Table 2
Parallax and proper motion results.
| Maser | V LSR,maser | V LSR,thermal a | Parallax π | Distance d | μ x | μ y | |
| source | km s-1 | km s-1 | [mas] | [kpc] | [mas yr-1] | [mas yr-1] | |
|
|
|||||||
| G012.68−0.18 (W33 B) | 59.3 | ~55 | 0.416 ± 0.028 |
|
−1.00 ± 0.30 | −2.85 ± 0.29 | |
| G012.81−0.19 (W33 Main) | −1.4 | ~36 | 0.343 ± 0.037 |
|
−0.24 ± 0.17 | +0.54 ± 0.12 | |
| G012.81−0.19 (W33 Main) | 34.1 | ~36 | 0.343 ± 0.037 |
|
−0.60 ± 0.11 | −0.99 ± 0.13 | |
| G012.90−0.24 (W33 A) | 34.9 | ~36 | 0.408 ± 0.025 |
|
+0.19 ± 0.08 | −2.52 ± 0.32 | |
| G012.90−0.26 (W33 A) | 37.0 | ~37 | 0.396 ± 0.032 |
|
−0.36 ± 0.08 | −2.22 ± 0.13 | |
|
|
|||||||
| G012.88+0.48 | 29.4 | ~34 | 0.340 ± 0.036 | 2.94 |
+0.12 ± 0.13 | −2.66 ± 0.23 | |
Notes. Columns 6 and 7 give the proper motions in eastward and northward directions. The proper motions of the first maser are obtained from fitting a model of expanding outflows to all maser spots. The proper motions of the remaining sources are averages of the proper motions of all maser spots in each source.
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