Particle acceleration in the 1981 April 1 flare

Details Particle acceleration in the 1981 April 1 flare Particle acceleration in the 1981 April 1 flare

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...86..427n&link_type=abstract

(Japan Society for the Promotion of Science and National Science Foundation, U.S.-Japan Seminar on the Recent Advances in the Un

Physics

14

Microwave Spectra, Particle Acceleration, Solar Flares, Solar Spectra, Stellar Spectrophotometry, Electron Energy, Gamma Rays, Relativistic Velocity, Solar X-Rays, Temporal Distribution

Scientific paper

The large microwave burst of 1981 April 1, which was accompanied by both hard X-ray and γ-ray emissions, was analyzed to study the acceleration of particles in the impulsive phase. The analysis suggests the following results. (1) Electrons were accelerated up to energies of several hundred keV in a low loop. On the other hand, electrons were accelerated to relativistic energy without injection of pre-accelerated electrons near the top of a large loop where energetic ions were also probably accelerated. (2) The mechanism for accelerating electrons to relativistic energy and also ions was different from that for accelerating electrons up to energies of several hundred keV and was closely related with upward motion of a flare loop.

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