The trap-plus-precipitation model of hard X-ray emission in solar flares

Details The trap-plus-precipitation model of hard X-ray emission in solar flares The trap-plus-precipitation model of hard X-ray emission in solar flares

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...230..213m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 230, no. 1, April 1990, p. 213-219.

Astronomy and Astrophysics

Astrophysics

13

Magnetohydrodynamic Stability, Solar Flares, Solar X-Rays, Fokker-Planck Equation, Trapped Particles, Wave Interaction

Scientific paper

The trap model calculations of Melrose and Brown (1976) and MacKinnon (1988) are extended here to the case in which electrons are injected isotropically into the trap. Simple expressions are derived for the precipitation rate F and the ratio R of coronal to thick-target hard X-ray emission. F and R are also computed numerically, allowing for the effects of collisional pitch angle diffusion. It is found, under quite general conditions, that F is considerably greater and R correspondingly smaller in the case of isotropic acceleration than in the case of acceleration perpendicular to the magnetic field. The implications of these results are discussed in the light of recent hard and soft X-ray observations.

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