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Table 5
Parameter fit for a dual halo.
| Parameter | Range | Range | Best value | |
| Min | Max | |||
|
|
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| Halo: | ||||
| Inner halo exponent | 2.2 | 4.5 | 3.393 | |
| Inner halo axis ratio | 0.3 | 1.2 | 0.766 | |
| Outer halo exponent | 2.2 | 4.5 | 3.594 | |
| Outer halo axis ratio | 0.3 | 1.2 | 0.766 | |
| Rbreak (kpc) | 25. | 150. | 49.9 | |
| Inner halo normalisation | 0. | 4. | 2.81 | |
|
|
||||
| Thick disc: | ||||
| IMF slope | –1. | 1. | –0.25 | |
| scale height (pc) | 400 | 1300 | 536.1 | |
| normalisation | 0. | 3. | 1.68 | |
| scale length (pc) | 1500 | 5000 | 2369. | |
| ξ (pc) | 100 | 1500 | 652.4 | |
| flare start radius (pc) | 7000 | 20000 | 9256. | |
| flare slope (kpc-1) | –0.3 | 0.3 | 0.211 | |
|
|
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| Lr | –64019. | |||
| BIC | 128163. | |||
Notes. The 2nd and 3rd columns give the range of values explored by the ABC-MCMC method. The 4th column gives the best-likelihood value. BIC is −2 ∗ Lr + k ∗ ln(n) as explained in the text.
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