Effect of a self-induced electric field on the electron beam kinetics and resulting hard X-ray and microwave emissions in flares

Details Effect of a self-induced electric field on the electron beam kinetics and resulting hard X-ray and microwave emissions in flares Effect of a self-induced electric field on the electron beam kinetics and resulting hard X-ray and microwave emissions in flares

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ge%26ae..51.1029z&link_type=abstract

Geomagnetism and Aeronomy, Volume 51, Issue 8, pp.1029-1040

Computer Science

Scientific paper

The kinetics of beam electron precipitation from the top of a loop into the solar atmosphere with density gradients and an increasing magnetic field have been generally described. The Fokker-Planck equations are solved with regard to Coulomb collisions and the effect of the electric field induced by this beam. The photon spectra and polarization degree in hard X-ray (10-300 keV) and microwave (1-80 GHz) emissions are simulated under different assumptions regarding the beam electron distribution function. The simulation results are compared with the flare observations on March 10, 2001, and July 23, 2002, visible at different position angles. It has been indicated that the coincidence of the theoretical photon spectra with simultaneous observations of the hard X-ray and microwave emissions of these flares is the best for models that not only take into account collisions, but also the electric field induced by electron fluxes propagating in flare loops with very weakly or moderately converging magnetic fields.

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