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Absorption bands in the spectrum of IoNear-infrared spectra of Io in the region from 2.8 to 4.2 microns are reported which show distinct absorption features, the most notable at 4.1 microns. Frozen volatiles or atmospheric gases cannot account for these absorptions, nor do they resemble those seen in common silicate rocks. Several candidate substances, most notably nitrate and carbonate salts, show absorption features in this spectral region; the deepest band in the spectrum may be a nitrate absorption. The satellite surface is shown to be anhydrous, as indicated by the absence of the 3-micron bound water band.
Document ID
19790026730
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Cruikshank, D. P.
(Hawaii Univ. Honolulu, HI, United States)
Jones, T. J.
(Hawaii, University Honolulu, Hawaii, United States)
Pilcher, C. B.
(Hawaii Univ. Honolulu, HI, United States)
Date Acquired
August 9, 2013
Publication Date
October 15, 1978
Publication Information
Publication: Astrophysical Journal
Subject Category
Lunar And Planetary Exploration
Accession Number
79A10743
Funding Number(s)
CONTRACT_GRANT: NGL-12-001-057
Distribution Limits
Public
Copyright
Other

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