Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...303..667s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 303, April 15, 1986, p. 667-687.
Astronomy and Astrophysics
Astronomy
16
Carbon Monoxide, Interstellar Gas, Molecular Clouds, Orion Nebula, Radio Astronomy, Emission Spectra, H Ii Regions, Millimeter Waves, Molecular Gases
Scientific paper
The results of mm-wave observations of the Orion Nebula were made to obtain data on the (J = 1-0) transitions of C-13O and CO are reported. The observations were made with a 4 m radiotelescope fitted with a spectrometer to gain 0.1 km/sec resolution. The C-13O emissions near the H II region were oriented mainly in N-S ridges and displayed 14 separate features, the latter indicating that much of the nebular gas is interacting with the H II region. The interaction was most intense in the regions within 1 pc of the Trapezium stars, where a 0.6 pc C-13O cavity was observed. The virial theorem is applied to analyze the gravitational stability of each C-13O features, with consideration given to the effects of the H II region. Two of the features, located at the southern edge of the nebula, are predicted to be gravitationally unstable, provided that their thicknesses are accurately portrayed from the observational data.
Fukui Yasuo
Kawabata Kiyoshi
Ogawa Hideo
Sugitani Kenichiro
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