Organics and other molecules in the surfaces of Callisto and Ganymede
Science
By: T. B. McCord, R. W. Carlson, W. D. Smythe, G. B. Hansen, R. N. Clark, C. A. Hibbitts, F. P. Fanale, J. C. Granahan, M. Segura, D. L. Matson, T. V. Johnson, and P. D. Martin
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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.
Suggested Citation
McCord, T.B., Carlson, R.W., Smythe, W.D., Hansen, G.B., Clark, R.N., Hibbitts, C.A., Fanale, F.P., Granahan, J.C., Segura, M., Matson, D.L., Johnson, T.V., Martin, P.D., 1997, Organics and other molecules in the surfaces of Callisto and Ganymede: Science, v. 278, no. 5336, p. 271-275, https://doi.org/10.1126/science.278.5336.271.
| 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 |