A high resolution far-infrared survey of a section of the galactic plane. I. The nature of the sources

Details A high resolution far-infrared survey of a section of the galactic plane. I. The nature of the sources A high resolution far-infrared survey of a section of the galactic plane. I. The nature of the sources

Jan 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...252..601j&link_type=abstract

Astrophysical Journal, Part 1, vol. 252, Jan. 15, 1982, p. 601-609.

Astronomy and Astrophysics

Astronomy

36

Far Infrared Radiation, High Resolution, Infrared Astronomy, Lyman Spectra, Milky Way Galaxy, Radio Sources (Astronomy), Carbon Monoxide, Carbon 12, Carbon 13, Early Stars, H Ii Regions, Luminosity, Molecular Clouds, Radiant Flux Density, Star Clusters, Stellar Evolution, Water Masers

Scientific paper

Far-infrared, radio continuum and (C-12)O and (C-13)O line observations are presented of 42 far-infrared sources. The sources range in luminosity from 4000 to 3,000,000 solar luminosities. Most of them are associated with (C-12)O peaks. More than half the sources have associated H2O maser emission, and half possess associated radio continuum emission at a limit of 100 mJy. Eight have radio emission at weaker levels. In many cases, the far-infrared source is smaller than its associated radio source. The difference can be explained in the context of the 'blister' picture of H II regions. One group of sources emits many fewer Lyman continuum photons than expected, considering the far-infrared luminosities. A number of possible reasons for this are examined; the explanation holding that clusters of early type stars rather than single stars excite the far-infrared sources is considered the most reasonable.

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