Table 3
Parameters of the hyperfine components of NH3 inversion lines observed around W51 Main.
| Line | ΔνHF | ΔVHF | a ms | Fpeak | ΔV1/2 | Fint | Vc | Peak opacity | ||
| (J,K) | (MHz) | (km s-1) | (Jy) | (km/s) | (Jy km/s) | (km/s) | (τ) | |||
| Inner | Outer | Inner | Outer | |||||||
|
|
||||||||||
| W51e2-W (HC HII) | ||||||||||
| (6, 6) | ±2.24 | ±2.62 | ±26.9 | ±31.4 | 0.0081 | -0.162 ±0.001 | 4.29±0.04 | -0.74 ±0.01 | 57.55±0.01 | 81 ± 9 |
| (7, 7) | ±2.34 | ±2.68 | ±27.3 | ±31.2 | 0.0060 | -0.0642±0.0009 | 4.52 ±0.12 | -0.31±0.01 | 57.22±0.03 | 39 ± 8 |
| (9, 9) | ±2.48 | ±2.75 | ±27.0 | ±30.1 | 0.0037 | -0.0097±0.0003 | 3.60±0.20a | -0.067±0.003 | 57.36±0.16 | 12 ± 9 |
| W51e2-E (protostar) | ||||||||||
| (6, 6) | ±2.24 | ±2.62 | ±26.9 | ±31.4 | 0.0081 | 0.0225 ± 0.0003 | 9.02 ± 0.12 | 0.217 ± 0.004 | 56.40 ± 0.09 | 89 ± 86 |
| (7, 7) | ±2.34 | ±2.68 | ±27.3 | ±31.2 | 0.0060 | 0.0104 ± 0.0002 | 9.56 ± 0.24 | 0.106 ± 0.003 | 56.39 ± 0.18 | 43 ± 59 |
| (9, 9) | ±2.48 | ±2.75 | ±27.0 | ±30.1 | 0.0037 | 0.0034 ± 0.0002 | 6.93± 0.59 | 0.025 ± 0.003 | 56.47 ± 0.43 | 43 ± 124 |
| W51e2-NW (protostar) | ||||||||||
| (6, 6) | ±2.24 | ±2.62 | ±26.9 | ±31.4 | 0.0081 | 0.0150±0.0005 | 8.54±0.32 | 0.136±0.007 | 55.27±0.22 | 20 ± 15 |
| (7, 7) | ±2.34 | ±2.68 | ±27.3 | ±31.2 | 0.0060 | 0.0043±0.0004 | 8.83±1.03 | 0.040±0.006 | 54.13±0.76 | 10 ± 16 |
| (9, 9) | ±2.48 | ±2.75 | ±27.0 | ±30.1 | 0.0037 | – | – | – | – | – |
| W51e2-E+NW (entire core) | ||||||||||
| (6, 6) | ±2.24 | ±2.62 | ±26.9 | ±31.4 | 0.0081 | 0.0675 ± 0.0009 | 9.6±0.16 | 0.692 ± 0.014 | 55.28 ±0.11 | 21 ± 2 |
| (7, 7) | ±2.34 | ±2.68 | ±27.3 | ±31.2 | 0.0060 | 0.0186±0.0008 | 9.1±0.5 | 0.180±0.012 | 56.39 ±0.35 | 10 ± 16 |
| (9, 9) | ±2.48 | ±2.75 | ±27.0 | ±30.1 | 0.0037 | – | – – | – | – | – |
| W51e8 | ||||||||||
| (6, 6) | ±2.24 | ±2.62 | ±26.9 | ±31.4 | 0.0081 | 0.0469±0.0004 | 14.1±0.4 | 0.705±0.007 | 59.85±0.18 | 23 ± 3 |
| (7, 7) | ±2.34 | ±2.68 | ±27.3 | ±31.2 | 0.0060 | 0.0267±0.0009 | 9.2±0.4 | 0.260±0.01 | 60.03±0.30 | 25 ± 3 |
| (9, 9) | ±2.48 | ±2.75 | ±27.0 | ±30.1 | 0.0037 | 0.0083±0.0006 | 14.1±0.4 | 0.129±0.009 | 63.5±1.3 | 28 ± 6 |
Notes. Frequency separations (ΔνHF, Cols. 2 and 3) of the four satellite components were calculated using Eq. (B.1). The corresponding velocity separations (ΔVHF) are also reported in Cols. 4 and 5. ams (Col. 6) is the theoretical ratio of the satellite line to the main line strengths calculated using Eqs. (B.2). Fpeak, Fint, and ΔV1/2 were fitted simultaneously for all the hyperfine quadrupole satellite components assuming a Gaussian shape for each of the hyperfine lines. The values reported in the table are average values of the four Gaussians fitted to the HFS satellites. τ (Col. 11) is the line opacity estimated numerically with Eq. (A.1) from Paper I.
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