Computer Science – Emerging Technologies
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ssrv...56...93w&link_type=abstract
(Analysis of samples from solar system bodies with emphasis on existing and emerging technologies; Proceedings of the Internatio
Computer Science
Emerging Technologies
1
Comets, Evolution (Development), Organic Compounds, Surface Properties, Astronomical Models, Comet Nuclei, Cosmic Dust, Cosmic Rays, Comets, Comet Nuclei, Structure, Evolution, Surface, Dust, Halos, Parameters, Crust, Radiation Effects, Irradiation, Thermal Effects, Heating, Volatiles, Refractory Material, Seasonal Variation, Diagrams, Halley, Kerogen, Outgassing, Craters, Evaporation, Erosion, Regolith, Impact Effects, Gardening
Scientific paper
Comets with a high content of organics and light molecules are expected under cosmic radiation to gain a relatively unreactive crust and less volatile material to some 10 m deep. Interstellar dust impacts act to loosen and turn over about 1 cm of the surface. This paper discusses how far this accords with observations of cometary dust halos and new versus old comets. Two key material properties have emerged from recent studies: (1) the source of cometary volatiles is not ice in the sense of material with a single sublimation energy, and (2) the particulates are not simply mineral dust but include much organic material, some of which undergoes chemical processing and exchanges with the gaseous environment.
Wallis Max K.
Wickramasinghe Chandra N.
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