Magnetohydrodynamic waves and particle acceleration in a coronal loop

Details Magnetohydrodynamic waves and particle acceleration in a coronal loop Magnetohydrodynamic waves and particle acceleration in a coronal loop

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...336.1059d&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 336, Jan. 15, 1989, p. 1059-1072.

Astronomy and Astrophysics

Astrophysics

11

Coronal Loops, Magnetohydrodynamic Waves, Particle Acceleration, Solar Corona, Magnetic Field Reconnection, Magnetohydrodynamic Turbulence, Microwave Spectra, Solar Flares, Solar Oscillations, Solar X-Rays

Scientific paper

A model is presented for the acceleration of electrons in a flaring solar coronal loop. It is suggested that the primary energy release event in the flare establishes a spectrum of MHD waves within the loop which accelerate electrons by wave-particle resonant interactions. The nature of the MHD oscillations are described and numerical and analytic solution of the dispersion relation are examined. It is found that the behavior of a particle depends on whether or not it is in resonance with the wave spectrum. Resonant particles follow chaotic trajectories and can diffuse in velocity space between wave effective potentials, thereby gaining energy.

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