Interstellar extinction in the infrared

Details Interstellar extinction in the infrared Interstellar extinction in the infrared

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.290...93d&link_type=abstract

In ESA, Infrared Spectroscopy in Astronomy p 93-98(SEE N90-19084 11-89)

Astronomy and Astrophysics

Astronomy

169

Infrared Astronomy, Infrared Spectra, Interplanetary Dust, Interstellar Extinction, Granular Materials, Infrared Sources (Astronomy), Infrared Spectroscopy, Magellanic Clouds, Silicates

Scientific paper

Extinction by interstellar dust at infrared wavelengths is reviewed. For wavelengths between 0.7 and 7 microns the observed extinction, both in the Galaxy and in the Magellanic clouds, appears to be consistent with a power law (Alambda proportional to lambda to the power of minus 1.75). In the 8 to 30 microns region interstellar extinction is dominated by the 9.7 microns and 18 microns silicate features; the absolute strength, the detailed wavelength-dependence of these features, and the possible variation of the profile shape from diffuse clouds to dense clouds, all remain controversial. In the far-infrared, grain emissivity estimates by different authors vary considerably.

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