ExoMol line lists - XXXII. The rovibronic spectrum of MgO

Abstract

Line lists for magnesium oxide are computed and extensive comparisons are made with existing experimental spectra. The LiTY line lists cover all ro-vibration transitions within the five lowest-lying electronic states ($X{}^1{\Sigma }^{+}$, $a{}^3\Pi$, $A{}^1\Pi$, $B{}^1{\Sigma }^{+}$ and $b{}^3{\Sigma }^{+}$) and five isotopologues: ${}^{24}$Mg${}^{16}$O, ${}^{25}$Mg${}^{16}$O, ${}^{26}$Mg${}^{16}$O, ${}^{24}$Mg${}^{17}$O, ${}^{24}$Mg${}^{18}$O, ${}^{24}$Mg${}^{17}$O and ${}^{24}$Mg${}^{18}$O. The calculation use potential energy cures, spin-orbit and electronic angular momentum couplings curves determined by fitting to empirical energy levels; these levels are reproduced to within 0.01 \cm\ in most cases. Computed nuclear-motion wavefunctions are combined with {\it ab initio} dipole moment curves to give transition intensities and excited state radiative lifetimes which are compared with laboraroty measurements. The ${}^{24}$Mg${}^{16}$O line list comprises 186 842 ($J\le 320$) ro-vibronic states and 72 833 173 transitions with angular momenta, $J$, up to 300 and covering wavenumbers up to 33 000 cm${}^{-1}$ ($\lambda >0.3$ $\mu$m). The line lists are suitable for temperatures up to about 5000 K. They are relevant to astrophysical studies of exoplanet atmospheres, cool stars and brown dwarfs, and are made available in electronic form at the CDS and ExoMol databases.

References in corpus (6)

• ExoMol line lists XVIII. The high temperature spectrum of VO
• ExoMol molecular line lists V: The ro-vibrational spectra of NaCl and KCl
• ExoMol molecular line lists: IX The spectrum of AlO
• ExoMol molecular line lists - XXIII: spectra of PO and PS
• ExoMol line lists XXIV: A new hot line list for silicon monohydride, SiH
• Properties of the lunar exosphere during the perseid 2009 meteor shower

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