Mant, BP;
Yachmenev, A;
Tennyson, J;
Yurchenko, SN;
(2018)
ExoMol molecular line lists - XXVII. Spectra of C2H4.
Monthly Notices of the Royal Astronomical Society
, 478
(3)
pp. 3220-3232.
10.1093/mnras/sty1239.
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Abstract
A new line list for ethylene, 12C2 1H4, is presented. The line list is based on high-level ab initio potential energy and dipole moment surfaces. The potential energy surface is refined by fitting to experimental energies. The line list covers the range up to 7000 cm−1 (1.43 μm) with all ro-vibrational transitions (50 billion) with the lower state below 5000 cm−1 included and thus should be applicable for temperatures up to 700 K. A technique for computing molecular opacities from vibrational band intensities is proposed and used to provide temperature dependent cross-sections of ethylene for shorter wavelength and higher temperatures. When combined with realistic band profiles (such as the proposed three-band model), the vibrational intensity technique offers a cheap but reasonably accurate alternative to the full ro-vibrational calculations at high temperatures and should be reliable for representing molecular opacities. The C2H4 line list, which is called MaYTY, is made available in electronic form from the CDS (http://cdsarc.u-strasbg.fr) and ExoMol (www.exomol.com) databases.
| Type: | Article |
|---|---|
| Title: | ExoMol molecular line lists - XXVII. Spectra of C2H4 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/sty1239 |
| Publisher version: | https://doi.org/10.1093/mnras/sty1239 |
| Language: | English |
| Additional information: | Copyright © The Author(s) 2018. 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. |
| Keywords: | molecular data, opacity, astronomical data bases: miscellaneous, planets and satellites: atmospheres, stars: low-mass |
| 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 Chemistry UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10050202 |
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