Table 2.
Summary of our main results.
| Model name | ⟨Δτ⟩ (Gyr) | ⟨Δτ⟩m (Gyr) | ⟨τBE/τSSE⟩ | ⟨τBE/τSSE⟩m | ΔT (Gyr) | ΔTm (Gyr) | Integrated merger |
|---|---|---|---|---|---|---|---|
rate  |
|||||||
| Default | 0.84 | 1.03 | 3.88 | 11.35 | 0.292 | 0.388 | 0.024 |
| α-noncon | −0.01 | 0.89 | 3.16 | 10.34 | 0.084 | 0.326 | 0.024 |
| α-ineff | 1.08 | 0.48 | 3.13 | 4.98 | 0.433 | 0.207 | 0.032 |
| α-eff | 0.56 | 1.21 | 3.53 | 14.0 | 0.183 | 0.298 | 0.020 |
| αγ | 0.58 | 0.92 | 3.13 | 10.54 | 0.193 | 0.293 | 0.021 |
| DM91 | 0.98 | 1.14 | 5.01 | 12.49 | 0.174 | 0.31 | 0.013 |
Notes. The first column shows the mean WD formation time difference (that is the mean of Δτ ≡ τBE − τSSE(MWD)). Similarly, ⟨τBE/τSSE⟩ indicates the mean ratio of the BE time to the corresponding inferred SSE time. The quantity ΔT denotes the difference between the median value of the true age and the corresponding apparent age distribution, inferred assuming single stellar progenitor evolution (see also Sect. 4.1). Lastly, the merger rate is defined as the predicted number of mergers (of any type) leading to a single WD after a burst of star formation 10 Gyr ago per solar mass of created stars. In this table, a quantity with subscript “m” indicates that this quantity is calculated for the massive (M ≥ 0.9 M⊙) WDs in our models.
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