Shocked carbon monoxide in G333.6-0.2

Details Shocked carbon monoxide in G333.6-0.2 Shocked carbon monoxide in G333.6-0.2

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.237.1001s&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 237, April 15, 1989, p. 1001-1007.

Astronomy and Astrophysics

Astronomy

5

Carbon Monoxide, H Ii Regions, Molecular Clouds, Far Infrared Radiation, Gas Density, Gas Temperature, Milky Way Galaxy, Molecular Spectra, Shock Waves

Scientific paper

Rotationally excited carbon monoxide has been detected in the Galactic H II region/molecular cloud complex G333.6-0.2 in the 163-micron J = 16 to 15 and 186-micron J = 14 to 13 transitions. These detections, together with an upper limit to the J = 21 to 20 transition at 124 microns indicate that the excited CO emission comes from gas of kinetic temperature 200 to 800 K and pressure of about 5 x 10 to the 7th/cu cm. A high-resolution spectrum of the J = 14 to 13 transition shows CO emission over more than 80 km/s, possibly with a double peaked profile centered near the systemic velocity of G333.6-0.2. The far-infrared CO emission probably comes from shocked gas in the mass outflow from newly formed, massive stars. The detection of the J = 14 to 13 transition is the first to be made of this line in any source, and is the longest wavelength line yet detected in interstellar space by nonheterodyne techniques.

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