Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...155..380c&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 155, no. 2, Feb. 1986, p. 380-396.
Astronomy and Astrophysics
Astrophysics
159
Cosmic Dust, Infrared Spectra, Interstellar Radiation, Radiant Heating, Spiral Galaxies, Stellar Evolution, Emission Spectra, Far Infrared Radiation, Hydrogen Clouds, Infrared Radiation, Molecular Clouds, O Stars, Pre-Main Sequence Stars, Submillimeter Waves
Scientific paper
The authors present a model of the IR/sub mm emission from the galactic disk, which explains quantitatively all relevant observations available to date. The emission comes from dust which is heated by absorption of star light. The spectrum of the dust emission from the inner part of the Galaxy (R ⪉ 8 kpc), expressed in units of λIλ, attains two maxima at ≡100 μm and between 4 and 20 μm. This spectrum can be explained by contributions from different dust components, which are characterized by their modified Planck or color temperatures. The principal contribution to the heating of these dust components comes from the general interstellar radiation field and from the more massive stars of the galatic disk population in specific evolutionary stages.
Cox Pierre
Kruegel Endrick
Mezger Peter G.
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