Table 6
Properties of the transitions N → N′ used to model the C2H lines presented in Fig. 1.
| N | N ′ | ν | EN/k | A N → N′ | S N → N′ | g N |
| (MHz) | (K) | (s-1) | ||||
|
|
||||||
| 1 | 0 | 87 348.635 | 4.2 | 1.53 × 10-6 | 1 | 3 |
| 2 | 1 | 174 694.734 | 12.6 | 1.47 × 10-5 | 2 | 5 |
| 3 | 2 | 262 035.760 | 25.2 | 5.31 × 10-5 | 3 | 7 |
| 4 | 3 | 349 369.178 | 41.9 | 1.30 × 10-4 | 4 | 9 |
| 6 | 5 | 524 003.049 | 88.0 | 4.57 × 10-4 | 6 | 13 |
| 7 | 6 | 611 298.435 | 117.4 | 7.34 × 10-4 | 7 | 15 |
| 8 | 7 | 698 576.079 | 150.9 | 1.10 × 10-3 | 8 | 17 |
Notes. ν is the rest frequency of the transition, EN/k is the energy level of the upper level N of the transition divided by the Boltzmann constant k, AN → N′ is the Einstein-A coefficient of the transition, SN → N′ is the theoretical line strength of the line. gN is the statistical weight of the upper level N.
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