The 2. 5-5. 0 micron spectra of Io - Evidence for H sub 2 S and H sub 2 O frozen in SO sub 2

Journal Article · Mon Jan 01 00:00:00 EST 1990 · Icarus (International Journal of the Solar System); (USA)

DOI:https://doi.org/10.1016/0019-1035(90)90006-U· OSTI ID:6955821

Salama, F; Allamandola, L J; Witteborn, F C; Cruikshank, D P; Sandford, S A ^[1]

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1. NASA, Ames Research Center, Moffett Field, CA (USA)

The present analysis of IR spectra of Io in the 2.5-5.0 micron region with laboratory data on plausible surface ices gives attention to four unidentified features exhibiting spatial and temporal band strength variations; these fall close to the fundamental stretching modes in H{sub 2}S and H{sub 2}O, respectively. It is suggested that the 3.85- and 3.91-micron bands in the Io spectra can be accounted for by the absorption of the S-H stretching vibration in H{sub 2}S clusters and isolated molecules in an SO{sub 2}-dominated ice. The observations resemble the transmission spectra of SO{sub 2} ices that contain about 3 percent H{sub 2}S and 0.1% H{sub 2}O. 28 refs.

• OSTI ID: 6955821
• Journal Information: Icarus (International Journal of the Solar System); (USA), Vol. 83; ISSN 0019-1035
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
JUPITER PLANET
SATELLITES
CHEMICAL COMPOSITION
INFRARED SPECTRA
ABSORPTION SPECTRA
HYDROGEN SULFIDES
SULFUR OXIDES
SURFACES
WATER
CHALCOGENIDES
HYDROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLANETS
SPECTRA
SULFIDES
SULFUR COMPOUNDS
640107* - Astrophysics & Cosmology- Planetary Phenomena