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 1Σ+) and first excited (A 1Σ+) electronic states. The calculations use available spectroscopically-determined potential energy curves and new high-quality, ab initio dipole moment curves. Partition functions for both isotopologues are calculated and the effect of quasi-bound 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 www.exomol.com.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- July 2015
- DOI:
- 10.1093/mnras/stv979
- arXiv:
- arXiv:1506.00174
- Bibcode:
- 2015MNRAS.451..634R
- Keywords:
-
- molecular data;
- opacity;
- astronomical data bases: miscellaneous;
- planets and satellites: atmospheres;
- stars: low-mass;
- Astrophysics - Astrophysics of Galaxies;
- Physics - Chemical Physics
- E-Print:
- 8 pages, 5 figures, 6 tables