Multiply reflected standing Alfven waves in the Io torus - Pioneer 10 observations

Details Multiply reflected standing Alfven waves in the Io torus - Pioneer 10 observations Multiply reflected standing Alfven waves in the Io torus - Pioneer 10 observations

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981georl...8.1281w&link_type=abstract

Geophysical Research Letters, vol. 8, Dec. 1981, p. 1281-1284.

Physics

23

Io, Magnetohydrodynamic Waves, Pioneer 10 Space Probe, Plasma-Electromagnetic Interaction, Satellite Atmospheres, Standing Waves, Electron Density Profiles, Interplanetary Magnetic Fields, Plasma Density, Toroidal Plasmas, Voyager 1 Spacecraft, Jupiter, Satellites, Io, Toruses, Alfven Waves, Pioneer 10, Electrons, Observations, Magnetic Effects, Perturbations, Density, Diagrams, Data, Comparisons, Magnetic Fields

Scientific paper

Observations from the Voyager 1 pass by the Io flux tube strongly suggest that large amplitude standing Alfven waves are generated as Jovian plasma flows past Io. It has recently been proposed by Gurnett and Goertz (1981) that this Io generated standing Alfven wave system extends an appreciable way around the Io L-shell. Observations are presented here of magnetic perturbations found in the Pioneer 10 record as it crossed the Io L-shell. The field perturbations are found to be qualitatively consistent with the passage of the spacecraft through a standing Alfven wave pattern. The observations suggest an Alfven Mach number of 0.03, which is 1/5 the value inferred from Voyager 1 observations. This implies a lower plasma density at the time of the flyby of Pioneer 10.

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