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Table 7
Main results for the WDs in our sample.
| WD | Teff | log g | MWD | tcool | Mprog | tprog | Age | tcool/Age | Comp |
| (K) | (M⊙) | (Gyr) | (M⊙) | (Gyr) | (Gyr) | (%) | V − J | ||
|
|
|||||||||
| NLTT1762 | 10360 ± 200 | 8.19 ± 0.15 | 0.72 ± 0.07 | 0.68 ± 0.10 | 2.96 ± 0.52 |
0.49
|
1.2
|
58 | 1.46 |
| NLTT13110 | 6630 ± 220 | 7.99 ± 0.19 | 0.59 ± 0.08 | 1.61 ± 0.35 | 1.64 ± 0.87 |
2.3
|
3.9
|
42 | 3.21 |
| NLTT19311 | 7600 ± 100 | 7.88 ± 0.16 | 0.52 ± 0.07 | 0.94 ± 0.13 | 0.96 ± 0.73 | 12 |
13 |
7 | 3.32 |
| NLTT21891 | 13520 ± 580 | 7.92 ± 0.07 | 0.57 ± 0.03 | 0.23 ± 0.03 | 1.45 ± 0.32 | 3.4 |
3.6 |
6 | 4.22 |
| NLTT26379 | 15150 ± 590 | 7.91 ± 0.08 | 0.56 ± 0.03 | 0.16 ± 0.02 | 1.41 ± 0.36 | 3.8 |
3.9 |
4 | 3.75 |
| NLTT28470 | 15290 ± 570 | 7.99 ± 0.08 | 0.61 ± 0.03 | 0.18 ± 0.02 | 1.86 ± 0.38 | 1.49 |
1.67 |
11 | 4.13 |
| NLTT28712 | 9910 ± 250 | 8.04 ± 0.16 | 0.63 ± 0.07 | 0.62 ± 0.09 | 2.05 ± 0.74 |
1.15
|
1.77
|
35 | 4.19 |
| NLTT28772 | 9720 ± 190 | 8.09 ± 0.11 | 0.65 ± 0.05 | 0.69 ± 0.08 | 2.32 ± 0.55 |
0.89
|
1.58
|
44 | 4.18 |
| NLTT31644 | 19180 ± 500 | 7.89 ± 0.15 | 0.57 ± 0.06 | 0.07 ± 0.01 | 1.44 ± 0.61 | 3.5 |
3.5 |
2 | 5.06 |
| NLTT31890 | 10790 ± 290 | 8.17 ± 0.07 | 0.71 ± 0.03 | 0.60 ± 0.06 | 2.88 ± 0.29 |
0.53
|
1.13
|
53 | 2.95 |
| NLTT39605 | 9280 ± 230 | 8.12 ± 0.11 | 0.67 ± 0.05 | 0.82 ± 0.10 | 2.52 ± 0.55 |
0.76
|
1.58
|
52 | 3.85 |
| NLTT56546 | 13660 ± 540 | 7.97 ± 0.10 | 0.59 ± 0.04 | 0.24 ± 0.03 | 1.72 ± 0.45 | 1.93 |
2.17 |
11 | 3.99 |
| NLTT58107 | 11130 ± 380 | 8.05 ± 0.09 | 0.64 ± 0.04 | 0.47 ± 0.05 | 2.15 ± 0.45 |
1.04
|
1.51
|
31 | 5.80: |
| G86-B1B | 9110 ± 220 | 8.12 ± 0.11 | 0.67 ± 0.05 | 0.86 ± 0.10 | 2.51 ± 0.56 |
0.77
|
1.64
|
53 | 3.67 |
| LP347-4 | 12760 ± 230 | 7.91 ± 0.05 | 0.56 ± 0.02 | 0.27 ± 0.03 | 1.36 ± 0.26 | 4.3 |
4.5 |
6 | 3.82 |
| LP856-53 | 10200 ± 260 | 8.26 ± 0.15 | 0.76 ± 0.07 | 0.80 ± 0.14 | 3.26 ± 0.53 |
0.37
|
1.17
|
68 | 2.97 |
| LP888-64 | 9530 ± 310 | 7.92 ± 0.12 | 0.56 ± 0.05 | 0.58 ± 0.07 | 1.34 ± 0.52 | 4.5 |
5.1 |
11 | 4.23 |
| WOLF672A | 13330 ± 570 | 7.85 ± 0.10 | 0.53 ± 0.04 | 0.22 ± 0.03 | 1.00 ± 0.44 | 10 |
11 |
2 | 4.19 |
|
|
|||||||||
| NLTT10976 | 7050 ± 200 | 7.68 ± 0.25 | 0.40 ± 0.15 | 0.99 ± 0.12 | – | – | – | – | 3.52 |
| NLTT29967 | 6180 ± 220 | 7.26 ± 0.45 | 0.14 ± 0.19 | 0.55 ± 0.23 | – | – | – | – | 1.89 |
| NLTT44348 | 6510 ± 190 | 7.42 ± 0.33 | 0.23 ± 0.14 | 0.63 ± 0.20 | – | – | – | – | 2.34 |
|
|
|||||||||
| NLTT4615 | 5950 ± 190 | 8.01 ± 0.20 | 0.59 ± 0.09 | 2.40 ± 0.68 | 1.73 ± 0.94 |
1.9
|
4.3
|
56 | 3.13 |
| NLTT7890 | 5600 ± 160 | 8.01 ± 0.20 | 0.59 ± 0.09 | 2.99 ± 0.78 | 1.71 ± 0.94 |
2.0
|
5.0
|
60 | 1.90 |
| G107-70 | 5210 ± 60 | 8.01 ± 0.20 | 0.59 ± 0.09 | 3.90 ± 1.00 | 1.69 ± 0.94 |
2.0
|
5.9
|
66 | 4.38 |
| NLTT1374 | 9290 ± 330 | 8.01 ± 0.20 | 0.60 ± 0.09 | 0.70 ± 0.12 | 1.83 ± 0.92 |
1.6
|
2.3
|
31 | 2.19 |
| NLTT7051 | 7630 ± 220 | 8.01 ± 0.20 | 0.60 ± 0.09 | 1.16 ± 0.22 | 1.78 ± 0.93 |
1.7
|
2.8
|
41 | 2.97 |
| NLT13599 | 5400 ± 80 | 8.01 ± 0.20 | 0.59 ± 0.09 | 3.41 ± 0.87 | 1.70 ± 0.95 |
2.0
|
5.4
|
63 | 2.47 |
| NLTT15796 | 5025 ± 60 | 8.01 ± 0.20 | 0.59 ± 0.09 | 4.60 ± 0.88 | 1.68 ± 0.95 |
2.1
|
6.7
|
69 | 4.31 |
| NLT55288 | 6510 ± 170 | 8.01 ± 0.20 | 0.60 ± 0.09 | 1.77 ± 0.43 | 1.75 ± 0.94 |
1.8
|
3.6
|
49 | 1.21 |
| L577-71 | 8150 ± 110 | 8.01 ± 0.20 | 0.60 ± 0.09 | 0.98 ± 0.17 | 1.79 ± 0.92 |
1.6
|
2.6
|
37 | 4.08 |
Notes. The WDs with tcool/Age ratio greater than 30% are highlighted in boldface.
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