Hamilton, JR;
Faure, A;
Tennyson, J;
(2016)
Electron-impact excitation of diatomic hydride cations.
Monthly Notices of the Royal Astronomical Society
, 455
(3)
pp. 3281-3287.
10.1093/mnras/stv2429.
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Abstract
R-matrix calculations combined with the adiabatic nuclei approximation are used to compute electron-impact rotational excitation rates for three closed-shell diatomic cations,HeH+, CH+, ArH+. Comparisons with previous studies showthat an improved treatment of threshold effects leads to significant changes in the low temperature rates; furthermore the new calculations suggest that excitation of CH+ is dominated by ΔJ = 1 transitions as is expected for cations with a large dipole moment. A model for ArH+ excitation in the Crab nebula is presented which gives results consistent with the observations for electron densities in the range 2-3 × 103 cm-3.
| Type: | Article |
|---|---|
| Title: | Electron-impact excitation of diatomic hydride cations |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stv2429 |
| Publisher version: | http://dx.doi.org/10.1093/mnras/stv2429 |
| Additional information: | © The Author 2015. Published by Oxford University Press on behalf of The Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1475595 |
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