Interstellar dust models

Details Interstellar dust models Interstellar dust models

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993adspr..13..453d&link_type=abstract

Advances in Space Research (ISSN 0273-1177), vol. 13, no. 12, p. (12)453-(12)463

Astronomy and Astrophysics

Astronomy

Astronomical Models, Cosmic Dust, Emission Spectra, Emissivity, Grain Size, Infrared Astronomy, Interstellar Extinction, Milky Way Galaxy, Cosmic Background Explorer Satellite, Graphite, Infrared Astronomy Satellite, Infrared Space Observatory (Iso), Iron, Polycyclic Aromatic Hydrocarbons, Silicates, Space Infrared Telescope Facility

Scientific paper

Interstellar dust models, previously constrained only from the extinction curve, have been radically changed with the arrival of IRAS observations of the dust infrared emission. An important component of interstellar dust is likely to be made of small particles that show a fluctuating temperature upon impinging single photons and which can produce large near and mid infrared excesses ubiquitously observed in the Galaxy and external galaxies. The analysis of Cosmic Background Explorer satellite (COBE) data should soon improve our understanding of dust infrared emissivity and particularly for big grains in the submillimeter domain. We will discuss the key observations (spectral features, broad-band colors, correlations with gas tracers...) which put the best constraints on any dust models and show that the next generation of IR/submm satellites Infrared Space Observatory (ISO), Space Infrared Telescope Facility (SIRTF)...) should improve our knowledge of interstellar dust composition and the dust redistribution of the stellar energy inside galaxies.

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