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Science 18 October 1996:
Vol. 274. no. 5286, pp. 391 - 392
DOI: 10.1126/science.274.5286.391
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Reports

Galileo Plasma Wave Observations in the Io Plasma Torus and Near Io

D. A. Gurnett, W. S. Kurth, A. Roux, S. J. Bolton, C. F. Kennel

The Galileo plasma wave instrument detected jovian radio emissions, narrowband upper hybrid waves, and whistler-mode emissions during the inbound pass through the Io torus. The upper hybrid waves provided an accurate profile of electron density through the Io torus and in the vicinity of Io. These measurements show that the torus density has increased by about a factor of 2 since the Voyager 1 flyby in 1979. A well-defined peak in the electron density was observed in the wake of Io, with densities as high as about 4 × 104 per cubic centimeter.

D. A. Gurnett and W. S. Kurth, Department of Physics and Astronomy, University of Iowa, Iowa City, IA 52242, USA.
A. Roux, Centre d'Etudes des Environnements Terrestre et Planetaires, Universite Versailles Saint Quentin, 10/12 Avenue de l'Europe, 78140 Velizy, France.
S. J. Bolton, Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109, USA.
C. F. Kennel, Office of the Chancellor, University of California, Los Angeles, CA 90095, USA.

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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Galileo Imaging of Atmospheric Emissions from Io.
P. E. Geissler, A. S. McEwen, W. Ip, M. J. Belton, T. V. Johnson, W. H. Smyth, and A. P. Ingersoll (1999)
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