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

被引：14

作者：

Varambhia, Hemal N. ^{[2
]}

Faure, Alexandre ^{[1
]}

Graupner, K. ^{[3
]}

Field, Thomas A. ^{[3
]}

Tennyson, Jonathan ^{[2
]}

机构：

[1] Univ Grenoble 1, CNRS, Lab Astrophys Grenoble, UMR 5571, F-38041 Grenoble 09, France

[2] UCL, Dept Phys & Astron, London WC1E 6BT, England

[3] Queens Univ Belfast, Dept Phys & Astron, Belfast BT7 1NN, Antrim, North Ireland

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2010年 / 403卷 / 03期

基金：

英国科学技术设施理事会;

关键词：

molecular data; molecular processes; scattering; SULFUR-BEARING MOLECULES; INTERSTELLAR CLOUDS; COLLISIONS; CHEMISTRY; SEARCH; WATER;

D O I：

10.1111/j.1365-2966.2010.16207.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Rotational excitation of the carbon monosulphide (CS) molecule by thermal electron-impact is studied using the molecular R-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 (Delta J = 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 similar to 10(-5), in particular in diffuse molecular clouds and interstellar shocks.

引用

页码：1409 / 1412

页数：4

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