A study of very high resolution visible spectra of Titan: Line characterisation in visible CH<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si161.svg" display="inline" id="d1e1250"><mml:msub><mml:mrow/><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:math> bands and the search for C<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si39.svg" display="inline" id="d1e1258"><mml:msub><mml:mrow/><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:math>

Rianço-Silva, Rafael; Machado, Pedro; Martins, Zita; Lellouch, Emmanuel; Loison, Jean-Christophe; Dobrijevic, Michel; Dias, João A.; Ribeiro, José

doi:10.1016/j.pss.2023.105836

Planetary and Space Science

2024

DOI: 10.1016/j.pss.2023.105836

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A study of very high resolution visible spectra of Titan: Line characterisation in visible CH4 bands and the search for C3

Rafael Rianço-Silva,

Pedro Machado,

Zita Martins

et al.

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ExoMol line lists – LXII. Ro-vibrational energy levels and line strengths for the propadienediylidene (C3) in its ground electronic state

Lynas-Gray,

Polyansky,

Tennyson

et al. 2024

Monthly Notices of the Royal Astronomical Society

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Improved opacities are needed for modelling the atmospheres and evolution of cool carbon-rich stars and extra-solar planets; in particular, contributions made by the astrophysically important propadienediylidene (C3) molecule need, at a minimum, to be determined using a line list which includes all significant transitions in the energy range of interest. We report variational calculations giving ro-vibrational energy levels and corresponding line-strengths for 12C3, 12C13C12C and 12C12C13C. In the 12C3 case we obtain 2 166 503 ro-vibrational state energies ≤20000 cm−1 for the electronic $\tilde{X}{\, }^{1}{\Sigma _{\rm g}}^{+}$ ground-state. Comparison with experiment indicates a maximum error of ±0.03 cm−1 in calculated positions of lines involving an upper state energy ⪅4000 cm−1. For lines with upper state energies ⪆4000 cm−1 to have comparable line-position accuracies, conical intersections would need to be accounted for in an adopted potential energy surface. Line lists and associated opacities are provided in the ExoMol Database (http://www.exomol.com).

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ExoMol line lists – LXII. Ro-vibrational energy levels and line strengths for the propadienediylidene (C3) in its ground electronic state

Lynas-Gray,

Polyansky,

Tennyson

et al. 2024

Monthly Notices of the Royal Astronomical Society

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show abstract

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A study of very high resolution visible spectra of Titan: Line characterisation in visible CH4 bands and the search for C3

Cited by 1 publication

References 37 publications

ExoMol line lists – LXII. Ro-vibrational energy levels and line strengths for the propadienediylidene (C3) in its ground electronic state

ExoMol line lists – LXII. Ro-vibrational energy levels and line strengths for the propadienediylidene (C3) in its ground electronic state

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