Journal Article

Rate coefficients for the rovibrational excitation of CO by H<sub>2</sub> and He

D. R. Flower

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 425, issue 2, pages 1350-1356
Published in print September 2012 | ISSN: 0035-8711
Published online September 2012 | e-ISSN: 1365-2966 | DOI:
Rate coefficients for the rovibrational excitation of CO by H2 and He

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Cross-sections and rate coefficients have been calculated for the rovibrational excitation of CO by ortho- and para-H2 and by He. We adopted the quantal coupled channels method of solving the scattering equations, including CO rotational levels in the v = 0, 1 and 2 vibrational manifolds. Comparison is made with the results of previous calculations, which employed different interaction potentials and less accurate approximations to the collision dynamics. We consider that the present calculations yield reliable values of the rate coefficients for rovibrational excitation of CO at kinetic temperatures T ≈ 103 K.

Keywords: molecular processes; circumstellar matter; ISM: jets and outflows; ISM: molecules; infrared: ISM; radio lines: ISM

Journal Article.  4495 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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