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Table 1
All 22 GHz H2O maser features detected in NGC 7538-IRS 1.
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | (12) | (13) | |
| Maser | Group | RA | Dec | Peak flux | Vlsr | ΔvL | Pl | χ |
|
TbΔΩa |
|
θc | |
| offset | offset | Density(I) | |||||||||||
| (mas) | (mas) | (Jy beam-1) | (km s-1) | (km s-1) | (%) | (°) | (km s-1) | (log K sr) | (%) | (°) | |||
|
|
|||||||||||||
| W01 | N | −185.2131 | 141.908 | 17.11 ± 0.07 | −57.8 | 0.41 | − | − | − | − | − | − | |
| W02 | N | −176.4676 | 139.422 | 1.00 ± 0.02 | −58.3 | 0.32 | − | − | − | − | − | − | |
| W03 | N | −170.9744 | 139.088 | 0.48 ± 0.02 | −58.3 | 0.27 | − | − | − | − | − | − | |
| W04 | S | −57.6929 | −1071.104 | 0.90 ± 0.01 | −72.2 | 0.59 | − | − | − | − | − | − | |
| W05 | S | −57.4470 | −1056.554 | 0.48 ± 0.01 | −57.3 | 0.47 | − | − | − | − | − | − | |
| W06 | S | −57.3376 | −1056.630 | 36.43 ± 0.02 | −70.3 | 1.15 | 1.2 ± 0.1 | −13.0 ± 1.3 | − | − | − | − | |
| W07 | S | −57.1463 | −1057.065 | 16.99 ± 0.01 | −73.3 | 0.77 | 1.2 ± 0.1 | −10.8 ± 0.5 |
|
|
0.37 ± 0.13 |
|
|
| W08 | S | −56.7637 | −1056.586 | 0.15 ± 0.01 | −67.3 | 1.46 | − | − | − | − | − | − | |
| W09 | S | −56.4631 | −1070.080 | 0.48 ± 0.01 | −71.6 | 0.64 | − | − | − | − | − | − | |
| W10 | N | 0 | 0 | 7.34 ± 0.03 | −60.6 | 0.56 | − | − | − | − | − | − | |
| W11 | N | 85.5692 | −96.002 | 0.36 ± 0.02 | −59.7 | 0.44 | − | − | − | − | − | − | |
| W12 | N | 110.0019 | −13.538 | 0.20 ± 0.03 | −60.2 | 0.83 | − | − | − | − | − | − | |
| W13 | N | 111.6690 | −99.499 | 9.31 ± 0.03 | −60.1 | 0.47 | − | − | − | − | − | − | |
| W14 | N | 112.8442 | −156.492 | 0.25 ± 0.03 | −60.1 | 0.42 | − | − | − | − | − | − | |
| W15 | N | 151.9803 | −90.046 | 1.04 ± 0.03 | −59.9 | 0.40 | − | − | − | − | − | − | |
| W16 | N | 242.0042 | 148.947 | 0.13 ± 0.01 | −43.3 | 0.62 | − | − | − | − | − | − | |
| W17 | N | 242.7694 | 149.715 | 0.14 ± 0.01 | −43.8 | 0.59 | − | − | − | − | − | − | |
Notes.
(a)
The best-fitting results obtained by using a model based on the radiative transfer theory of H2O masers for Γ + Γν = 1s-1 (Surcis et al. 2011). The errors were determined by analyzing the full probability distribution function.
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