Electron-impact rotational excitation of the carbon monosulphide (CS) molecule - Archive ouverte HAL
Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2010

Electron-impact rotational excitation of the carbon monosulphide (CS) molecule

Hemal N. Varambhia
  • Fonction : Auteur
Alexandre Faure
K. Graupner
  • Fonction : Auteur
Thomas A. Field
  • Fonction : Auteur
Jonathan Tennyson

Résumé

Rotational excitation of the carbon monosulphide (CS) molecule by thermal electron-impact is studied using the molecular forumla-matrix method combined with the adiabatic-nuclei-rotation (ANR) approximation. Rate coefficients are obtained for electron temperatures in the range 5–5000 K and for transitions involving levels up to J= 40. It is confirmed that dipole allowed transitions (ΔJ= 1) are dominant and that the corresponding rate coefficients exceed those for excitation by neutrals by at least five orders of magnitude. As a result, the present rates should be included in any detailed population model of CS in sources where the electron fraction is larger than ∼10−5, in particular in diffuse molecular clouds and interstellar shocks.
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hal-00631823 , version 1 (19-11-2021)

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Hemal N. Varambhia, Alexandre Faure, K. Graupner, Thomas A. Field, Jonathan Tennyson. Electron-impact rotational excitation of the carbon monosulphide (CS) molecule. Monthly Notices of the Royal Astronomical Society, 2010, 403, pp.1409. ⟨10.1111/j.1365-2966.2010.16207.x⟩. ⟨hal-00631823⟩
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