Table D.1.
Systematic differences in physical parameter estimates due to different modelling assumptions within our BaStA code.
| CB19 - CB16 | CB16 - BC03 | Sandage - Exponential | var Z - fix Z | overall new - old | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| <Δ> | rms | <Δ> | rms | <Δ> | rms | <Δ> | rms | <Δ> | rms | <error> | ||
| log(Z*/Z⊙) | SF | 0.01 | 0.14 | 0.16 | 0.14 | 0.08 | 0.13 | 0.09 | 0.05 | 0.34 | 0.21 | 0.34 |
| Q | 0.01 | 0.05 | 0.12 | 0.10 | 0.09 | 0.13 | 0.07 | 0.04 | 0.29 | 0.16 | 0.17 | |
| log(Ager/yr) | SF | 0.04 | 0.06 | −0.05 | 0.13 | −0.11 | 0.20 | 0.00 | 0.02 | −0.13 | 0.13 | 0.16 |
| Q | 0.05 | 0.06 | −0.12 | 0.09 | −0.13 | 0.10 | 0.01 | 0.02 | −0.18 | 0.12 | 0.16 | |
| log(M*/M⊙) | SF | 0.06 | 0.08 | 0.07 | 0.04 | −0.06 | 0.13 | −0.03 | 0.03 | 0.03 | 0.09 | 0.13 |
| Q | 0.05 | 0.05 | 0.04 | 0.07 | −0.10 | 0.07 | 0.00 | 0.02 | −0.01 | 0.10 | 0.12 | |
| Ag | SF | 0.12 | 0.19 | 0.08 | 0.12 | 0.06 | 0.30 | −0.05 | 0.06 | 0.21 | 0.35 | 0.37 |
| Q | 0.08 | 0.10 | 0.09 | 0.09 | −0.03 | 0.19 | −0.03 | 0.12 | 0.10 | 0.22 | 0.23 | |
Notes. We consider the effect of assumptions on the following ingredients: i) stellar library and evolutionary tracks in SPS models, done comparing CB19 with CB16 (evolutionary tracks) and CB16 with BC03 (stellar library); ii) parameters of SFH (sandage - exponential); iii) metallicity evolution versus constant metallicity (var Z - fix Z); iv) overall difference between new and old model library. For each ingredient we report the mean and rms scatter of the differences in the derived physical parameters for quiescent and star-forming galaxies separately in the silver sample. These are compared to the average parameter uncertainty in our default fit (last column).
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