Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...296..600v&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 296, Sept. 15, 1985, p. 600-605.
Astronomy and Astrophysics
Astrophysics
47
Interstellar Matter, Line Spectra, Millimeter Waves, Molecular Clouds, Orion Nebula, Hydrocyanic Acid, Interferometers, Least Squares Method, Rotating Matter
Scientific paper
The 88.6 GHz J = 1-0 transition of HCN toward the Orion-Kleinmann-Low nebula has been mapped with an angular resolution of 6 arcsec using the Hat Creek interferometer. Systematic gradients have been detected in the velocity of the molecular 'ridge' gas across a 1 arcmin region centered near the BN and TRc2 infrared cluster. Approaching IRc2 from the south, the ridge velocity decreases from roughly 8 to 6 km/s, but from the north it increases from roughly 10 to 11 km/s. The velocity gradient is interpreted as rotation of the cloud complex. The rotation curve is consistent with a density distribution in which the cloud mass increases linearly with distance from IRc2.
Bieging John H.
Plambeck Richard L.
Vogel Stuart N.
Welch William J.
Wright Mel C. H.
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