Computer Science
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990icar...88..172j&link_type=abstract
Icarus (ISSN 0019-1035), vol. 88, Nov. 1990, p. 172-192.
Computer Science
156
Asteroid Belts, Chemical Composition, Hydroxyl Radicals, Silicates, Spectral Signatures, Water Vapor, Planetary Orbits, Solar System, Solar Wind
Scientific paper
A telescopic and laboratory investigation of water distribution among low albedo asteroids in the outer belt, using the 3-micron reflectance absorption of molecular H2O and structural OH ions (coincident with the 3-micron spectral signature of meteorite and asteroid hydrated silicates) shows that 66 percent of the C-class asteroids in the sample have hydrated silicate surfaces. In conjunction with the apparently anhydrous P and D surfaces, this pronounced hydration difference between C-class asteroids and the more distant P and D classes points to an original outer belt asteroid composition of anhydrous silicates, water ice, and complex organic material. Early solar-wind induction heating of protoasteroids, declining in intensity with distance from the sun, is conjectured to have produced the observed diminution of hydrated silicate abundance.
Jones Thomas D.
Lebofsky Larry A.
Lewis John S.
Marley Mark S.
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