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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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