Table 2
Morphological structures.
| Label | Structure | θ (±2″) | PA (±2°) | i (±2°) | Vdep (±1 km s−1) | τk (±1800 yr) (a) |
|---|---|---|---|---|---|---|
| LL-NW, LL-SE | Large lobes | 52 | −29 | 118 | 354 | 4300 |
| ML-SE | Medium semi-lobe | 35 | −27 | 140 | 140 | 7300 |
| SL | Small semi-lobe | 37 | −38 | 170 | 124 | 8700 |
| CE | Central ellipsoid | 4 | −48 | 110 | 29 | 4000 |
| LK | Left knot (north) | 47 | −25 | 115 | 350 | 3900 |
| RK | Right knot (north) | 49 | −34 | 116 | 350 | 4000 |
Notes. For the label and geometry of the structures refer to Fig. 1. Parameters: θ is the polar or semi-major axis for lobes, semi-major axis for the central ellipsoid, and angular distance for the knots. PA and i denote the direction (position angle and inclination with respect to the line of sight) of the radial vector for the knots and the semi-major axis for the rest of the structures. Furthermore, Vdep represents the deprojected polar velocity for structures and deprojected velocity for the knots, with respect to the systemic velocity, while τk indicates the kinematical age of each structure based on its radial velocity and physical size, using the distance to M 1–16 of 6.2 ± 1.9 kpc (Frew et al. 2016) and the formulation from Guillén et al. (2013). (a)Mean value of the uncertainty (from 1200 up to 2700 as minimum and maximum values, respectively).
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