Table 4
Proportion of WDs from 0.3−1 M⊙ progenitors (initially 300 000 stars), their mass domain, and their mean value as a function of the Yini domain at 12 and 13 Gyr.
| 13 Gyr | 12 Gyr | |||||||||
|
|
||||||||||
| Y ini | N (%) | M (%) | MWD domain | M WD,mean | N (%) | M (%) | MWD domain | M WD,mean | ||
|
|
||||||||||
| All WDs | ||||||||||
|
|
||||||||||
| 0.248 | – | – | 0.58–0.70 | 0.66 | – | – | 0.61–0.70 | 0.67 | ||
| [0.248; 0.27] | 19.0 | 20.5 | 0.56–0.71 | 0.66 | 17.9 | 19.4 | 0.58–0.71 | 0.67 | ||
| [0.27; 0.4] | 35.1 | 36.5 | 0.45–0.73 | 0.63 | 34.4 | 36.0 | 0.47–0.73 | 0.64 | ||
| ≥ 0.4 | 38.5 | 38.8 | 0.35–0.92 | 0.61 | 40.7 | 40.6 | 0.35–0.92 | 0.61 | ||
| He-WD | 7.4 | 4.3 | 0.26–0.47 | 0.35 | 7.0 | 4.0 | 0.26–0.47 | 0.35 | ||
|
|
||||||||||
| 2 Gyr – WDs on the WD cooling curve’s upper part | ||||||||||
|
|
||||||||||
| 0.248 | – | – | 0.58–0.63 | 0.61 | – | – | 0.61–0.66 | 0.63 | ||
| [0.248; 0.27] | 37.8 | 42.0 | 0.57–0.63 | 0.60 | 38.0 | 42.6 | 0.59–0.65 | 0.62 | ||
| [0.27; 0.4] | 46.0 | 45.4 | 0.47–0.61 | 0.53 | 45.0 | 44.6 | 0.47–0.63 | 0.55 | ||
| ≥ 0.4 | 3.9 | 3.4 | 0.46–0.48 | 0.47 | 7.1 | 6.1 | 0.46–0.49 | 0.47 | ||
| He-WD | 12.3 | 9.1 | 0.26–0.47 | 0.40 | 10.0 | 6.7 | 0.26–0.47 | 0.38 | ||
|
|
||||||||||
| 500 Myr– WDs on the WD cooling curve’s brighter part | ||||||||||
|
|
||||||||||
| 0.248 | – | – | 0.58–0.59 | 0.59 | – | – | 0.61–0.62 | 0.61 | ||
| [0.248; 0.27] | 38.7 | 42.3 | 0.57–0.59 | 0.58 | 39.8 | 44.0 | 0.59–0.62 | 0.60 | ||
| [0.27; 0.4] | 47.9 | 46.7 | 0.47–0.58 | 0.52 | 44.9 | 44.1 | 0.47–0.60 | 0.54 | ||
| ≥ 0.4 | 1.1 | 1.0 | 0.46–0.47 | 0.47 | 5.1 | 4.4 | 0.47–0.47 | 0.47 | ||
| He-WD | 12.3 | 10.0 | 0.28–0.46 | 0.43 | 10.1 | 7.5 | 0.27–0.47 | 0.41 | ||
Notes. The WDs are divided into three subgroups: WDs that joined the cooling sequence less than 500 Myr ago after the end of the core He burning (brighter part of the WD cooling curve), WDs that joined the cooling sequence for less than 2 Gyr (upper part of the WD cooling curve), and a group with all the WDs.
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