Table 5
Properties of the Gaussian mixture models with lowest Bayesian information criteria for the off-centred envelope and the symmetric halo.
| Property | Halo | N | Mean | Sigma | Weight |
| (1) | (2) | (3) | (4) | (5) | (6) |
|
|
|||||
| log Age | Envelope | 18 | 10.13 | 0.05 | 1.0 |
| (Gyr) | Sym. Halo | 48 | 10.13 | 0.04 | 1.0 |
| - - - - - - | |||||
| [Z/H] | Envelope | 20 | 0.10 | 0.33 | 1.0 |
| Sym. Halo | 52 | −0.24 | 0.64 | 1.0 | |
| - - - - - - | |||||
| [α/Fe] | Envelope | 19 | 0.37 | 0.08 | 0.74 |
| −0.14 | 0.13 | 0.26 | |||
| Sym. Halo | 48 | 0.39 | 0.09 | 0.57 | |
| −0.04 | 0.16 | 0.43 | |||
| - - - - - - | |||||
| [Fe/H] | Envelope | 20 | −0.12 | 0.41 | 1.0 |
| Sym. Halo | 49 | −0.38 | 0.68 | 1.0 | |
Notes. (1) Stellar population parameters. (2) External halo component (R>Re), defined as an envelope for the NE quadrant of our observation, and a symmetric halo otherwise. (3) Number of data points used in the statistics. (4), (5) Mean and standard deviation of the Gaussian mixture model component. (6) Weight of the component in the Gaussian mixture model.
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