Astronomy and Astrophysics – Astronomy
Scientific paper
May 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...237..711d&link_type=abstract
Astrophysical Journal, Part 1, vol. 237, May 1, 1980, p. 711-733.
Astronomy and Astrophysics
Astronomy
54
H Ii Regions, Infrared Astronomy, Interstellar Gas, Molecular Gases, Nebulae, Radio Astronomy, Abundance, Astronomical Photography, Carbon Monoxide, Hydrocyanic Acid, Radial Velocity, Spatial Distribution, Sulfides, Tables (Data), Velocity Distribution
Scientific paper
The distributions of the emission from (C-12)O, (C-13)O, CS, and HCN have been mapped in the W3 molecular cloud. The emission is divided into three components according to the spatial distribution of the intensity and the associated velocity. Although the overall cloud is investigated, the emphasis is on the brightest condensation referred to as the W3 core. This dense and dynamically active region contains several embedded compact H II regions, IR sources, and masers. Strong (C-12)O self-absorption occurs toward the compact infrared source IRS 5 where emission from dust at 1 mm and in the far-infrared and the emission from (C-13)O and HCN are strongest, but the emission from CS, by contrast, is rather weak. Collapse of the W3 core is inferred from the line profiles. A velocity gradient is observed across the W3 core.
Dickel Helene R.
Dickel John R.
Werner Michael W.
Wilson William J.
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