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Table 6.
Individual H2O maser features around VLA 2 for which the velocity of the pumping shock is measured.
| (1) | (2) | (3) | (4) | (5) | |
|---|---|---|---|---|---|
| Epoch | Maser | Vlsr(a) | Peak | Proper motion | |
| feature | intensity (I) | ||||
| (km s−1) | (Jy beam−1) | (mas yr−1) | (km s−1) | ||
| VLA 2 – zone 2 – below linear fit | |||||
| 2014.46 | VLA2.1.04 | +4.26 | 5.78 ± 0.02 | − | − |
| 2016.45 | VLA2.2.07 | +5.63 | 0.67 ± 0.02 | 4.8 | 29.6 |
| 2018.44 | VLA2.3.06 | +6.27 | 5.86 ± 0.03 | 4.5 | 27.8 |
| 2020.82 | VLA2.4.13 | +0.65 | 0.38 ± 0.05 | 4.7 | 29.0 |
| 4.6 (b) | 28.4 (b) | ||||
| VLA 2 – zone 3 – group 3A | |||||
| 2014.46 | VLA2.1.22 | +5.61 | 2.77 ± 0.01 | − | − |
| 2016.45 | VLA2.2.18 | +5.87 | 1.58 ± 0.02 | 2.0 | 12.3 |
| 2018.44 | VLA2.3.32 | +5.90 | 0.90 ± 0.02 | 2.0 | 12.3 |
| 2.0 (c) | 12.3 (c) | ||||
| VLA 2 – zone 3 – group 3B | |||||
| 2014.46 | VLA2.1.09 | +21.19 | 0.27 ± 0.01 | − | − |
| 2016.45 | VLA2.2.12 | +13.45 | 10.42 ± 0.52 | 5.0 | 30.8 |
| 2018.44 | VLA2.3.13 | +12.80 | 9.10 ± 0.10 | 7.5 | 46.2 |
| 6.2 (c) | 38.3 (c) | ||||
| VLA 2 – zone 3 – group 3C | |||||
| 2014.46 | VLA2.1.03 | +14.90 | 20.80 ± 0.25 | − | − |
| 2018.44 | VLA2.3.09 | +14.69 | 4.77 ± 0.13 | 1.3 | 8.0 |
Notes.
(a)
The assumed systemic velocity of the region is Vlsr = +10.0 km s−1 (Shepherd et al. 2003).
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