Submillimeter observations of vibrationally excited NH3 towards Orion-KL

Details Submillimeter observations of vibrationally excited NH3 towards Orion-KL Submillimeter observations of vibrationally excited NH3 towards Orion-KL

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...261l...5s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 261, no. 1, p. L5-L8.

Astronomy and Astrophysics

Astrophysics

11

Ammonia, Interstellar Matter, Millimeter Waves, Molecular Excitation, Vibrational Spectra, Cosmic Dust, Orion Nebula

Scientific paper

We report the detection of a line at the frequency of the v(2) = l; 0(0) - 1(0) line of vibrationally excited ammonia at 466.244 GHz towards Orion-KL. The observation was made with the CSO telescope at Mauna Kea, Hawaii. Comparison with an earlier observation of the 2(1a) - 1(1a) line at 140 GHz shows that both lines can indeed be attributed to vibrationally excited ammonia. The results indicate that the excitation is due to 10/-micron IR radiation emitted by local dust with a temperature of 160-180 K, which is evidence for a close coupling between gas and dust temperatures in the Orion hot core.

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