On Io's 2.788-micron band: Origin by SO2 or H2O?

Details On Io's 2.788-micron band: Origin by SO2 or H2O? On Io's 2.788-micron band: Origin by SO2 or H2O?

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994icar..107..418n&link_type=abstract

Icarus, vol. 107, no. 2, p. 418-421

Other

7

Absorption Spectra, Abundance, Chemical Composition, Infrared Spectra, Io, Sulfur Dioxides, Water, Frost, Satellite Surfaces, Spectral Reflectance, Spectrum Analysis, Jupiter, Satellites, Io, Water, Sulfur Dioxide, Laboratory Studies, Absorption, Spectra, Reflectance, Composition, Frost, Comparison, Ice

Scientific paper

Laboratory reflectance spectra of SO2 frost and ice and thin H2O frost show that the recently reported band at 2.788 microns in Io's disk-integrated spectrum can be qualitatively explained by the presence of solid SO2 on Io's surface. However, the reported width of the Io band is too great to be explained by SO2 frost or ice alone. Lab spectra presented here, and other data cited here, show clearly that solid SO2 has a strong band at 2.789 microns, and that Io should have such a band. These results do not support the claim of Bregman et al. that H2O is the primary cause of the Io band.

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