Identification of interstellar methanol lines

Details Identification of interstellar methanol lines Identification of interstellar methanol lines

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...333..359s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 333, Oct. 1, 1988, p. 359-365. Research supported by Cray Research, Inc.

Astronomy and Astrophysics

Astrophysics

24

Interstellar Chemistry, Line Spectra, Methyl Alcohol, Molecular Spectra, Quantum Numbers, Spectrum Analysis, Interstellar Matter, Millimeter Waves, Rotational Spectra

Scientific paper

The extended internal axis method Hamiltonian of Herbst et al. has been employed to study the rotational spectrum of methanol out to high values of the rotational quantum number J. For 12CH3OH the available laboratory data, consisting of 783 lines out to J = 22, have been fitted with a Hamiltonian containing 32 free parameters. For 13CH3OH a Hamiltonian with 23 free parameters is sufficient for fitting 455 lines, also out to J = 22. Frequency predictions based on these fits have permitted the identification of a number of previously unidentified interstellar lines from OMC-1. The majority of these are b-type R-branch transitions of 12CH3OH.

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