Organics and other molecules in the surfaces of Callisto and Ganymede.
Science
; 278(5336): 271-5, 1997 Oct 10.
Article
em En
| MEDLINE
| ID: mdl-9323203
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(triple bond)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.
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Base de dados:
MEDLINE
Assunto principal:
Enxofre
/
Dióxido de Carbono
/
Júpiter
/
Nitrilas
Idioma:
En
Ano de publicação:
1997
Tipo de documento:
Article