Table 2.
Parameters of the final model for each age component.
| Component | Mean age | ρ0 |
 |
 |
 |
 |
 |
σR(R0, 0) | σz(R0, 0) |
|---|---|---|---|---|---|---|---|---|---|
| (Gyr) | (M⊙ pc−3) | (km s−1) | (km s−1) | (pc) | (pc) | (pc) | (km s−1) | (km s−1) | |
| 1 | 0.075 | 1.968 × 10−3 | 16.7 | 5. | |||||
| 2 | 0.575 | 0.598 × 10−2 | 9.50 | 3.63 | 2852.0 | 9289.0 | 14508.0 | 14.47 | 8.60 |
| 3 | 1.500 | 0.446 × 10−2 | 15.49 | 5.92 | 2852.0 | 9979.0 | 13841.0 | 20.54 | 10.86 |
| 4 | 2.500 | 0.312 × 10−2 | 20.10 | 7.69 | 2852.0 | 8357.0 | 13063.0 | 25.39 | 12.59 |
| 5 | 4.000 | 0.556 × 10−2 | 25.54 | 9.77 | 2852.0 | 8357.0 | 13063.0 | 31.27 | 14.63 |
| 6 | 6.000 | 0.595 × 10−2 | 31.41 | 12.01 | 2852.0 | 8357.0 | 13063.0 | 37.92 | 16.80 |
| 7 | 8.500 | 0.110 × 10−1 | 37.52 | 14.35 | 2852.0 | 8357.0 | 13063.0 | 45.24 | 19.04 |
| ythd | 10.000 | 0.267 × 10−2 | 40.18 | 31.86 | 2080.0 | 5986.0 | 6703.0 | 54.66 | 40.53 |
Notes. The first column gives the disc component (index 1 to 7 for the thin disc, ‘ythd’ for the young thick disc). The second column indicates the mean age (Gyr) of the component in the population synthesis model. The third column gives the local density. The fourth to eighth columns give the Shu’s parameters corresponding to the radial and vertical velocity dispersions, scale lengths of density, radial dispersion, and vertical dispersion. The last columns indicate the values at the Sun position of σR and σz for each age subcomponent for comparison with other studies. The parameters of the first age component of the thin disc are not adjusted in our process because of the lack of axisymmetry.
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