Table 1
Observational and spectral parameters of H13CN and HC15N as well as the HF components of N2H+ and its 15N isotopologues.
| Transition | Rest frequency | Quantum numbers (a) | Statistical weight | Eu | Aul |
|---|---|---|---|---|---|
| GHz | [K] | [s−1] | |||
| H13CN | 86.3399214 | 1 → 0 | 9 | 4.14 | 2.23 × 10−5 |
| HC15N | 86.0549664 | 1 → 0 | 3 | 4.13 | 2.20 × 10−5 |
| 15NNH+ | 90.2634867 | 1 1 →0 1 | 3 | 4.33 | 3.30 × 10−5 |
| 90.2639119 | 1 2 →0 1 | 5 | |||
| 90.2645041 | 1 0 → 0 1 | 1 | |||
| N15NH+ | 91.2042615 | 1 1 →0 1 | 3 | 4.38 | 3.44 × 10−5 |
| 91.2059911 | 1 2 →0 1 | 5 | |||
| 91.2085167 | 1 0 → 0 1 | 1 | |||
| N2H+ | 93.1716157 | 1 1 0 →0 1 1 | 1 | 4.47 | 3.63 × 10−5 |
| 93.1719106 | 1 1 2 →0 1 2 | 10 | 3.60 × 10−5 | ||
| 93.1720477 | 1 1 1 →0 1 0 | 9 | 3.63 × 10−5 | ||
| 93.1734734 | 1 2 2 →0 1 1 | 10 | 3.63 × 10−5 | ||
| 93.1737699 | 1 2 3 →0 1 2 | 7 | 3.63 × 10−5 | ||
| 93.1739640 | 1 2 1 →0 1 1 | 9 | 3.63 × 10−5 | ||
| 93.1762595 | 1 0 1 →0 1 2 | 9 | 3.63 × 10−5 | ||
Notes. All spectroscopic parameters have been taken from the CDMS (Endres et al. 2016). (a)The quantum numbers represent the J (H13CN and HC15CN), J and F1 (15NNH+ and N15NH+) and J, F1 and F (N2H+) levels.
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