Interstellar dust models for extinction and emission

Details Interstellar dust models for extinction and emission Interstellar dust models for extinction and emission

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...237..215d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 237, no. 1, Oct. 1990, p. 215-236.

Astronomy and Astrophysics

Astrophysics

685

Cosmic Dust, Emission Spectra, Infrared Radiation, Interstellar Matter, Astronomical Models, Carbon, Extinction, Grain Size, Particle Size Distribution, Silicates

Scientific paper

A new coherent interpretation of the interstellar extinction and the IR emission is proposed which uses an empirical dust model made of big grains, very small grains, and polycyclic aromatic hydrocarbons. It is argued that the big grain component is probably made of a size distribution of silicates with some dark refractory mantle and that very small gains are probably carbon-dominated. The variations of IR colors with the intensity of the incident radiation field is studied in various astrophysical situations. Correlations between anomalous extinction curves and anomalous IR colors are predicted.

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