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Table 3.
Parameters and evidence resulting from the application of the Bayesian analysis to the whole FORS2/MXU sample of members, as well as divided in metal-rich (MR) and metal-poor (MP) samples.
| Sample | Method | vhel | σv | k | vc | θ | Bayes factor |
|---|---|---|---|---|---|---|---|
| [km s−1] | [km s−1] | [km s−1 arcmin−1] | [km s−1] | [°] | |||
| Linear rotation | −142.2 |
10.3 |
−5.0 |
139.0 |
lnBlin, flat = 1.7 | ||
| All | Flat rotation | −142.4 |
11.2 |
−7.1 |
135.6 |
lnBrot, disp = 1.6 | |
| Dispersion-only | −141.5 |
12.0 |
|||||
| Linear rotation | −141.1 |
8.2 |
−3.7 |
87 |
lnBlin, flat = 0.5 | ||
| MR | Flat rotation | −140.6 |
8.7 |
−4.3 |
76 |
lnBrot, disp = −1.8 | |
| Dispersion-only | −140.9 |
9.1 |
|||||
| Linear rotation | −142.9 |
13.1 |
−5.8 |
145 |
lnBlin, flat = −0.8 | ||
| MP | Flat rotation | −144.6 |
12.9 |
−14.5 |
157 |
lnBrot, disp = 0.6 | |
| Dispersion-only | −142.3 |
15.4 |
|||||
Notes. The systemic velocity of the HI gas is −140 km s−1 (Iorio et al. 2017), perfectly compatible with our values.
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