Coherent anomalous resistivity in the region of electrostatic shocks

Details Coherent anomalous resistivity in the region of electrostatic shocks Coherent anomalous resistivity in the region of electrostatic shocks

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979georl...6..661l&link_type=abstract

Geophysical Research Letters, vol. 6, Aug. 1979, p. 661-663.

Physics

17

Auroral Zones, Electrostatic Waves, Ion Cyclotron Radiation, Plasma Conductivity, Satellite Observation, Shock Wave Propagation, Abnormalities, Ionic Waves, Magnetohydrodynamic Waves, Phase Coherence, Plasma Turbulence

Scientific paper

Anomalous resistivity in a phase-coherent electrostatic ion cyclotron wave in the region of the auroral electrostatic shocks observed by the S3-3 satellite is considered. It is shown that current-driven shocks and anomalous resistivity will be most important above 5,000 km, where the electron drift velocity is maximized and parallel electric fields are possible. A model for the parallel field based on the dissipation of an Alfven wave pulse by current-driven electrostatic ion cyclotron turbulence is presented. In the model, coherent electrostatic ion cyclotron waves lead to anomalous resistivity by electron trapping, producing parallel electric fields greater than 1 mV/m, and may set up the parallel populations necessary to support oblique electrostatic shocks.

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