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Table 11
These parameters were used to generate the TRILEGAL galactic stellar models.
| Parameter | Value |
|
|
|
| Total field area | 1 deg2 |
| Limiting magnitude | R = 26 |
| Distance mod. resolution | 0.1 mag. |
| IMF | Chabrier Lognormal |
| Binary fraction | 0.3 |
| Binary mass ratios | 0.7 to 1.0 |
| Binary components | Combined (single entry) |
| Extinction | AV(∞) = 0.0378 |
| Extinction 1σ dispersion | 0 |
| Sun galactocentric radius | 8700 pc |
| Sun height above disc | 24.2 pc |
| Thin disc | |
| Vertical profile | sech2 |
| Scale height | h = z0(1 + t/t0)α |
| z 0 | 94.6902 pc |
| t 0 | 5.55079 Gyr |
| α |
|
| Radial profile | Exponential |
| Scale length | 2913.16 pc |
| Cutoffs | 0 pc, 15 000 pc |
| Local calibration Σd( ⊙) | 55.4082 M⊙/pc2 |
| SFR and AMR | 2-step SFR, Fuhrman AMR, |
| α enhanced | |
| SFR and AMR age | 0.73509t |
| Thick disc | |
| Vertical profile | sec h 2 |
| Scale height | h = 800 pc |
| Radial profile | Exponential |
| Scale length | 2394.07 |
| Cutoffs | 0 pc, 15 000 pc |
| Local calibration Ωtd( ⊙) | 0.0010 M⊙/pc3 |
| SFR and AMR | 11–12 Gyr constant, |
| Z = 0.008, | |
| σ [ M / H ] = 0.1 | |
| SFR and AMR age | t |
| Halo | |
| Shape | Oblate r1 / 4 spheroid |
| Effective radius rh | 2698.93 pc |
| Oblateness qh | 0.583063 |
| Local calibration Ωh( ⊙) | 0.000100397 M⊙/pc3 |
| SFR and AMR | 12–13 Gyr, |
| Ryan and Norris [M/H] | |
| SFR and AMR age | t |
| Bulge | |
| Shape | Triaxial bulge |
| Scale length am | 2500 pc |
| Truncation scale length a0 | 95 pc |
| y/x axial ratio η | 0.68 |
| z/x axial ratio ξ | 0.31 |
| Sun-GC-bar angle φ0 | 15° |
| Central calibration Ωb(GC) | 406.0 M⊙/pc3 |
| SFR and AMR | 10 Gyr |
| Zoccali et al. (2003) [M/H] + 0.3 | |
| SFR and AMR age | t − 2.0 Gyr |
Notes. These parameters were the default set for v1.6 of the model at the time of writing.
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