Far infrared observations of molecular clouds in the outer galaxy

Details Far infrared observations of molecular clouds in the outer galaxy Far infrared observations of molecular clouds in the outer galaxy

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984abas.symp..194m&link_type=abstract

In NASA. Ames Research Center Airborne Astron. Symp. p 194-198 (SEE N85-17848 08-89)

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Far Infrared Radiation, Milky Way Galaxy, Molecular Clouds, Stellar Evolution, Stellar Luminosity, C-141 Aircraft, Calibrating, Carbon Monoxide, Maps, Photometers, Spatial Distribution, Surveys, Tables (Data)

Scientific paper

The existence of molecular clouds in the outer galaxy allows the study of star formation at large galactocentric radii. The study of these clouds has two aims. A systematic survey is underway to study the large scale distribution of the molecular clouds outside the solar circle. To understand the physical conditions in the clouds, fully sampled maps were (and are being) made in CO and other molecules. The continuum emission is also being mapped. The main objective in doing an infrared study was to obtain information on the luminosity of the stars formed in these clouds. Assuming all energy radiated from the star is absorbed by the dust and then re-radiated in the infrared, one can get an estimate of the star's luminosity by integrating the flux over the source and converting it to a luminosity. Until these observations, the only way of judging stellar luminosities was from peak CO temperatures. Accounting for beam dilution, Kutner and Mead inferred from these that the heat sources were late B or later stars. The Kupier Airborne Observatory was used to search 9 sources in 5 clouds for far infrared emission.

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