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Ion partitioning in the hot Io torus - The influence of S2 outgassingAn alternative time-independent model of the ion partitioning in the hot Io torus is proposed which introduces the ratio of sulfur to oxygen in the neutral source as a free parameter. Measurements of the ion abundances in the torus plasma are presented and discussed, noting some ambiguities and identifying the features that are well established. Physical processes important to the understanding of the ion partitioning calculation are reviewed. The results of the model are discussed in the context of observational constraints, and spectroscopic constraints are discussed. It is concluded that a bimodal source model, together with a small percentage of hot electrons and a relatively short diffusion time scale, can account for the principal observational features without invoking significant time variability. In particular, the O III deficiency observed in 1981 can be obtained in a model that produces other aspects of the torus ion partitioning measured during the Voyager 1 encounter.
Document ID
19860039643
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Moreno, M. A.
(California Univ. Los Angeles, CA, United States)
Newman, W. I.
(California Univ. Los Angeles, CA, United States)
Kivelson, M. G.
(California, University Los Angeles, United States)
Date Acquired
August 12, 2013
Publication Date
December 1, 1985
Publication Information
Publication: Journal of Geophysical Research
Volume: 90
ISSN: 0148-0227
Subject Category
Lunar And Planetary Exploration
Accession Number
86A24381
Funding Number(s)
CONTRACT_GRANT: NSG-7295
Distribution Limits
Public
Copyright
Other

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