Table 1
Parameters for the white dwarf in EGB 6.
| Teff /K | 105 000 ± 5000 | ||
|---|---|---|---|
| log(g cm−1 s−2) | 7.4 ± 0.4 | ||
| E(B − V) | 0.025 ± 0.005 | ||
| log(nH cm2) | 20.3 ± 0.4 | ||
| M∕M⊙ |  |
||
| R∕R⊙ |  |
||
| L∕L⊙ |  |
||
| d/pc |  |
||
| log(tevol yr−1) |  |
||
| log(Ṁ∕M⊙ yr−1) |  |
||
| Abundances | Ni∕NH | Xi | [Xi] |
| H | 1 | 0.74 | 0.00 |
| He | 0.085 | 0.25 | 0.00 |
| C | 3.4 × 10−4 | 3.0 × 10−3 | 0.10 |
| N | 1.9 × 10−5 | 2.0 × 10−4 | − 0.54 |
| O | 4.3 × 10−4 | 5.0 × 10−3 | − 0.06 |
| F | 1.1 × 10−7 | 1.5 × 10−6 | 0.47 |
| Si | 3.9 × 10−5 | 8.0 × 10−4 | 0.08 |
| P | 2.2 × 10−7 | 5.0 × 10−6 | − 0.07 |
| S | 4.3 × 10−6 | 1.0 × 10−4 | − 0.49 |
| Ar | 2.5 × 10−6 | 7.3 × 10−5 | 0.00 |
| Fe | 8.5 × 10−5 | 3.5 × 10−3 | 0.46 |
| Ni | 2.3 × 10−6 | 1.0 × 10−4 | 0.17 |
Notes. Mass, radius, luminosity, post-AGB age tevol, and mass-loss rate Ṁ from evolutionary tracks by Miller Bertolami (2016). Abundances are given in number ratios relative to hydrogen(column 2), in mass fractions (column 3), and logarithmic mass fractions relative to solar value (column 4; solar abundances from Asplund et al. 2009). Error limits for the abundances are ± 0.5 dex for the metals and ± 0.4 dex for helium.
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