Nonlinear generation of the FP radiation upstream of planetary bow shocks

Details Nonlinear generation of the FP radiation upstream of planetary bow shocks Nonlinear generation of the FP radiation upstream of planetary bow shocks

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987stin...8728489c&link_type=abstract

Prepared for presentation at the AGU Chapman Conference on Plasma Waves and Instabilities in Magnetospheres and at Comets, Senda

Astronomy and Astrophysics

Astronomy

Bow Waves, Nonlinearity, Planetary Radiation, Shock Waves, Wave Propagation, Coherent Radiation, Decay, Electron Plasma, Fusion, Radio Astronomy, Stability

Scientific paper

The generation mechanism of the fundamental radiation upstream of planetary bow shocks is studied. It is shown that intense electron plasma waves can generate coherent radiation near the fundamental electron plasma frequency through the following parametric processes: (1) electromagnetic decay/fusion instabilities; (2) double electromagnetic decay/fusion instabilities; and, (3) electromagnetic oscillating two-stream instabilities. Calculation of the nonlinear growth rate and threshold, using the spacecraft data, indicates that these electromagnetic parametric instabilities are likely sources of the fp radiation in the foreshock region.

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