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Table 2
Spectroscopic parameters for the C3 and CCH transitions observed with Herschel/HIFI.
| Species | Transition | Frequency | A-coeff | E l | Beam size |
| (MHz) | (s-1) | (cm-1) | |||
|
|
|||||
| C3, (J, v) | (9, 1)–(10, 0) P(10) | 1 654 081.66 | 2.38 × 10-3 | 47.3 | 13″ |
| (3, 1)–(4, 0) P(4) | 1 787 890.57 | 2.72 × 10-3 | 8.6 | 12″ | |
| (2, 1)–(2, 0) Q(2) | 1 890 558.06 | 7.51 × 10-3 | 2.6 | 11″ | |
| (4, 1)–(4, 0) Q(4) | 1 896 706.56 | 7.58 × 10-3 | 8.6 | 11″ | |
|
|
|||||
| CCH, NJ,F | 613/2,7–511/2,6 | 523 971.5704 | 4.58 × 10-4 | 43 | 40″ |
| 613/2,6–511/2,5 | 523 972.1630 | 4.53 × 10-4 | 43 | 40″ | |
| CCH, NJ,F | 611/2,6–511/2,5 | 524 033.9075 | 4.51 × 10-4 | 43 | 40″ |
| 611/2,5–59/2,4 | 524 034.5305 | 4.43 × 10-4 | 43 | 40″ | |
Notes.
(*)
Herschel/HIFI beam sizes are taken from Roelfsema et al. (2012).
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