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Table 1
Stellar parameter.
| Name | Spectral | Teff | log g | XHe | M | log (L/L⊙) | d | z | |
| type | [K] | [M⊙] | [kpc] | [kpc] | |||||
|
|
|||||||||
| J0935 | O(H) | 92 649 ± 11 358 | 5.50 ± 0.12 | −0.46 ± 0.09 |
|
|
|
|
|
| J1000 | O(H) | 108 194 ± 8356 | 5.92 ± 0.09 | −0.49 ± 0.06 |
|
|
|
|
|
| J2046 | O(H) | 93 936 ± 21 166 | 5.51 ± 0.32 | −0.54 ± 0.16 |
|
|
|
|
|
| J1556 | PG 1159 |
|
5.30 ± 0.30 | −0.07 ± 0.03 |
|
|
|
|
|
| J0757a | O(He) | 80 000 ± 20 000 | 5.00 ± 0.30 | −0.01 ± 0.01 |
a
|
b
|
b
|
b
|
|
c
|
c
|
c
|
c
|
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Notes. He abundances are given in logarithmic mass fractions.
(a)
Atmospheric parameters taken from Werner et al. (2014).
(b)
Based on (V)LTP tracks of Miller Bertolami & Althaus (2007, 2006).
(c)
Based on double He-white dwarf merger tracks of Zhang & Jeffery (2012a,b).
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