Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...331..509g&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 331, Aug. 1, 1988, p. 509-522.
Astronomy and Astrophysics
Astronomy
38
Continuous Spectra, Cosmic Dust, H Ii Regions, Infrared Sources (Astronomy), Molecular Clouds, Color-Magnitude Diagram, Emission Spectra, Galactic Nuclei, Interstellar Gas, Protostars, Radiant Flux Density, Star Formation
Scientific paper
This paper presents the continuum spectra of large, warm interstellar clouds associated with the H II regions W3 Main, M42, NGC 2024, Sgr B2, and M17. These clouds appear to be highly fragmented such that the color temperatures derived from their continuum spectra may represent average temperatures within the clouds. Their color temperatures range from 30 to 110K. The frequency index, β, of their dust emissivities is approximately 2.0 except for OMC-1, for which β ranges from 0.8 to 1.5. The author calculates the grain opacities at 1300 μm as well as the IR luminosities and dust masses for the clouds and their components.
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