Escape and ionization of atomic oxygen from Io

Details Escape and ionization of atomic oxygen from Io Escape and ionization of atomic oxygen from Io

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...271..865s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 271, Aug. 15, 1983, p. 865-875.

Astronomy and Astrophysics

Astrophysics

33

Atmospheric Ionization, Io, Jupiter Atmosphere, Oxygen Atoms, Clouds, Earth Magnetosphere, Satellite Atmospheres, Space Plasmas, Toroidal Plasmas, Jupiter, Satellites, Io, Escape, Ionization, Oxygen, Distribution, Magnetosphere, Models, Calculations, Plasma, Electrons, Emissions, Intensity, Flux, Mass Loading, Energy, Torus, Diffusion, Radiation, Voyager 2, Production Rates

Scientific paper

Model calculations of the neutral O cloud of Io, based on atom-electron-impact excitation and ionization processes in the plasma torus, are presented. The model is quantitatively anchored to the 6300-A O I emission intensity observations of Brown (1981), and uses a plasma temperature and density structure based on Voyager 1 and 2 and EUV data. Parameters predicted by the model include satellite emission flux = 1.5 x 10 to the 9th/sq cm sec, ion-loading rate = 6.2 x 10 to the 26th ions/sec, O mass-loading rate = 16.6 kg/sec, and O ion-energy input rate = 2.7 x 10 to the 10th W. The spatial morphologies of the parameters are shown. Rough estimates obtained by accounting for a neutral S cloud and plasma-torus charge-exchange reactions include O source flux = 1.2 x 10 to the 10th/sq cm sec, ion-loading rate = 4.0 x 10 to the 27th ions/sec, ion-diffusive-loss time = 200 days, plasma mass-loading rate = 150 kg/sec, satellite mass-loss rate = 270 kg/sec, and maximum ion-energy input = 4 x 10 to the 11th W.

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