Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...228..780s&link_type=abstract
Astrophysical Journal, Part 1, vol. 228, Mar. 15, 1979, p. 780-786. NSF-supported research;
Astronomy and Astrophysics
Astrophysics
69
Infrared Absorption, Infrared Radiation, Interstellar Extinction, Interstellar Matter, Silicates, Absorption Spectra, Electron Diffraction, Emission Spectra, Laser Heating, Olivine, Optical Thickness, Vaporizing, X Ray Diffraction
Scientific paper
Emission and absorption spectra from 4 to 14 microns of ground and laser-vaporized olivine and enstatite silicates are compared with the 10-micron emission feature of the Orion Trapezium. The agreement in band center and shape between the amorphous laser-vaporized olivine sample and the Trapezium feature suggests that amorphous silicate grains of approximately olivine composition may be a major constituent of interstellar dust. Differences between the emission and absorption spectral profiles (absorption plus scattering) show characteristics that could be used as a sensitive probe of the morphology of interstellar grain systems when high signal-to-noise ratio (30-100) observational spectra become available.
Rusell R. W.
Stephens John R.
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