Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ap%26ss.144..451p&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 144, no. 1-2, May 1988, p. 451-461. DOE-NASA-supported research.
Astronomy and Astrophysics
Astrophysics
5
Arc Discharges, Io, Plasma Guns, Plasma Jets, Volcanoes, Astronomical Photography, Energy Dissipation, Plasma Sheaths, Satellite Surfaces, Voyager 1 Spacecraft, Voyager 2 Spacecraft
Scientific paper
Volcanic plumes on the Jovian satellite Io may be a visible manifestation of a plasma-arc discharge phenomenon. The amount of power in the plasma arc (about 10 to the 11th W) is not enough to account for all the energy dissipated by the volcanoes. However, once a volcano is initiated by tidal and geologic processes, the dynamics of the volcanic plumes can be influenced by the plasma arcs. As initially pointed out by Gold (1979), plasma arcs are expected because of 10 to the 6th A currents and 400 kV potentials generated by the flow past Io of a torus of relatively dense magnetospheric plasma. Experience with laboratory plasma arcs is utilized to investigate the plume dynamics. The filamentation in the plume of the volcano Prometheus and its cross-sectional shape is quantitatively consistent with theories developed from laboratory observation.
Dessler A. J.
Peratt Anthony L.
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