Other
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21010802v&link_type=abstract
American Astronomical Society Meeting 210, #108.02; Bulletin of the American Astronomical Society, Vol. 39, p.233
Other
Scientific paper
Absorption features near 3 µm in the reflectance spectra of asteroids are indicative of minerals containing water, ammonium-bearing phyllosilicates, or hydroxyl radicals[1]. The cases can be distinguished from one-another by the shapes of the absorption bands[2]. The quantity of hydrated material can be determined from the ratio of the reflectances at 2.9 µm and 2.5 µm[3,4,5]. We present observations of outer-belt asteroid reflectance spectra (2.2-4.0 µm) taken with the Spex [6] medium resolution spectrograph at the NASA Infrared Telescope Facility.
References: [1] L.A. Lebofsky (1978) Asteroid 1 Ceres: Evidence for water of hydration. Mon. Not. R. Astron. Soc., 182, 17-21; [2] A.S. Rivkin et al. (2002) Hydrated Minerals on Asteroids. In Asteroids III (W.F. Bottke Jr. et al., eds), Univ. of Arizona, Tucson; [3] M. Miyamoto and M.E. Zolensky (1994) Infrared diffuse reflectance spectra of carbonaceous chondrites: Amount of hydrous minerals. Meteoritics, 29, 849-853; [4] K. Sato et al. (1997) Absorption bands near 3 microns in diffuse reflectance spectra of carbonaceous chondrites: Comparison with asteroids. Meteoritics, 32, 503-507; [5] A.S. Rivkin et al. (2003) Hydrogen concentrations on C-class asteroids derived from remote sensing. Meteoritics and Planetary Science, 38, 1383-1398; [6] J.T. Rayner et al. (2003) Spex: A medium-resolution 0.8-5.5 micron spectrograph and imager for the NASA Infrared Telescope Facility. Publ. Astron. Soc. Pacific 115, 362-382
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