Physics
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990angeo...8..725e&link_type=abstract
Annales Geophysicae (ISSN 0992-7689), vol. 8, Nov. 1990, p. 725-731. Research supported by the U.S. - Israel Binational Science
Physics
18
Planetary Magnetospheres, Plasma Chemistry, Plasma Composition, Saturn Atmosphere, Water, Hydrogen Atoms, Planetary Rings, Plasma Temperature, Spatial Distribution
Scientific paper
The paper deals with the question of the composition and spatial distribution of water group plasma in the magnetosphere of Saturn. It is suggested that the problem of the coexistence of neutral atomic hydrogen and such a plasma can be resolved if the dominant ion is taken to be H2O(+) or H3O(+). It is also suggested that this ion may provide a means of radiative cooling of the inner magnetosphere plasma which is possibly easier to realize than transport of nitrogen from Titan. As a source for this plasma in the region inward of the icy satellites, the ring atmosphere is suggested. The depleted plasma density in the domain between the Dione-Tethys torus and the ring plane crossing of Voyager may provide an explanation for the survival of the E-ring. Data are presented which indicate that H2O(+) or H3O(+) is also a favored candidate in the outer magnetosphere and that it can diffuse without loss through the hot electron gas.
Eviatar Aharon
Richardson John D.
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