Table 4
Spearman rank correlation coefficients for Arot/σ0.
| Parameter | Spearman sa | |t|b | Nclusc | Ptd |
|
|
||||
| (B − R)/(B + R + V) | –0.769 | 5.526 | 23 | 2 × 10-5 |
| [Fe/H] | 0.492 | 2.652 | 24 | 0.015 |
| IQR | –0.336 | 1.595 | 22 | 0.126 |
| Z | 0.271 | 1.322 | 24 | 0.200 |
| RGC | –0.211 | 1.014 | 24 | 0.321 |
| logρ0 | –0.196 | 0.936 | 24 | 0.359 |
|
–0.188 | 0.835 | 21 | 0.414 |
|
–0.187 | 0.829 | 21 | 0.417 |
| ell | 0.145 | 0.673 | 23 | 0.508 |
| MV | –0.076 | 0.360 | 24 | 0.722 |
| σ0 | –0.010 | 0.049 | 24 | 0.961 |
Notes.
Absolute value of the associated t variable as defined in Press et al. (1992).
Number of clusters involved in the correlation. t is approximately distributed as a Student distribution with Nclus − 2 degrees of freedom (Press et al. 1992).
Probability to obtain a value of s higher than or equal to observed, in absolute value [i.e. P(|s| ≥ |sobs|)] from two independent variables (i.e. in absence of correlation), from a Student test.
Peri-galactic distance (Rper) and maximum distance above the Galactic plane (Zmax) are taken from Dinescu et al. (1999); Casetti-Dinescu et al. (2007), as in Carretta et al. (2010a).
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