Table 2
Parameters of C2H line fitting results.
| KNOT | α 2000 | δ 2000 | ηf ×(Tex−Tbg) × τstr | (v−vsys)str | FHWM str | τ str |
| h m s | o ′ ″ | (K) | (km s-1) | (km s-1) | – | |
|
|
||||||
| SB-I | 02h:42m:40.65s | −00°01′01.2″ | (2.8 ± 1.0) × 10-1 | 19 ± 8 | 139 ± 22 | 0.2 ± 0.6 |
| SB-II | 02h:42m:40.31s | −00°01′01.9″ | (5.3 ± 0.7) × 10-1 | 79 ± 3 | 63 ± 11 | 0.1 ± 0.2 |
| SB-III | 02h:42m:40.85s | −00°00′33.1″ | (6.6 ± 0.5) × 10-1 | −20 ± 2 | 34 ± 10 | 0.1 ± 0.3 |
| OUT-I | 02h:42m:40.76s | −00°00′48.0″ | (6.8 ± 0.3) × 10-1 | −41 ± 3 | 126 ± 10 | 0.1 ± 0.1 |
| OUT-II | 02h:42m:40.59s | −00°00′49.0″ | (4.1 ± 1.1) × 10-1 | −13 ± 5 | 135 ± 16 | 0.1 ± 1.9 |
| OUT-III | 02h:42m:40.96s | −00°00′45.5″ | (5.4 ± 1.6) × 10-1 | −37 ± 5 | 101 ± 12 | 1.3 ± 0.7 |
Notes. All the line parameters correspond to the strongest C2H(1−0) line (J = 3/2−1/2, F = 2−1) and are derived according to the procedure described in Sect. 3.3 as follows: Tex is the excitation temperature, Tbg is the background temperature (≃2.73 K), ηf is the unknown filling factor of the emission, (v−vsys)str is the velocity centroid of the line relative to 
= 1136 km s-1, FHWMstr is the half width at half maximum of the line, and τstr is the estimated peak opacity.
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