Title:
 

Geometrical aspect of the energy transfer in the solar flares

 
Authors:
 

R. Falewicz, P. Rudawy, and M. Siarkowski

 
Abstract:
 
Hard X-ray emission of the solar flares come usually from two or more compact sources, interpreted as regions of precipitation of non-thermal electrons propagating along the legs of the flaring magnetic loops. The hard X-ray sources show often asymmetry of the emitted fluxes and the brighter source is often located in a region of the weaker photospheric magnetic field.

A simple interpretation of this phenomenon assumes that a slower convergence of magnetic field lines in a loop's leg with a weaker magnetic field allows more electrons to reach the chromosphere. In this paper we study in detail effects of the asymmetry of the localization of the primary energy source. In such a case the footpoint located closer to the energy source can be brighter in hard X-ray independently on the strength of the underlying magnetic field. We present hear also an example of a flare in which electron acceleration site is clearly located asymmetrically, near one of the footpoints, at the place where two magnetic loops interact.

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