pulse (t~1min). The radio continuum frequency (1.5 – 15 GHz) corresponds to plasma density obtained from X-ray measurements. CS magnetic field obtained from MHD numerical simulation is in agreement with the observed plasma pressure. The photospheric hard X-ray sources seem to be created by electrons accelerated in the electric field applied along the loop magnetic lines. Applications of solar flare models that used magnetic tubes interaction and magnetic ropes ejection with appearance are also discussed