Table 1
Fitted parameters of the polarized 22 GHz H2O maser features.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maser ID | RA offset (mas)(a) | Dec offset (mas)(a) | Maser stream | Peak flux density(I) (Jy beam−1) | VLSR (km s−1) | P1 (%) | χ (º) | ∆Vi (km s−1)(b) | Tb∆Ω (log K sr)(b) | PV (%) | BLOS (mG) | θ (º) | prob. B|| (%) |
| 1 | 0 | 0 | – | 53.066 | −21.6 | 0.57 ± 0.01 | +46 ± 6 |  |
 |
– | – |  |
94 |
| 2 | +60.42 ± 0.03 | +27.87 ± 0.03 | NE-2 | 14.326 | −3.0 | 0.3 ± 0.1 | +36 ± 47 |  |
 |
– | – |  |
60 |
| 3 | −14.93 ± 0.03 | +51.87 ± 0.03 | N | 14.017 | −24.0 | 1.09 ± 0.23 | +29 ± 2 |  |
 |
– | – |  |
53 |
| 4 | −1.55 ± 0.03 | +58.23 ± 0.03 | N | 10.457 | −28.5 | 0.4 ± 0.1 | +40 ± 20 |  |
 |
0 4±0 1 | −160 ± 80 |  |
80 |
| 5 | −42.37 ± 0.03 | −36.16 ± 0.03 | SW | 7.082 | +0.4 | 0.5 ± 0.2 | +22 ± 14 |  |
 |
– | – |  |
62 |
| 6 | +56.89 ± 0.03 | +18.87 ± 0.03 | NE-2 | 6.565 | −1.0 | 0.3 ± 0.1 | +56 ± 15 |  |
 |
1 4 ± 0 2 | −457 ± 144 |  |
62 |
| 7 | +23.06 ± 0.03 | −4.24 ± 0.03 | NE-3 | 6.502 | −15.2 | 0.41 ± 0.06 | +10±4 |  |
 |
0 7±0 2 | +319 ± 188 |  |
63 |
| 8 | −1.29 ± 0.03 | +59.10 ± 0.03 | N | 5.543 | −30.2 | 0.3 ± 0.1 | +38 ± 27 |  |
 |
– | – |  |
65 |
| 10 | +33.59 ± 0.03 | +3.34 ± 0.03 | NE-3 | 4.866 | −15.1 | 0.45 ± 0.19 | +71 ± 8 |  |
 |
1 3 ± 0 2 | +441 ± 154 |  |
72 |
| 11 | +58.57 ± 0.03 | +32.40 ± 0.03 | NE-1 | 4.812 | −19.8 | 0.39 ± 0.05 | +32 ± 6 |  |
 |
– | – |  |
43 |
| 12 | −14.78 ± 0.03 | +52.52 ± 0.03 | N | 4.395 | −24.8 | 1.35 ± 0.33 | +11 ± 2 |  |
 |
– | – |  |
0 |
| 13 | −43.75 ± 0.03 | −40.90 ± 0.03 | SW | 4.273 | +5.0 | 0.3 ± 0.1 | +54 ± 6 |  |
 |
1 4 ± 0 1 | -497 ± 211 |  |
61 |
| 14 | +60.79 ± 0.03 | +28.54 ± 0.03 | NE-2 | 4.072 | −3.2 | 0.6 ± 0.1 | +39 ± 5 |  |
 |
– | – |  |
68 |
| 16 | +61.14 ± 0.03 | +31.34 ± 0.03 | NE-2 | 3.397 | +1.5 | 3.2 ± 0.2 | +27 ± 4 |  |
 |
– | – |  |
100 |
| 17 | −41.84 ± 0.03 | −34.58 ± 0.03 | SW | 3.387 | −0.1 | 0.4 ± 0.1 | +87 ± 23 |  |
 |
– | – |  |
42 |
| 18 | +33.76 ± 0.03 | +3.88 ± 0.03 | NE-3 | 3.206 | −15.4 | 0.49 ± 0.08 | +58 ± 8 |  |
 |
1 0 ± 0 2 | +384 ± 242 |  |
43 |
| 19 | −11.28 ± 0.03 | +22.53 ± 0.03 | N | 3.177 | −22.7 | 0.61 ± 0.07 | −22 ± 7 |  |
 |
– | – |  |
0 |
| 20 | +53.03 ± 0.03 | +19.32 ± 0.03 | NE-1 | 2.485 | −11.7 | 0.6 ± 0.1 | −30 ± 9 |  |
 |
1 7 ± 0 2 | +496 ± 308 |  |
63 |
| 24 | −44.37 ± 0.03 | −39.19 ± 0.03 | SW | 2.072 | +4.3 | 0.6 ± 0.1 | +32 ± 5 |  |
 |
– | – |  |
58 |
| 25 | +25.54 ± 0.03 | −3.08 ± 0.03 | NE-3 | 2.062 | −16.2 | – | – | – | – | 1.8 ± 0.4(c) | +715 ± 499(c) | – | – |
| 27 | +60.50 ± 0.03 | +38.38 ± 0.03 | NE-2 | 1.926 | −6.2 | 0.8 ± 0.1 | +34 ± 12 |  |
 |
– | – |  |
19 |
| 30 | +62.36 ± 0.03 | +37.98 ± 0.03 | NE-2 | 1.631 | −10.8 | 2.2 ± 0.2 | −15±4 |  |
 |
– | – |  |
64 |
| 31 | −43.54 ± 0.03 | −40.37 ± 0.03 | SW | 1.537 | +5.2 | 0.7 ± 0.1 | +66 ± 22 |  |
 |
– | – |  |
84 |
| 36 | +61.04 ± 0.03 | +38.18 ± 0.03 | NE-2 | 0.954 | −8.1 | 1.4 ± 0.2 | +38 ± 9 |  |
 |
– | – |  |
0 |
| 40 | +59.72 ± 0.03 | +27.76 ± 0.03 | NE-2 | 0.756 | +0.4 | 1.8 ± 0.2 | +58 ± 10 |  |
 |
– | – |  |
100 |
Notes. Columns 1–3, 5, and 6 report the label number, the position (RA and Dec) relative to the reference feature, the intensity, and the VLSR of the water masers from Moscadelli et al. (2022, see Supplementary Table 1). Column 4 reports the streamline to which the maser belongs. Columns 7 and 11 list the measured level of linear and circular polarization, respectively, and Col. 8 the PA of the linear polarization. Columns 9, 10, 12, and 13 provide the model-derived values of the intrinsic maser line width, ∆Vi, the product of the maser brightness temperature and beaming angle, Tb∆Ω, the LOS component of the magnetic field, and the angle, θ, between the magnetic field and the LOS, respectively. Column 14 reports the estimated probability that the magnetic field is oriented parallel to the linear polarization. (a)The reference position is RA(2000) = 21h09m21s.7099 and Dec(2000) = 52º22′37″.001. (b)The best-fitting results obtained using a model based on the radiative transfer theory of H2O masers for Γ + Γν = 1 s−1 (Surcis et al. 2011a), where Γ is the maser decay rate and Γν the cross-relaxation rate. (c)In the fitting model, we include the values 〈Tb∆Ω〉 = 9.9 × 108 K sr and 〈∆Vi〉 = 3.3 km s−1 that best fit the total intensity emission.
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