Detection of the torsionally excited state of methanol in Orion A

Details Detection of the torsionally excited state of methanol in Orion A Detection of the torsionally excited state of methanol in Orion A

Feb 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...253..149l&link_type=abstract

Astrophysical Journal, Part 1, vol. 253, Feb. 1, 1982, p. 149-153.

Astronomy and Astrophysics

Astronomy

38

Interstellar Gas, Methyl Alcohol, Molecular Excitation, Molecular Spectra, Orion Nebula, Radio Astronomy, Temperature Probes, Torsional Vibration

Scientific paper

Torsionally excited methanol has been detected in Orion A, where three emission lines observed in the region of 93-100 GHz coincide with laboratory measurements of three methanol transitions. Torsionally excited methanol may therefore be used as a novel temperature probe, since this state lies near 200 per cm above the ground state, or about 290 K. No emission was detected from the transition arising from levels near 300 per cm, or approximately 430 K above the ground state.

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