Table 1.
Names, spectral types, J2000 coordinates, observed Gaia eDR3 G band magnitudes, distances, Gaia extinction coefficients, dereddened Gaia color indexes, and the absolute dereddened G band magnitudes of all known UHE white dwarfs and white dwarfs showing only the He II line problem.
| Name | Spectral | RA | Dec | G | d | AG | (BP − RP)0 | MG0 |
|---|---|---|---|---|---|---|---|---|
| type | J2000 | J2000 | [mag] | [pc] | [mag] | [mag] | [mag] | |
| UHE white dwarfs | ||||||||
| SDSS J003213.14+160434.8(a) | DOZ*V UHE | 8.05472 | 16.07633 | 15.75 |
 |
0.13 | −0.63 | 7.55 |
| WD 0101−182(b) | DOZ*V UHE | 16.06273 | −18.02916 | 15.74 |
 |
0.04 | −0.61 | 7.71 |
| SDSS J014636.73+323614.3(c) | DO*V UHE | 26.65308 | 32.60403 | 15.54 |
 |
0.13 | −0.67 | 7.82 |
| HS 0158+2335(d),(e) | DO*V UHE | 30.36338 | 23.83134 | 16.97 |
 |
0.22 | −0.54 | 8.39 |
| SDSS J025403.75+005854.5(f) | DO*V UHE | 43.51563 | 0.98173 | 17.41 |
 |
0.18 | −0.59 | 7.87 |
| HE 0504−2408(g),(h) | DO UHE | 76.57540 | −24.06685 | 15.69 |
 |
0.03 | −0.61 | 7.31 |
| HS 0713+3958(e),(g),(h) | DO*V UHE | 109.26134 | 39.88989 | 16.56 |
 |
0.12 | −0.56 | 7.40 |
| HS 0727+6003(d),(h) | DO*V UHE | 112.83912 | 59.96028 | 16.09 |
 |
0.13 | −0.62 | 7.83 |
| HS 0742+6520(e) | DO UHE | 116.85481 | 65.21699 | 15.73 |
 |
0.07 | −0.63 | 8.07 |
| SDSS J090023.89+234353.2(a) | DA UHE | 135.09954 | 23.73146 | 18.74 |
 |
0.06 | −0.62 | 7.29 |
| SDSS J105956.00+404332.4(i) | DOZ*V UHE | 164.98336 | 40.72568 | 18.31 |
 |
0.03 | −0.67 | 6.63 |
| SDSS J121523.08+120300.7(f) | DOZ*V UHE | 183.84619 | 12.05022 | 18.14 |
 |
0.06 | −0.71 | 7.51 |
| SDSS J125724.04+422054.2(a) | DA*V UHE | 194.35026 | 42.34845 | 17.44 |
 |
0.04 | −0.42 | 7.75 |
| SDSS J151026.48+610656.9(f) | DO*V UHE | 227.61031 | 61.11581 | 17.26 |
 |
0.02 | −0.59 | 7.84 |
| HS 2027+0651(d) | DO*V UHE | 307.38544 | 7.01881 | 16.62 |
 |
0.18 | −0.52 | 7.87 |
| HS 2115+1148(d),(i),(h) | DAO*V UHE | 319.57804 | 12.02558 | 16.44 |
 |
0.13 | −0.60 | 7.74 |
| White dwarfs showing only the He II line problem | ||||||||
| SDSS J082134.59+173919.4(i) | DOZ*V UHE: | 125.39562 | 17.65539 | 19.01 |
 |
0.08 | −0.47 | 8.72 |
| SDSS J082724.44+585851.7(i) | DO UHE: | 126.85192 | 58.98104 | 17.47 |
 |
0.32 | −0.37 | 8.36 |
| SDSS J094722.49+101523.6(i) | DOZ UHE: | 146.84374 | 10.25657 | 18.00 |
 |
0.05 | −0.59 | 8.29 |
| SDSS J102907.31+254008.3(a) | DO*V UHE: | 157.28044 | 25.66901 | 17.05 |
 |
0.04 | −0.59 | 8.24 |
| HE 1314+0018(j) | DOZ*V | 199.35303 | 0.04380 | 16.01 |
 |
0.06 | −0.60 | 8.42 |
| SDSS J151215.72+065156.3(i) | DOZ*V | 228.06540 | 6.86566 | 17.22 |
 |
0.07 | −0.55 | 7.21 |
| HS 1517+7403(k) | DOZ*V | 229.19388 | 73.86848 | 16.63 |
 |
0.06 | −0.61 | 7.19 |
| SDSS J155356.81+483228.6(f) | DO*V | 238.48667 | 48.54126 | 18.61 |
 |
0.04 | −0.55 | 8.43 |
References. (a)Kepler et al. (2019); (b)this work; (c)Reindl et al. (2019); (d)Dreizler et al. (1995); (e)Reindl et al. (2014); (f)Hügelmeyer et al. (2006); (g)Werner et al. (1995); (h)Werner et al. (2018b); (i)Werner et al. (2014); (j)Werner et al. (2004); (k)Dreizler & Heber (1998).
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