Submillimeter observations of interstellar dust

Details Submillimeter observations of interstellar dust Submillimeter observations of interstellar dust

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990liaco..29..271p&link_type=abstract

In ESA, From Ground-Based to Space-Borne Sub-mm Astronomy p 271-274 (SEE N91-21986 13-89)

Astronomy and Astrophysics

Astronomy

2

Background Radiation, Cosmic Dust, Emission Spectra, Submillimeter Waves, Thermal Emission, Emissivity, Grain Size, Mass Distribution, Optical Thickness, Particle Size Distribution

Scientific paper

Ways of using thermal dust emission as a measure of the dust mass along the line of sight are outlined. Measurements at long wavelengths, well beyond the peak of the emission, in the Rayleigh-Jeans part of the spectrum are recommended in order to drive a gas column density based on the gas to dust ratio. At these wavelengths, the measured intensity is proportional to the dust temperature and the optical depth. The optical depth is proportional to the total amount of material. The optical depth depends on the optical properties of the dust at these long wavelengths but not on the grain size distribution.

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