Other
Scientific paper
Feb 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93..823b&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Feb. 1, 1988, p. 823-836.
Other
18
Charge Exchange, Cold Plasmas, Io, Ionic Diffusion, Plasma Probes, Astronomical Models, Positive Ions, Sulfur Oxides, Toroidal Plasmas, Jupiter, Satellites, Io, Models, Ions, Diffusion, Charge, Plasma Torus, Parameters, Sulfur, Sulfur Monoxide, Oxygen, Sulfur Dioxide, Interaction, Density, Clouds, Source, Charged Particles, Neutral Particles, Spectra, Boundaries, Structure, Collisions, Calculations, Partitioning, Analysis, Voyager 1 Mission, Spacecraft Observations
Scientific paper
A comprehensive analytic model of radial diffusion in the cold Io torus is developed. The model involves a generalized molecular cloud theory of SO2 and its dissociation fragments SO, O2, S, and O, which are formed at a relatively large rate by solar UV photodissociation of SO2. The key component of the new theory is SO, which can react with S(+) through a near-resonant charge exchange process that is exothermic. This provides a mechanism for the rapid depletion of singly ionized sulfur in the cold torus and can account for the large decrease in the total flux tube content inward of Io's orbit. The model is used to demonstrate quantitatively the effects of radial diffusion in a charge exchange environment that acts as a combined source and sink for ions in various charge states. A detailed quantitative explanation for the O(2+) component of the cold torus is given, and insight is derived into the workings of the so-called plasma 'ribbon'.
Barbosa Domingos
Moreno Miguel A.
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