ExoMol Line Lists — LXIII: ExoMol Line Lists For 12 Isotopologues Of CO2

Extensive rovibrational line lists are constructed for 12 isotopologues of carbon dioxide: ¹²C¹⁶O₂, ¹³C¹⁶O₂, ¹²C¹⁷O₂, ¹³C¹⁷O₂, ¹²C¹⁸O₂, ¹³C¹⁸O₂, ¹⁶O¹²C¹⁷O, ¹⁶O¹²C¹⁸O, ¹⁶O¹³C¹⁷O, ¹⁶O¹³C¹⁸O, ¹⁷O¹²C¹⁸O, and ¹⁷O¹³C¹⁸O.

The variational program TROVE was employed together with an exact kinetic energy operator, accurate empirical potential energy surface (Ames-2) and the ab initio dipole moment surface Ames-2021-40K. Empirical energy levels from the most recent MARVEL analyses, as well as from the HITRAN and CDSD databases, are used to replace calculated values where available.

The line lists are further supplemented by assigning AFGL quantum numbers using machine-learning based estimators. The resulting data were employed to generate opacities with four radiative transfer codes, TauREx, ARCiS, NEMESIS, and petitRADTRANS, both for individual isotopologues and for CO₂ at terrestrial isotopic natural abundance. All line lists and associated data are available at this http URL.

Sergei N. Yurchenko, Marco G. Barnfield, Charles A. Bowesman, Ryan P. Brady, Elizabeth R. Guest, Kyriaki Kefala, Qing-He Ni, Armando N. Perri, Oleksiy A. Smola, Andrei Solokov, Chenyi Tao, Jonathan Tennyson

Subjects: Earth and Planetary Astrophysics (astro-ph.EP); Astrophysics of Galaxies (astro-ph.GA); Solar and Stellar Astrophysics (astro-ph.SR)
Cite as: arXiv:2512.13889 [astro-ph.EP] (or arXiv:2512.13889v1 [astro-ph.EP] for this version)
https://doi.org/10.48550/arXiv.2512.13889
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Related DOI:
https://doi.org/10.1093/mnras/staf2135
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Submission history
From: Sergei Yurchenko N
[v1] Mon, 15 Dec 2025 20:46:49 UTC (8,952 KB)
https://arxiv.org/abs/2512.13889

Astrobiology, Astrochemistry,