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A new class of absorption feature in Io's near-infrared spectrumA relatively weak IR absorption feature detected at 1200 resolving power in Io at 2.1253 microns does not correspond to any gas- or solid-phase absorption expected on the basis of previously identified Io surface constituents. The source material of the feature appears to be stable and more uniformly distributed in longitude than Io's hot spots. These characteristics imply the feature's participation in a class different from those of other Io absorption spectrum features, thereby potentially serving as a major indicator of Io's atmosphere-surface composition and interactions. Results of laboratory experiments with plausible surface ices are compared with these observations.
Document ID
19910041643
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Trafton, L. M.
(Texas Univ. Austin, TX, United States)
Lester, D. F.
(Texas Univ. Austin, TX, United States)
Ramseyer, T. F.
(Texas, University Austin, United States)
Salama, F.
(Texas Univ. Austin, TX, United States)
Sandford, S. A.
(Texas Univ. Austin, TX, United States)
Allamandola, L. J.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 14, 2013
Publication Date
February 1, 1991
Publication Information
Publication: Icarus
Volume: 89
ISSN: 0019-1035
Subject Category
Lunar And Planetary Exploration
Accession Number
91A26266
Funding Number(s)
CONTRACT_GRANT: NAGW-1477
Distribution Limits
Public
Copyright
Other

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