Extinction of Olivine and Pyroxene in the Mid Infrared and Far Infrared
Abstract
The extinction coefficients Qext/α of orthopyroxene, clinopyroxene, FO100, FO90, FO80, FO60, FO40 and the Allende meteorite have been obtained in the mid- and far-infrared ranges. These crystalline silicates have many absorption peaks. The main peaks in forsterite at 10, 11, 20, 24, 34, 50 and 70 μm shift to longer wavelength and weaken as the Mg/(Mg+Fe) ratio decreases. We discuss the composition of cometary dust grains in relation to our data.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- October 1993
- DOI:
- 10.1093/mnras/264.3.654
- Bibcode:
- 1993MNRAS.264..654K
- Keywords:
-
- comets: general - meteoroids - dust;
- extinction - infrared: general