The extinction coefficients in mid- and far-infrared of silicate and iron-oxide minerals of interest for astronomical observations

Details The extinction coefficients in mid- and far-infrared of silicate and iron-oxide minerals of interest for astronomical observations The extinction coefficients in mid- and far-infrared of silicate and iron-oxide minerals of interest for astronomical observations

Sep 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ap%26ss..79...77k&link_type=abstract

Astrophysics and Space Science, vol. 79, no. 1, Sept. 1981, p. 77-85.

Astronomy and Astrophysics

Astrophysics

29

Astronomical Models, Infrared Absorption, Infrared Spectra, Interstellar Extinction, Iron Oxides, Silicates, Astronomical Spectroscopy, Cosmic Dust, Far Infrared Radiation, Mie Scattering, Minerals, Olivine, Pyroxenes

Scientific paper

The extinction properties of some high-temperature silicate minerals and iron oxides in the middle-infrared and far-infrared regions are reported in light of the probable importance of these minerals in interstellar spectra. Extinction coefficients were measured for fine particles of olivine, clinopyroxene, orthopyroxene, osdidian, magnetite and hematite as a function of particle radius. The high-temperature magnesium silicates (olivine and the pyroxenes) exhibit some peak structure, with extinction generally falling off as the inverse cube of the wavelength. The extinction curve of magnetite, on the other hand, falls off as the -1.5 power of the wavelength from 2.5 to 10 microns, and as the inverse wavelength in the far-infrared up to 100 microns, as in interstellar spectra.

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