Io's fast sodium: Implications for molecular and atomic atmospheric escape

Details Io's fast sodium: Implications for molecular and atomic atmospheric escape Io's fast sodium: Implications for molecular and atomic atmospheric escape

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994icar..111...31w&link_type=abstract

Icarus (ISSN 0019-1035), vol. 111, no. 1, p. 31-44

Mathematics

28

Emission Spectra, Gas Dissociation, Io, Molecular Interactions, Molecular Ions, Satellite Atmospheres, Sodium, Toroidal Plasmas, Charge Exchange, Elastic Scattering, Image Processing, Jupiter (Planet), Mathematical Models, Monte Carlo Method, Planetary Magnetospheres

Scientific paper

Recent observational evidence for sodium-bearing molecular ions in the Io plasma torus has strong implications for the nature of Io's atmosphere (Schneider et al. 1991). We use a Monte Carlo model of fast-sodium production to analyze high-resolution ground-based images of sodium emission. We find the observations can be explained if a significant fraction of Io's exobase is molecular, possible including a sodium-bearing molecule, Total sodium loss rates from Io imply a collisionally thick atmosphere. Most of the images indicate significant slow-down of the corotating plasma near Io.

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