Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.189..287w&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 189, Oct. 1979, p. 287-291.
Astronomy and Astrophysics
Astronomy
6
Carbon Monoxide, Emission Spectra, Hydrogen Clouds, Interstellar Gas, Molecular Spectra, Nebulae, Astronomical Maps, Astronomical Models, Carbon Isotopes, Infrared Spectra, Spectral Line Width
Scientific paper
Observations have been made of the J = 2 → 1 transition of 12CO and 13CO in the molecular cloud near NGC 2024. The most intense emission comes from the central regions of the nebula close to areas of high optical extinction. The source contains two hotspots, but no significant velocity gradient or line-broadening was observed. This is consistent with a model in which the emission arises mainly from the high-density interface between the expanding H II region and a neutral cloud. Measurements of the 13CO isotope indicates that τ13 > 1.7, but there is insufficient information to derive the density in the region. Analysis of data for Mon R2, however, using the radially collapsing cloud model, indicates a hydrogen density of ˜2 × 104 cm-3 for that source.
Cronin Nigel J.
van Vliet H. F. A.
Watt Graeme D.
White Glen J.
No associations
LandOfFree
Observations of the J = 2 - 1 line of carbon monoxide in the NGC 2024 nebula does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Observations of the J = 2 - 1 line of carbon monoxide in the NGC 2024 nebula, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observations of the J = 2 - 1 line of carbon monoxide in the NGC 2024 nebula will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1388399