Current sheets in corona and X-ray sources for flares above the active region 10365

Abstract

The coincidence of current sheets positions obtained from results of numerical MHD simulation for flares May 27, 2003 at 02:53 UT and May 29, 2003 at 00:51 UT with positions of observed X-ray sources confirm the mechanism of solar flare according to which the magnetic energy of the current sheet is released in corona above an active region. To study the magnetic field configuration obtained from 3D MHD simulation, the system of graphic presentation is developed. Magnetic field lines in 3D space have a complex configuration near a current sheet above the active region which can be investigated using the developed system of visualization. The physical meaning of the processes in the current sheet is best demonstrated by the lines in the plane of the current sheet configuration which are tangential to the projections of the magnetic field vectors on this plane. Position of such lines defines the magnetic forces, which create the current sheet and then destroy it, when the system turns into an unstable state. Analysis of magnetic lines in large area above the active region allows make a preliminary conclusion about existence of the magnetic lines that connect the hard X-ray sources and the current sheet.