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Table 2
Molecular species observed with the Parkes and Mopra telescopes (with NIST recommended rest frequencies).
| Spectral line | Eu | neffa | Rest frequency |
| [K] | [× 103 cm-3] | [MHz] | |
|
|
|||
| NH3(1, 1) | 23.4 | − | 23 694.501 |
| NH3(2, 2) | 64.9 | − | 23 722.634 |
|
|
|||
| N2H + (123 − 012) | 4.47 | 2.5 | 93 173.777 |
| HNC(12 − 01) | 4.35 | 9.5 | 90 663.574 |
| HCO + (1 − 0) | 4.28 | 2.5 | 89 188.526 |
| H13CO + (1 − 0) | 4.16 | 2.2 | 86 754.288 |
| HCN(12 − 01) | 4.25 | 28 | 88 631.847 |
| H13CN(12 − 01) | 4.14 | 20 | 86 340.176 |
Notes.
(a)
See Sect. 4.4.2 for a definition of neff.
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