Strong electron heat flux modes in Jupiter's foreshock

Details Strong electron heat flux modes in Jupiter's foreshock Strong electron heat flux modes in Jupiter's foreshock

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984georl..11..869m&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 11, Sept. 1984, p. 869-872.

Physics

20

Electron Flux Density, Electron Plasma, Electrostatic Waves, Jupiter Atmosphere, Shock Wave Propagation, Ion Acoustic Waves, Plasma Frequencies, Propagation Modes, Jupiter, Electrons, Heat, Flux, Voyager Missions, Plasma Waves, Ions, Analysis, Bowshock, Oscillations, Frequencies, Doppler Shift, Drift, Acoustic Waves, Plasmas, Velocity, Thermal Effects, Magnetic Effects, Electrostatic Properties, Observations

Scientific paper

Analysis of Voyager plasma wave data from the Jovian foreshock has revealed the existence of a new oscillation with center frequency below fp and typically lying above the upper limit Doppler shift frequency for ion acoustic waves. The properties of these waves are consistent with modes generated by a strong electron heat flux in an unmagnetized plasma. Such modes become unstable when the effective drift velocity exceeds n(cold)/(hot) exp 1/2 times the thermal speed of the hot component. The occasional simultaneous appearance of more than one frequency band is a possible indication of multiple magnetic connection with the shock.

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