MHD oscillations in radio spike radiation observed on May 16, 1981

Details MHD oscillations in radio spike radiation observed on May 16, 1981 MHD oscillations in radio spike radiation observed on May 16, 1981

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990soph..130..151z&link_type=abstract

(Committee of European Radio Astronomers, SNSF, URSI, et al., Workshop on Particle Beams in the Solar Atmosphere, Braunwald, Swi

Physics

15

Magnetohydrodynamic Waves, Plasma Oscillations, Solar Radio Bursts, Magnetic Flux, Periodic Variations, Pitch (Inclination), Solar X-Rays

Scientific paper

Quasi-periodic oscillation characteristics of 1.4-1.6s have been discovered in the spike radiation of the typical microwave outburst observed on May 16, 1981. The observations are analyzed in terms of MHD waves ('sausage' mode) propagating inside and outside a loop. The waves can modulate the magnetic field and the pitch angle distribution of the electron beams in the source region. These affect the growth rates of the ECM instability, and so quasi-periodic oscillations in the spike radiation are generated. In addition, relevant physical parameters were quantitatively estimated.

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