Far-infrared observations of the galactic plane and molecular cloud S140

Details Far-infrared observations of the galactic plane and molecular cloud S140 Far-infrared observations of the galactic plane and molecular cloud S140

Apr 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...213l..35r&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 213, Apr. 1, 1977, p. L35-L39. Research supported by the Institut Na

Astronomy and Astrophysics

Astronomy

46

Cosmic Dust, Far Infrared Radiation, Galactic Radiation, Galactic Structure, Infrared Astronomy, Luminous Intensity, Airborne Equipment, Carbon Monoxide, H Ii Regions, Interstellar Matter, Telescopes

Scientific paper

The French Airborne Infrared Telescope was used for far-IR (72 to 94 microns and 114 to 196 microns) observations of Saturn (as a calibration source), a dark cloud near the H II region S140, and the galactic plane. Far-IR emission was detected from a region situated in the dark molecular cloud L1204, a few arcmin NE of S140, and is shown to be associated with that cloud. A dust temperature of about 35 K is deduced, the total IR intensity is computed, and a mass of 600 solar masses is estimated for the observed area. Observation of diffuse far-IR emission from the galactic plane at 28 deg latitude is reported. A dust temperature of 22 K is deduced, and a calculation of the IR luminosity per hydrogen atom is performed which indicates that the Galaxy has a total IR luminosity of the order of or greater than its optical luminosity. The detection of a previously unknown IR source close to the galactic plane is also noted.

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