Computer Science
Scientific paper
Dec 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990stin...9114264b&link_type=abstract
Presented at the IAU Colloquium: Origin and Evolution of Interplanetary Dust, Kyoto, Japan, 27-30 Aug. 1990
Computer Science
Amorphous Materials, Cosmic Dust, Halley'S Comet, Infrared Spectra, Silicates, Crystallinity, Olivine
Scientific paper
Among the various silicates proposed as components of cosmic dust grains, olivine is considered one of the most likely materials. In this work we present the infrared spectra of three different types of olivine grains: crystalline, amorphous, and synthetic (also amorphous). While the first and second sample derive from the same natural mineral, the third one has been prepared in laboratory according to the relative cosmic abundances of the elements. The experiment data are used to fit the emission feature observed in the comet Halley spectrum between 8 and 13 microns. Satisfactory results are obtained by using synthetic olivine mixed with a small amount (5 percent) of crystalline grains.
Blanco Ariel
Bussoletti Ezio
Colangeli Luigi
Fonti Sergio
Orofino Vincenzo
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