Computer Science
Scientific paper
Jan 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999lpico.969r..33w&link_type=abstract
Workshop on Thermal Emission Spectroscopy and Analysis of Dust, Disks, and Regoliths, 28-30 April, 1999 in Houston, TX. Convene
Computer Science
Emission Spectra, Thermal Emission, Olivine, Asteroids, Mineralogy, Kuiper Airborne Observatory, Airborne Equipment, Display Devices, Iron, Reflectance, Silicates, Size Distribution
Scientific paper
Thermal emission spectra of the largest asteroid, 1 Ceres, obtained from the Kuiper Airborne Observatory display features that may provide information about its surface mineralogy. The emissivity, obtained by dividing the spectra by a standard thermal model, is compared with emissivity spectra of olivines and phyllosilicates deduced via Kirchoff's law from reflectivity measurements. The spectra provide a fairly good match to fine grained olivines (0 to 5 micrometer size range). The smoothness of the spectrum beyond 18 micrometers is an indication of particles smaller than 50 micrometers. While the abrupt rise in emissivity near 8 micrometers matches many silicates, the distinct emissivity minimum centered near 12.8 micrometers is consistant with iron-poor olivines, but not with phyllosilicates. It suggests the presence of opaques and does not exclude a mixture with organics and fine-grained phyllosilicates.
Cohen Martin
Roush Ted L.
Witteborn Fred. C.
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