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Table 1
Spectroscopic and Gaussian-fit parameters of the C2H lines observed toward the CO+ peak of the Orion Bar.
| Transition | A ij | E u | ν |
|
V LSR | ΔV | T peak | rms | ΘB |
| (s-1) | (K) | (MHz) | (K km s-1) | (km s-1) | (km s-1) | (K) | (K) | (′′) | |
|
|
|||||||||
| N = 6−5, J = 13/2−11/2 | 4.54 × 10-4 | 88.0 | 523 971.6 | 3.64 ± 0.03 | 10.59 ± 0.08 | 2.65 ± 0.03 | 1.29 | 0.02 | 40.5 |
| N = 6−5, J = 11/2−9/2 | 4.46 × 10-4 | 88.0 | 524 033.9 | 2.95 ± 0.03 | 10.58 ± 0.01 | 2.61 ± 0.03 | 1.06 | 0.02 | 40.5 |
| N = 7−6, J = 15/2−13/2 | 7.30 × 10-4 | 117.4 | 611 267.2 | 2.38 ± 0.16 | 10.77 ± 0.07 | 2.44 ± 0.19 | 0.91 | 0.13 | 34.7 |
| N = 7−6, J = 13/2−11/2 | 7.21 × 10-4 | 117.4 | 611 329.7 | 2.06 ± 0.14 | 10.70 ± 0.03 | 2.50 ± 0.20 | 0.78 | 0.11 | 34.7 |
| N = 8−7, J = 19/2−17/2 | 1.10 × 10-3 | 150.9 | 698 544.8 | 1.32 ± 0.09 | 10.67 ± 0.07 | 2.12 ± 0.17 | 0.59 | 0.09 | 30.4 |
| N = 8−7, J = 17/2−15/2 | 1.09 × 10-3 | 150.9 | 698 607.5 | 1.23 ± 0.10 | 10.67 ± 0.08 | 2.23 ± 0.21 | 0.52 | 0.10 | 30.4 |
| N = 9−8, J = 19/2−17/2 | 1.58 × 10-3 | 188.6 | 785 802.1 | 1.21 ± 0.09 | 10.35 ± 0.09 | 2.51 ± 0.23 | 0.45 | 0.08 | 27.0 |
| N = 9−8, J = 17/2−15/2 | 1.57 × 10-3 | 188.6 | 785 865.0 | 0.96 ± 0.10 | 10.56 ± 0.12 | 2.44 ± 0.28 | 0.37 | 0.09 | 27.0 |
| N = 10−9, J = 21/2−19/2 | 2.18 × 10-3 | 230.5 | 873 036.4 | 0.82 ± 0.10 | 11.12 ± 0.15 | 2.23 ± 0.30 | 0.35 | 0.11 | 24.3 |
| N = 10−9, J = 19/2−17/2 | 2.16 × 10-3 | 230.5 | 873 099.5 | 1.25 ± 0.11 | 10.11 ± 0.18 | 3.00 ± 0.50 | 0.30 | 0.09 | 24.3 |
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