MHD oscillations in the solar spike radiation

Details MHD oscillations in the solar spike radiation MHD oscillations in the solar spike radiation

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991acaps..11..269z&link_type=abstract

(Acta Astrophysica Sinica, vol. 11, no. 3, 1991, p. 269-274) Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 15, Dec.

Astronomy and Astrophysics

Astrophysics

Magnetoacoustic Waves, Magnetohydrodynamic Waves, Plasma Oscillations, Solar Radio Emission, Microwave Emission, Solar Magnetic Field, Wave Propagation

Scientific paper

The observed 1.4-1.6 s quasi-periodic oscillations in the spike radiation of the microwave outburst of May 16, 1981 are analyzed in terms of MHD waves. It is pointed out that the fast magnetoacoustic waves ('sausage' mode) propagating inside and outside a loop can modulate the magnetic field and the pitch angle distribution of the electron beams in the source region. The growth rate of electron-cyclotron-maser instability is then affected to give rise to the quasi-periodic oscillations. Quantitative estimates of relevant physical parameters are given.

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