Peach, G;
Yurchenko, S;
Chubb, K;
Baraffe, I;
Phillips, M;
Tremblin, P;
(2020)
The resonance lines of sodium and potassium in brown dwarf spectra.
Contributions of the Astronomical Observatory Skalnaté Pleso
, 50
(1)
pp. 193-202.
10.31577/caosp.2020.50.1.193.
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Abstract
Accurate pressure broadened line profiles of alkali resonance doublets are needed for the modelling of atmospheres of cool stars and for generating their synthetic spectra in the region 400 - 900 nm. When the lines utterly dominate their region of the spectrum, it becomes important to represent the profiles accurately over the whole range from the line centre to the far line wings. In this paper we examine the theories of spectral line shapes that have been used and carry out new calculations of the line shapes for the resonance lines of sodium and potassium broadened by helium.
| Type: | Article |
|---|---|
| Title: | The resonance lines of sodium and potassium in brown dwarf spectra |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.31577/caosp.2020.50.1.193 |
| Publisher version: | https://doi.org/10.31577/caosp.2020.50.1.193 |
| Language: | English |
| Additional information: | Open Access article, under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited |
| Keywords: | Spectral line broadening calculations, alkali resonance doublets, cool stars: synthetic spectra |
| 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/10094086 |
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