Submillimeter wavelength survey of the galactic plane from L = -5 deg to L = +62 deg - Structure and energetics of the inner disk

Astronomy and Astrophysics – Astronomy

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Astronomical Spectroscopy, Infrared Astronomy, Milky Way Galaxy, Submillimeter Waves, Astronomical Catalogs, Astronomical Maps, Balloon-Borne Instruments, Carbon Monoxide, Galactic Structure, Spatial Distribution

Scientific paper

Observational results are presented from a new large-scale survey of the first quadrant of the galactic plane at wavelengths of 150, 250, and 300 microns, with a 10 x 10 arcmin beam. The emission detected in the survey arises from compact sources, most of which are identified with known peaks of 5 GHz or CO emission, or both, and from an underlying diffuse background with a typical angular width of about 0.9 deg (FWHM) which accounts for most of the emission. A total of 80 prominent discrete sources are identified and characterized, of which about half have not previously been reported at far-infrared wavelengths. The total infrared luminosity within the solar circle is about 1 to 2 x 10 to the 10th solar luminosity, and is probably emitted by dust that resides in molecular clouds.

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