Acceleration of runaway electrons and Joule heating in solar flares

Details Acceleration of runaway electrons and Joule heating in solar flares Acceleration of runaway electrons and Joule heating in solar flares

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...293..584h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 293, June 15, 1985, p. 584-594. Previously announced in STAR as N84-25583.

Physics

Plasma Physics

154

Electron Acceleration, Electron Runaway (Plasma Physics), Ohmic Dissipation, Resistance Heating, Solar Flares, Magnetic Flux, Microwave Emission, Plasma Temperature, Solar Magnetic Field, Solar X-Rays

Scientific paper

The electric field acceleration of electrons out of a thermal plasma and the simultaneous Joule heating of the plasma are studied. Acceleration and heating timescales are derived and compared, and upper limits are obtained on the acceleration volume and the rate at which electrons can be accelerated. These upper limits, determined by the maximum magnetic field strength observed in flaring regions, place stringent restrictions upon the acceleration process. The role of the plasma resistivity in these processes is examined, and possible sources of anomalous resistivity are summarized. The implications of these results for the microwave and hard X-ray emission from solar flares are examined.

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