Theory of radio pulsations in coronal loops

Details Theory of radio pulsations in coronal loops Theory of radio pulsations in coronal loops

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987soph..111..113a&link_type=abstract

(Observatoire de Paris, CNRS, CNES, et al., CESRA Workshop on Particle Acceleration and Trapping in Solar Flares, 2nd, Aubigny-s

Physics

157

Coronal Loops, Magnetohydrodynamic Stability, Solar Oscillations, Solar Radio Emission, Fine Structure, Magnetic Flux, Magnetohydrodynamic Waves, Particle Acceleration, Solar X-Rays

Scientific paper

"Pulsations" include a wide range of phenomena from strictly sinusoidal oscillations up to quasi-periodic fine structures, observed in the radio, microwave and X-ray frequency range. The various versions of pulsation models are reviewed and classified in three groups according to their driver mechanisms: (1) Magnetic flux tube oscillations (the emissivity of trapped particles is modulated by a standing or propagating MHD wave), (2) cyclic self-organizing systems of plasma instabilities (wave-particle, wave-wave interactions), and (3) modulation of acceleration (acceleration/injection of particles into the source). Observational references illustrate the applicability of the models. In conclusion, discrimination criteria of models are discussed, in order to give a key for interpretation of observations.

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