Table 1.
Free parameters in our analytical model of inference.
| Ψbulk | Bulk phase-space density parameters |
| ak | Weights of the bulk density Gaussian mixture model |
| σz, k, σw, k | Dispersions of the bulk density Gaussian mixture model |
| Ψspiral | Spiral phase-space density parameters |
| ρh | Matter density parameters that determine the gravitational potential |
| t | Time since the perturbation was produced |
 |
Initial angle of the perturbation |
| α, β | Amplitudes of the anti-symmetric and symmetric spiral components |
| Ψ⊙ | Solar phase-space parameters |
| Z⊙ | Height of the Sun above the Galactic plane |
| W⊙ | Vertical velocity of the Sun in the Galactic disk rest frame |
Notes. These parameters are split into three groups, Ψ = {Ψbulk, Ψspiral, Ψ⊙}, which correspond to: (i) the parameters that determine the bulk phase-space density; (ii) the relative phase-space density perturbation of the spiral; and (iii) the solar phase-space parameters. The total number of free parameters is equal to 10 + 3K, where K is the number of Gaussian components in the bulk stellar density.
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