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The entry is based on a recent report by
(1) L. Bizzocchi, V. Lattanzi, J. Laas, S. Spezzano, B. M. Giuliano,
D. Prudenzano, C. Endres, O. Sipilä, and P. Caselli,
2017, Astron. Astrophys. 602, Art. No. A34.
As in that study, additional data were taken
from
(2) M. Bogey, C. Demuynck, and J.-L. Destombes,
1986, J. Chem. Phys. 84, 10.
and from
(3) M. Bogey, C. Demuynck, J.-L. Destombes, and A. Krupnov,
1988, J. Mol. Struct. 190, 465;
The ground state of HOCO+ is perturbed by the
excited v5 = 1 state. Since the
molecule has been detected thus far in cold environments
only, transition frequencies with Ka = 3
and higher were omitted from the fit, and the predictions
were limited to Ka ≤ 2.
Predictions with uncertainties larger than 0.2 MHz
or b-type transitions with Ka = 2
should be viewed with caution.
The dipole moment was taken from a quantum chemical
calculation in (1). Note
that the values of the two components have essentially been
interchanged with respect to earlier calculations.
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