Pulsations of type IV solar radio emission - The bounce-resonance effects

Details Pulsations of type IV solar radio emission - The bounce-resonance effects Pulsations of type IV solar radio emission - The bounce-resonance effects

Jun 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978soph...58..165m&link_type=abstract

Solar Physics, vol. 58, June 1978, p. 165-179.

Physics

45

Magnetohydrodynamic Waves, Plasma Resonance, Plasma-Particle Interactions, Pulsed Radiation, Type 4 Bursts, Wave Interaction, Fine Structure, Magnetically Trapped Particles, Plasma Oscillations, Solar Corona, Solar Magnetic Field, Solar Physics

Scientific paper

The possibility is considered that bounce-resonant interaction between MHD waves and fast particles may compensate the emissive damping of oscillations in the source of type IV radio emission. A mechanism for intensity modulation of type IV radio bursts is proposed which involves the formation of a 'magnetic tube' containing dense plasma in a high region of the corona, MHD oscillations of the tube, and bounce-resonant interaction between the MHD waves and high-energy particles trapped by a magnetic arch in the high corona. It is shown that a correct interpretation of the fine structure of type IV solar radio emission requires an investigation of the role of low-frequency plasma instabilities in coronal magnetic traps.

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