Irwin, PGJ;
Bowles, N;
Braude, AS;
Garland, R;
Calcutt, S;
Coles, PA;
Yurchenko, SN;
(2019)
Analysis of gaseous ammonia (NH3) absorption in the visible spectrum of Jupiter - Update.
Icarus
, 321
pp. 572-582.
10.1016/j.icarus.2018.12.008.
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Abstract
An analysis of currently available ammonia (NH3) visible-to-near-infrared gas absorption data was recently undertaken by Irwin et al. (2018) to help interpret Very Large Telescope (VLT) MUSE observations of Jupiter from 0.48–0.93 µm, made in support of the NASA/Juno mission. Since this analysis a newly revised set of ammonia line data, covering the previously poorly constrained range 0.5–0.833 µm, has been released by the ExoMol project, “C2018” (Coles et al., 2018), which demonstrates significant advantages over previously available data sets, and provides for the first time complete line data for the previously poorly constrained 5520- and 6475-Å bands of NH3. In this paper we compare spectra calculated using the ExoMol–C2018 data set (Coles et al., 2018) with spectra calculated from previous sources to demonstrate its advantages. We conclude that at the present time the ExoMol–C2018 dataset provides the most reliable ammonia absorption source for analysing low- to medium-resolution spectra of Jupiter in the visible/near-IR spectral range, but note that the data are less able to model high-resolution spectra owing to small, but significant inaccuracies in the line wavenumber estimates. This work is of significance not only for solar system planetary physics, but for future proposed observations of Jupiter-like planets orbiting other stars, such as with NASA’s planned Wide-Field Infrared Survey Telescope (WFIRST).
| Type: | Article |
|---|---|
| Title: | Analysis of gaseous ammonia (NH3) absorption in the visible spectrum of Jupiter - Update |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.icarus.2018.12.008 |
| Publisher version: | https://doi.org/10.1016/j.icarus.2018.12.008 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Planets and satellites, Atmospheres — planets and satellites, Individual (Jupiter) |
| 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.ucl.ac.uk/id/eprint/10064626 |
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