Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004assl..305..149r&link_type=abstract
Astrobiology: Future Perspectives, by Ehrenfreund et al., Leiden Observatory, The Netherlands ASTROPHYSICS AND SPACE SCIENCE LIB
Astronomy and Astrophysics
Astrophysics
2
Scientific paper
Interpretations of telescopic observations show that H2O ice is ubiquitous on surfaces throughout many regions of the outer Solar System. Additionally, carbon-bearing molecular material is emerging as a major component of in the outer Solar System, where it appears entrained in H2O ice on comets and many planetary satellites, and in the more volatile N2 ice on Triton and Pluto. Complex macromolecular carbon, long known in carbonaceous meteorites, appears to be a notable component of comets, planetary satellites, and small trans-Neptunian bodies. Some of this material may be retained from the solar nebula, but some of it originates in the surface ices (and in a few cases, in the tenuous atmospheres) through energetic processing by uv radiation, cosmic rays, and magnetospheric particles. Laboratory studies of the reflectance properties and chemical reactions associated with C-, H, and N-bearing precursor gases and ices show that the stable residues created exhibit a range of coloration at visual and near-infrared wavelengths. Modeling of the telescopic observations using these residues suggest they are capable of giving rise to the observed variable red color of many surfaces in the outer Solar System.
Cruikshank Dale P.
Roush Ted L.
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