Computer Science
Scientific paper
Nov 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.500..513s&link_type=abstract
In: Proceedings of Asteroids, Comets, Meteors - ACM 2002. International Conference, 29 July - 2 August 2002, Berlin, Germany. Ed
Computer Science
Asteroids, Water, Hydroxyl, Ir Spectroscopy
Scientific paper
Chemical trapping of solar wind protons and formation of OH--groups near the surfaces of regolith particles on atmosphereless celestial bodies can result in absorption band near 3 μm in their reflectance spectra. Theoretical simulation of the band shows that it may exceed in depth 3-μm bands found with low-resolution spectroscopy. The shape, width, and position of solar-wind-induced 3-μm band may resemble those observed in high-resolution spectra of asteroids and H2O- and OH--containing minerals. Yet, 3-μm absorption of Ceres and Pallas is found to be deep enough to assign it to hydrated minerals. To prove the presence of H2O-molecules, detection of 3- or 1.4-μm band should be accompanied by high-resolution observation of 2-μm band which can be distinguished from that of orthopyroxene by the shape and width.
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