On Io's 2.788-μm Band: Origin by SO 2 or H 2O?
Abstract
Laboratory reflectance spectra of SO 2 frost and ice and thin H 2O frost show that the recently reported band at 2.788 μm in Io's disk-integrated spectrum (J. Bregman et al., 1993, Bull. Am. Astron. Soc. 25, 851-852) can be qualitatively explained by the presence of solid SO 2 on Io's surface. However, the reported width of the Io band is too great to be explained by SO 2 frost or ice alone. Lab spectra presented here, and other data cited here, show clearly that solid SO 2 has a strong band at 2.789 μm, and that to should have such a band. These results do not support the claim of Bregman et al. that H 2O is the primary cause of the Io band.
- Publication:
-
Icarus
- Pub Date:
- February 1994
- DOI:
- 10.1006/icar.1994.1034
- Bibcode:
- 1994Icar..107..418N
- Keywords:
-
- 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