Zusammenfassung
We use thermochemical equilibrium calculations to show that SO is
expected in volcanic gases erupted on Io, and derive the range of
temperatures, pressures, and elemental compositions that provide
the observed SO/SO2 ratio of 3-10% in Io's atmosphere. Our predictions
could be tested during the Galileo Europa Mission (GEM), by Earth-based
and Hubble Space Telescope observations in the millimeter and UV
regions, or by a mass spectrometer and/or infrared spectrometer on
an Io Volcanic Observer mission. (C) 1998 Academic Press.
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