ExoMol molecular line lists – XLII. Rovibronic molecular line list for the low-lying states of NO
Qianwei Qu, S. N. Yurchenko, Jonathan Tennyson
Abstract
ABSTRACT An accurate line list, called XABC, is computed for nitric oxide which covers its pure rotational, vibrational and rovibronic spectra. A mixture of empirical and theoretical electronic transition dipole moments are used for the final calculation of 14N16O rovibronic $\mathrm{A}\, ^2\Sigma ^+$ – $\mathrm{X}\, ^2\Pi$, $\mathrm{B}\, ^2\Pi$ – X2Π, and $\mathrm{C}\, ^2\Pi$ – $\mathrm{X}\, ^2\Pi$ which correspond to the γ, β, and δ band systems, respectively, as well as minor improvements to transitions within the $\mathrm{X}\, ^2\Pi$ ground state. The work is a major update of the ExoMol NOname line list. It provides a high-accuracy NO ultraviolet line list covering the complicated regions where the $\mathrm{B}\, ^2\Pi$-$\mathrm{C}\, ^2\Pi$ states interact. XABC provides comprehensive data for the lowest four doublet states of NO in the region of λ > 160 nm ($\tilde{\nu } \lt 63~000~\mathrm{cm}^{-1}$) for the analysis of atmospheric NO on Earth, Venus, or Mars, other astronomical observations and applications. The data are available via www.exomol.com.