Table 2.
Overview of the molecular properties for the two molecules presented in this paper.
| Molecule | Transition | Rest-freq. ν [GHz] | Aij [s−1] | Eu/k [K] | ncrit [cm−3] |
|---|---|---|---|---|---|
| H13CO+ | 1-0 | 86.754 | 3.8 × 10−5 | 4.2 | 4.1 × 104 |
| HCO+ | 1-0 | 89.189 | 4.2 × 10−5 | 4.3 | 4.5 × 104 |
Notes. Note that the critical density is for Tk = 20 K (kinetic temperature of colliding partners, Shirley 2015). Einstein A coefficients and upper energy-levels are taken from the Splatalogue database (https://splatalogue.online). Both line data are are from JPL (Jet Propulsion Laboratory).
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