Ray tracing in the Io plasma torus - Application to the PRA observations during Voyager 1's closest approach

Details Ray tracing in the Io plasma torus - Application to the PRA observations during Voyager 1's closest approach Ray tracing in the Io plasma torus - Application to the PRA observations during Voyager 1's closest approach

Sep 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.8523l&link_type=abstract

Journal of Geophysical Research, vol. 86, Sept. 30, 1981, p. 8523-8528. Research supported by the Centre National d'Etudes Spat

Astronomy and Astrophysics

Astronomy

15

Io, Jupiter (Planet), Planetary Radiation, Plasma-Electromagnetic Interaction, Radio Astronomy, Ray Tracing, Voyager 1 Spacecraft, Gyrofrequency, Low Frequencies, Radio Spectra, Radio Transmission, Satellite Atmospheres, Jupiter, Satellites, Io, Plasma Torus, Ray Tracing, Pra, Voyager 1, Planetary Radio Astronomy Experiment, Observations, Computer Techniques, Simulations, Radio Waves, Electrons, Density, Models, Hypotheses, Anomalies, Dynamics, Spectrum, Emissions, Source Medium, Frequencies, Refraction, Di

Scientific paper

An attempt is made to simulate propagation of the low-frequency radio waves in the vicinity of the Io plasma torus near Jupiter. In absence of a definitive and detailed electron density model for this torus, a number of minimal hypotheses were used. Nevertheless, the anomalous radio dynamic spectrum observed during the day of Voyager 1's closest approach could agree with an emission source situated around the planet in the southern hemisphere and related to the local gyrofrequency. The major conclusion is that the entire low frequency (up to a few megahertz) dynamic radio spectrum of Jupiter could be modified by refraction inside and around the Io torus. The magnitude of the effects depends on the location of the source and on the plasma parameters distribution inside the torus.

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