Table 2
Parameters of the maser streamlines.
| Sinusoidal fit | |||||
|---|---|---|---|---|---|
| Stream | ℜ | fɀ | xl0 | wK | RK |
| (au) | (rad au−1) | (au) | (km s−1 au−1) | (au) | |
| B1 | 15.7 ± 0.3 | 0.047 ± 0.001 | 28.5 ± 0.9 | 2.17 ± 0.23 | 10.8 ± 0.8 |
| B2 | 19.9 ± 0.4 | 0.034 ± 0.001 | 17.5 ± 0.9 | 0.91 ± 0.20 | 19.2 ± 2.8 |
| R1 | 39.3 ± 0.2 | 0.018 ± 0.001 | −165.4 ± 0.5 | 0.22 ± 0.03 | 49 ± 5 |
Notes. Column 1 denotes the maser stream. Columns 2, 3, and 4 report the amplitude, the spatial frequency, and the position of the zero phase, respectively, of the sinusoidal fit of the maser coordinates R versus xl. The spatial frequency fɀ has been corrected by projection effects caused by the inclination of the jet axis (ijet = 15°) using the expression fɀ = π/(((π/fxl) + 2 ℜ sin(ijet))/ cos(ijet)), where fxl is the original value from the sinusoidal fit. Columns 5 and 6 list the derived Keplerian angular velocity and launch radius.
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