ExoMol molecular line lists X: The spectrum of sodium hydride

Abstract

Accurate and complete rotational, rotational-vibrational and rotational-vibrational-electronic line lists are calculated for sodium hydride: both the NaH and NaD isotopologues are considered. These line lists cover all ro-vibrational states of the ground ($X$~${}^1{\Sigma }^{+}$) and first excited ($A$~${}^1{\Sigma }^{+}$) electronic states. The calculations use available spectroscopically-determined potential energy curves and new high-quality, \textit{ab initio} dipole moment curves. Partition functions for both isotopologues are calculated and the effect of quasibound states is considered. The resulting line lists are suitable for temperatures up to about 7000~K and are designed for studies of exoplanet atmospheres, brown dwarfs and cool stars. In particular, the NaH $A-X$ band is found to show a broad absorption feature at about 385 nm which should provide a signature for the molecule. All partition functions, lines and transitions are available as Supplementary Information to this article and at \url{www.exomol.com}.

8 pages, 5 figures, 6 tables

References in corpus (4)

• ExoMol molecular line lists V: The ro-vibrational spectra of NaCl and KCl
• ExoMol molecular line lists: IX The spectrum of AlO
• The rovibrational spectrum of BeH, MgH and CaH at high temperatures in the $X{}^2{\Sigma }^{+}$ state: a theoretical study
• Exomol molecular line lists VI: A high temperature line list for Phosphorus Nitride

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