Table 2
Atmospheric parameters Teff , log g , and C and Si abundances.
| Object | Teff[K] | log g | [C/He] | [Si/He] | log N(HI) [cm-2] | Distance [pc] | |
|
|
|||||||
| WD J1929+4447 | 30 000 (1000) | 7.89 (0.15) | < −6.2 | < −7.5 | 20.4 (0.1) | 395 | |
| WD 1654+160 | 29 410 (500) | 7.97 (0.08) | < −6.4 | < −7.0 | 20.4 (0.1) | 170 | |
| EC 04207-4748 | 25 970 (500) | 7.79 (0.08) | −5.6 (0.2) | < −8.4 | 18.9 (0.1) | 108 | |
| EC 20058-5234 | 25 500 (500) | 8.01 (0.05) | −5.3 (0.2) | < −8.7 | 19.1 (0.1) | 104 | |
| PG 1115+158 | 25 000 (500) | 7.91 (0.07) | −5.6 (0.2) | −6.3 (0.2) | 19.8 (0.1) | 192 | |
|
|
|||||||
| WD 0100-068 | 19 800 | 8.07 | −7.3 | −7.5 | |||
| WD 0435+410 | 16 810 | 8.19 | < −9.0 | −7.2 | |||
| WD 0840+262 | 17 770 | 8.30 | < −8.3 | < −9.0 | |||
| WD 1557+192 | 19 570 | 8.15 | < −7.8 | < −8.1 | |||
| WD 1822+410 | 16 230 | 8.01 | −7.2 | −7.4 | |||
| WD 1940+374 | 16 630 | 8.07 | < −8.5 | < −9.0 | |||
| WD 2144-079 | 16 340 | 8.18 | < −8.5 | −7.8 | |||
Notes. PG 1115+158 has additional photospheric S (−6.7 ± 0.3) and Al (−7.0 ± 0.3). All hot objects show interstellar lines from H, C, N, Si, S; some also O and/or Al. For the hot variables we also give the interstellar hydrogen column density from Lα, which was used in deriving our parameters. Numbers in brackets are estimated errors. The distance is determined from the spectroscopic radius and the solid angle. The parameters for the cool objects are from Bergeron et al. (2011), where the errors and more details can be found.
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