Table 1.
Conditions under which the different variants of the circular velocity curve are derived.
| Notation | Tracer | Radial motion | N points | X0 | Y0 | PA | i | σVlos |
|---|---|---|---|---|---|---|---|---|
| (pixel) | (pixel) | (°) | (°) | (km s−1) | ||||
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) |
| AR | VHα | No | 2818 | 38.2 | 37.1 | 207.1 | 52.9 | 6.36 |
| AR + E | VHα | Included | 2818 | 38.4 | 37.3 | 207.6 | 53.4 | 5.68 |
| BR | VHβ | No | 2818 | 38.1 | 37.9 | 206.4 | 54.2 | 11.26 |
| BR + E | VHβ | Included | 2818 | 37.9 | 37.9 | 207.9 | 53.9 | 10.32 |
| SR | Vstar | No | 2818 | 36.6 | 37.9 | 207.4 | 49.0 | 12.32 |
| SR + E | Vstar | Included | 2818 | 36.7 | 37.5 | 206.0 | 50.8 | 11.90 |
Notes. Columns are: the tracer of the rotation velocity (2), whether the radial motion is included or not (3), the number of points used in deriving the rotation velocity (4) and the obtained geometric parameters of UGC 4056 (the position of the centre of the galaxy on the MaNGA image X0 and Y0 (5,6), the position angle of the major axis PA (7), the galaxy inclination angle i (8), and the deviation σVlos given by Eqs. (5) and (9)). The number in parenthesis refers to the corresponding column.
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