Table 2.
Parameters derived from the kinematic fitting described in Sect. 3.4.
| Stellar component | Hα component | CO component | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Model | (A) | (B) | (C) | (D) | (a) | (b) | (c) | (d) | (e) | (α) | (β) | (γ) |
 (1) |
1.21 | 1.23 | 1.27 | 1.36 | 43.7 | 44.2 | 46.7 | 44.6 | 46.9 | 1836 | 1870 | 2007 |
| incl(2) [°] | 20.3 | 20.0 | 20.1 | 19.9 | 37.9 |  |
 |
 |
 |
35.0 |  |
 |
| vsyst (3) [km s−1] | 514.2 | 513.4 | 513.0 | 512.8 | 513.8 | 513.9 | 518.0 | 513.3 | 516.1 | 512.7 | 512.5 | 512.9 |
| xc (4) [α2000 / arcsec] | 13:37:00.43 |  |
 |
 |
+0.7 | +0.7 | +2.0 |  |
 |
+2.8 | −1.6 |  |
| yc (5) [δ2000 / arcsec] | −29:51:56.2 |  |
 |
 |
+2.0 | +2.0 | −6.5 |  |
 |
+3.0 | −1.8 |  |
| PA(6) [°] | 223.1 | 223.0 | 223.0 | 222.9 | 225.8 | 225.8 | 225.9 | 225.8 | 225.9 | 225.0 | 225.0 | 224.8 |
| ΔVrot (7) [km s−1] | −1.4 | 0.0 | 0.9 | 1.6 | 5.9 | 9.8 |  |
10.7 |  |
−1.6 | −2.1 | −2.3 |
Notes. (1)Reduced χ2 obtained in fitting the velocity model to the observed velocity field. (2)Galaxy inclination. (3)Heliocentric systemic LoS velocity. (4, 5)For Col. (A), right ascension α and declination δ of the kinematic centre. For the next columns: shift in α and δ (in arcsec) from the reference centre given in Col. (A). (6)Position angle of the major axis of the velocity field. (7)Mean velocity difference between both sides of the rotation curve. The parameters framed in a box are those that are fixed for the fit. (A)Best Fit Model, all nine parameters are free to vary: five parameters for the disk (incl, vsyst, xc, yc and PA) and four for the two 2D-Plummer functions (not shown). (B)All the parameters are free, except xc and yc that are fixed to the centre of the yellow box in Fig. A.3 (i.e. the kinematic centre from Fabry-Perot data, Fathi et al. 2008). (C)All the parameters are free, except xc and yc that are fixed to the centre of the grey box in Fig. A.3 (i.e. the Pa β kinematic centre, Knapen et al. 2010). (D)All the parameters are free, except xc and yc that are fixed to the grey cross in Fig. A.3 (i.e. the corner of the errorbox given by Knapen et al. 2010 that is the furthest away from the centre determination obtained in model (A)). (a)Same as model (A). (b)All the parameters are free, except incl (fixed to the value of stellar component). (c)All the parameters are free, except incl (fixed to the value of stellar component) and ΔVrot (fixed to 0). (d)All the parameters are free, except incl, xc and yc (fixed to the value of stellar component). (e)Same as (d), except Δ(Vrot) that is fixed. (α)Same as model (A). (β)All the parameters are free, except incl (fixed to the value of stellar component). (γ)All the parameters are free, except incl, xc and yc (fixed to the value of stellar component).
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