Tennyson, J;
Hulme, K;
Naim, OK;
Yurchenko, SN;
(2016)
Radiative lifetimes and cooling functions for astrophysically important molecules.
Journal of Physics B: Atomic, Molecular and Optical Physics
, 49
(4)
, Article 044002. 10.1088/0953-4075/49/4/044002.
Preview |
Text
1601.07997v1.pdf - Accepted Version Download (1MB) | Preview |
Abstract
© 2016 IOP Publishing Ltd. Extensive line lists generated as part of the ExoMol project are used to compute lifetimes for individual rotational, rovibrational and rovibronic excited states, and temperature-dependent cooling functions by summing over all dipole-allowed transitions for the states concerned. Results are presented for SiO, CaH, AlO, ScH, H2O and methane. The results for CH4 are particularly unusual with four excited states with no dipole-allowed decay route and several others, where these decays lead to exceptionally long lifetimes. These lifetime data should be useful in models of masers and estimates of critical densities, and can provide a link with laboratory measurements. Cooling functions are important in stellar and planet formation.
| Type: | Article |
|---|---|
| Title: | Radiative lifetimes and cooling functions for astrophysically important molecules |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/0953-4075/49/4/044002 |
| Publisher version: | http://dx.doi.org/10.1088/0953-4075/49/4/044002 |
| Language: | English |
| Additional information: | © 2016 IOP Publishing Ltd |
| Keywords: | molecular spectra, intensities, molecular processes, radiation mechanisms |
| 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/1474934 |
Archive Staff Only
 |
View Item |
