Detection of the CO J = 4 - 3 transition from the Kleinman-Low Nebula
Abstract
The detection of the CO J = 4 - 3 rotational transition in the Kleinman-Low Nebula of the Orion Molecular Cloud is reported. Observations were obtained in March, 1980 using the 3.8-m U.K. Infrared Telescope at Mauna Kea with a heterodyne receiver at a beamwidth (FWHM) of 35.4 arcsec and a frequency of 461 GHz. Based on comparisons with (C-12)O and (C-13)O line intensities measured in the J = 1 - 0 transition, the high-velocity (C-12)O source detected in the present investigation is calculated to have a minimum gas kinetic temperature of about 600 K and a minimum CO column density of about 7 x 10 to the 18th/sq cm.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- August 1981
- Bibcode:
- 1981A&A...101L...1V
- Keywords:
-
- Carbon Monoxide;
- Electron Transitions;
- Infrared Astronomy;
- Interstellar Gas;
- Molecular Clouds;
- Nebulae;
- Brightness Temperature;
- Gas Temperature;
- Line Spectra;
- Spectrum Analysis;
- Astronomy