Far infrared study of molecular clouds - Dust temperature profiles in S 140, IC 1396, RCrA

Details Far infrared study of molecular clouds - Dust temperature profiles in S 140, IC 1396, RCrA Far infrared study of molecular clouds - Dust temperature profiles in S 140, IC 1396, RCrA

Mar 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....83..140d&link_type=abstract

Astronomy and Astrophysics, vol. 83, no. 1-2, Mar. 1980, p. 140-148.

Astronomy and Astrophysics

Astrophysics

18

Clouds, Cosmic Dust, Far Infrared Radiation, Interstellar Matter, Protostars, Temperature Profiles, Infrared Photometry, Radiative Transfer, Saturn (Planet), Stellar Luminosity, Temperature Distribution

Scientific paper

Three molecular clouds (S 140, IC 1396, RCrA) are mapped in two colours in the wavelength range 70-200 microns with a 4.5 arc min resolution. Although peak far infrared emission is observed in the three sources at the location of the CO peak, an extended component is detected in S 140, with a significant contribution extending 20 arc min away from S 140 IR. The total infrared luminosity of the whole cloud appears to be an order of magnitude higher than the luminosity of the central core. A very luminous embedded object (not less than 100,000 solar luminosities) may account for the near infrared photometry of S 140 IR and for the total luminosity of the cloud. The radial variation of the dust colour temperature is determined and compared to the gas kinetic temperature. At the cloud edge, these two temperatures appear to be very close, despite the fact that collisional equilibrium is far from being achieved.

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