Far-infrared and submillimeter observations of Barnard 35 - Heat sources for bright-rimmed molecular clouds

Details Far-infrared and submillimeter observations of Barnard 35 - Heat sources for bright-rimmed molecular clouds Far-infrared and submillimeter observations of Barnard 35 - Heat sources for bright-rimmed molecular clouds

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...251l..91l&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 251, Dec. 15, 1981, p. L91-L95.

Astronomy and Astrophysics

Astronomy

16

Carbon Monoxide, Far Infrared Radiation, Heat Sources, Interstellar Gas, Molecular Clouds, Molecular Spectra, Submillimeter Waves, Cosmic Dust, Early Stars, Gas Temperature, Hydrogen Clouds, Infrared Astronomy, Thermal Radiation, Thermodynamic Equilibrium

Scientific paper

Far-infrared and submillimeter continuum observations of a region of enhanced gas temperature in Barnard 35 are presented which were obtained in a study of dust and gas energetics in the bright-rimmed molecular cloud. Observations were obtained with the 90-cm telescope on board the NASA Kuiper Airborne Observatory, together with ground-based observations of the CO lines. The spectrum is found to correspond to a dust temperature of 10 + or - 5 K. A total dust luminosity of about 69 solar luminosities is estimated for the cloud, which may easily be supplied by stellar radiation from the background field or the Lambda Ori cluster. Observations of CO emission at 2.7 mm indicate a gas temperature of 23.4 + or - 3.5 K. The difference between the gas and dust temperatures confirms earlier suggestions that the gas and dust are not in thermal equilibrium and that gas-dust collisions are not the heat source for the molecular gas, however the actual source of the molecular gas heating remains uncertain.

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