Table 3
NH3(2, 2) line parameters.
| Region | Positiona | VLSRb | TMB(m)c | ΔVd | τme | A τmf | N(2,2)g |
| (arcmin) | (km s-1) | (K) | (km s-1) | (K) | (1013 cm-2) | ||
|
|
|||||||
| M120.1+3.0-N | (2.8,1.4) | −18.4 ± 0.1 | 0.15 ± 0.06 | 0.9 ± 0.2 | 0.2 ± 0.1 | 0.17 ± 0.03 | 0.2 – 0.7 |
| (0,0) | – | ≤ 0.2 | – | – | – | – | |
| L1287 | (0,0) | −17.57 ± 0.02 | 0.98 ± 0.05 | 1.93 ± 0.04 | 0.27 ± 0.04 | 1.13 ± 0.02 | 2.9 – 4.8 |
| L1293 | (0,0) | – | ≤ 0.2 | – | – | – | – |
| HH 31 | (−7,0) | 6.94 ± 0.04 | 0.24 ± 0.06 | 0.51 ± 0.08 | 0.1 | 0.27 ± 0.04 | 0.2–0.4 |
| HH 265 | (−1.4,1.4) | – | ≤ 0.2 | – | – | – | – |
| IRAS 05358 | (0,0) | −16.79 ± 0.04 | 0.7 ± 0.1 | 2.6 ± 0.1 | 0.28 ± 0.05 | 0.83 ± 0.02 | 2.8–5.5 |
| L1641-S3 | (0,0) | +5.1 ± 0.1 | 0.3 ± 0.1 | 1.2 ± 0.1 | 0.1 ± 0.1 | 0.30 ± 0.03 | 0.5–1.0 |
| CB 34 | (0,0) | – | ≤ 0.1 | – | – | – | – |
| CB 54 | (0,0) | – | ≤ 0.2 | – | – | – | – |
| L379 | (0,0) | +18.80 ± 0.02 | 1.3 ± 0.1 | 3.45 ± 0.05 | 0.53 ± 0.02 | 1.7 ± 0.02 | 7.7–14.3 |
| IRAS 20050 | (0,0) | +6.46 ± 0.05 | 0.7 ± 0.1 | 1.9 ± 0.1 | 0.5 ± 0.1 | 0.93 ± 0.04 | 2.3–5.5 |
| CB 232 | (0,0) | – | ≤ 0.1 | – | – | – | – |
| IC 1396E | (0,0) | +0.42 ± 0.06 | 0.33 ± 0.06 | 2.4 ± 0.2 | 0.23 ± 0.06 | 0.37 ± 0.02 | 1.2–3.2 |
| L1221 | (0,0) | −4.49 ± 0.03 | 0.5 ± 0.1 | 1.0 ± 0.1 | 0.19 ± 0.03 | 0.55 ± 0.03 | 0.7–1.4 |
| NGC 7538 | (0,0) | −56.91 ± 0.03 | 0.76 ± 0.05 | 3.8 ± 0.1 | 0.13 ± 0.07 | 0.81 ± 0.01 | 4.0–5.9 |
Notes.
Optical depth of the (2, 2) main line derived from the ratio of the (1, 1) to (2, 2) antenna temperatures and the optical depth of the (1, 1) line, assuming the same excitation temperature for both transitions.
Beam-averaged column density for the rotational level (2, 2). Upper limit is derived from
assuming that both filling factor and excitation temperature are the same for the (1, 1) and (2, 2) transitions. If Tex ≫ Tbg, the beam-averaged column density is proportional to the “amplitude” A, and the explicit dependence on Tex disappears, reducing to
providing the lower limit for the beam-averaged column density (e.g., Ungerechts et al. 1986).
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