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Organics and other molecules in the surfaces of Callisto and Ganymede

Science

By:
, , , , , , , , , , , and
DOI: 10.1126/science.278.5336.271

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Abstract

Five absorption features are reported at wavelengths of 3.4, 3.88, 4.05, 4.25, and 4.57 micrometers in the surface materials of the Galilean satellites Callisto and Ganymede from analysis of reflectance spectra returned by the Galileo mission near-infrared mapping spectrometer. Candidate materials include CO2, organic materials (such as tholins containing C???N and C-H), SO2, and compounds containing an SH-functional group; CO2, SO2, and perhaps cyanogen [(CN)2] may be present within the surface material itself as collections of a few molecules each. The spectra indicate that the primary surface constituents are water ice and hydrated minerals.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Organics and other molecules in the surfaces of Callisto and Ganymede
Series title:
Science
DOI:
10.1126/science.278.5336.271
Volume
278
Issue:
5336
Year Published:
1997
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
271
Last page:
275
Number of Pages:
5