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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Cosmic Dust, Far Infrared Radiation, Galactic Structure, Interstellar Matter, Luminosity, Milky Way Galaxy, Spatial Distribution, Submillimeter Waves, Thermal Emission, Astronomical Maps, Astronomical Models, Balloon-Borne Instruments, Brightness, Carbon Monoxide, Mapping, Molecular Clouds, Molecular Gases, Photometers, Telescopes, Temperature Distribution

Scientific paper

Results from a large scale survey of the first quadrant of the Milky Way galactic plane at wavelengths of 150, 250, and 300 microns with a 10x10 arcmin beam are presented. The emission detected in the survey arises from compact sources, most of which are identified with known peaks of 5 GHz and/or CO emission, and from an underlying diffuse background with a typical angular width of approximately 0.9 deg (FWHM) which accounts for most of the emission. A total of 80 prominent discrete sources were identified and characterized, of which about half were not previously reported at far infrared wavelengths. The total infrared luminosity within the solar circle is approximately 1 to 2x10 to the 10th power L0, and is probably emitted by dust that resides in molecular clouds.

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