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The data were taken from
(1) L. Bizzocchi, F. Tonolo, B. M. Giuliano, P. Caselli, M. Melosso,
L. Dore, S. Alessandrini, C. Puzzarini, and A. Pietropolli Charmet,
2024, Astrophys. J., 970, Art. No. 26.
The value of the distortion parameter H was very
incompatible with values of other isotopologs or a value
derived from a potential energy surface in
(2) M. Mladenović,
2017, J. Chem. Phys., 147, Art. No. 114111.
Therefore, H was kept fixed to a value very close
to the one from (2).
The calculation should be sufficiently accurate for observational
purposes. Increasing caution is advised above 1.2 THz.
At low J, it is possible to resolve the 17O
and D hyperfine splitting. Therefore, a separate
hyperfine calculation up to J" = 2 is provided.
The D hyperfine parameters were taken from the DCO+
isotopolog, tag 030510 and the ones of 17O from
HC17O+, tag 030505.
Note: The partion function given
below takes into account this splitting! In addition, it refers
to the ground vibrational state only; an
estimate of the vibrational partition function of
HCO+ may be applied.
The dipole moment is assumed to agree with that of the main
isotopic species, see e029507.cat.
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