ExoMol line lists -- XXXVIII. High-temperature molecular line list of silicon dioxide (SiO${}_2$)

Abstract

Silicon dioxide (SiO${}_2$) is expected to occur in the atmospheres of hot rocky super-Earth exoplanets but a lack of spectroscopic data is hampering its possible detection. Here, we present the first, comprehensive molecular line list for SiO${}_2$. The line list, named OYT3, covers the wavenumber range 0\,--\,6000~cm${}^{-1}$ (wavelengths $\lambda >1.67$~$\mu$m) and is suitable for temperatures up to $T=3000$~K. Almost 33 billion transitions involving 5.69 million rotation-vibration states with rotational excitation up to $J=255$ have been computed using robust first-principles methodologies. The OYT3 line list is available from the ExoMol database at http://www.exomol.com.

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