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The astronomical lines have been reported by
(1) J. Cernicharo, C. Cabezas, J. R. Pardo, M. Agúndez,
C. Bermúdez, L. Velilla-Prieto, F. Tercero, J. A.
López-Pérez, J. D. Gallego, J. P. Fonfría,
G. Quintana-Lacaci, M. Guélin, and Y. Endo
2019, Astron. Astrophys. 630, Art. No. L2.
For low N transitions hyperfine splitting due to the
14N nucleus may be resolvable. Therefore,
predictions at lower frequencies should be viewed with
some caution. The predictions should be quite reliable
up to 180 or 200 GHz.
The dipole moment was taken from an ab initio calculation
in (1).
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