Generation, saturation, and convection of electrostatic waves in Jupiter's shock foot

Details Generation, saturation, and convection of electrostatic waves in Jupiter's shock foot Generation, saturation, and convection of electrostatic waves in Jupiter's shock foot

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.8483m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Aug. 1, 1988, p. 8483-8490.

Physics

3

Electron Energy, Electrostatic Waves, Ion Beams, Jupiter (Planet), Shock Waves, Solar Wind, Planetary Magnetic Fields, Thermal Energy, Two Dimensional Models, Wave Interaction

Scientific paper

In this paper, a model is developed for the analysis of the electrostatic waves produced in the shock foot at Jupiter. It is shown that an ion beam instability involving the ions reflected at the shock ramp and the incoming solar-wind electrons produces waves at the observed frequencies and that saturation via orbit diffusion limits the waves to amplitudes near to what is observed. Results from a two-dimensional model of the reflected beam in the foot indicate that the waves propagate against the solar wind away from the shock ramp and are amplified up to their saturation amplitudes. The saturation results, combined with the electron temperature profile due to wave-particle interactions predicted by quasi-linear theory, reproduce a wave amplitude profile for the shock foot that is in reasonable agreement with the observations.

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