Photoelectron excitation of Io's atmosphere

Details Photoelectron excitation of Io's atmosphere Photoelectron excitation of Io's atmosphere

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997adspr..20..301b&link_type=abstract

Advances in Space Research, vol. 20, p. 301

Physics

4

Io, Satellite Atmospheres, Photoelectrons, Sulfur Dioxides, Emission Spectra, Electron Energy, Monte Carlo Method, Neutral Gases, Electron Scattering, Oxygen Atoms, Sulfur

Scientific paper

A Monte Carlo model simulating photoelectrons' energy degradation on Io's SO2 atmosphere is here used to calculate photoelectron production rates for solar minimum conditions. The calculated brightnesses of neutral S and O emissions are found to be three orders of magnitude below those observed by the HST. It is suggested that most of the S- and O-ion emissions are likely produced through the direct collision of electrons with atomic S and O in the upper atmosphere.

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