Table 1.
Programme stars and their main physical features.
| Star | G | d | Teff | log g | M | Age | Previous observations | |
|---|---|---|---|---|---|---|---|---|
| (pc) | (K) | c.g.s. | (M⊙) | (Gyr) | ||||
| WD 1309+853 | G 256–7 | 15.8 | 16.5 | 5300 | 8.12 | 0.66 | 5.46 | DA MWD with ⟨|B|⟩ ≃ 5.4 MG (7) |
| WD 1350−090 | GJ 3814 | 14.6 | 19.7 | 9580 | 8.13 | 0.68 | 0.81 | DA MWD with ⟨|B|⟩ ≃ 0.45 MG (5,15) |
| WD 1503−070 | GD 175 | 15.8 | 20.3 | 6640 | 8.00 | 0.59 | 1.80 | DA MWD with ⟨Bz⟩∼2 MG (12) |
| WD 1556+044 | PM J15589+0417 | 16.0 | 22.5 | 6685 | 8.43 | 0.85 | 3.65 | DC (He) never observed |
| WD 1647+591 | DN Dra | 12.3 | 10.9 | 12 738 | 8.24 | 0.76 | 0.45 | Non magnetic DA WD (13) |
| WD 1748+708 | G 240–72 | 13.8 | 6.2 | 5570 | 8.34 | 0.79 | 5.86 | Known strongly polarised DQ WD (2,4,9) |
| WD 1831+197 | G 184–12 | 16.3 | 39.3 | 7305 | 8.04 | 0.60 | 1.57 | DQ (He) no polarisation detected (8) |
| WD 1856+534 | LP 141–14 | 17.0 | 24.8 | 4430 | 7.69 | 0.40 | 4.34 | DC (He) never observed |
| WD 1900+705 | Grw +70° 8247 | 13.3 | 12.9 | 11 880 | 8.54 | 0.93 | 0.92 | Known strongly polarised DA WD (1) |
| WD 1953−011 | LAWD 79 | 13.6 | 11.6 | 7868 | 8.23 | 0.73 | 1.63 | DA6 MWD (⟨Bz⟩∼0.1 MG with spot) (6,10) |
| WD 2011+063 | G 24–9 | 15.7 | 22.9 | 6455 | 8.10 | 0.63 | 2.34 | DC (He) no polarisation detected (3,8) |
| WD 2032+248 | HD 340611 | 11.6 | 14.8 | 20 704 | 8.03 | 0.64 | 0.06 | Non magnetic DA WD (13) |
| WD 2049−253 | UCAC4 325–215293 | 16.0 | 18.0 | 4895 | 7.84 | 0.48 | 4.4 | DC MWD (14) |
| WD 2049−222 | LP 872–48 | 15.0 | 20.3 | 8164 | 8.33 | 0.79 | 1.97 | DC (He) never observed |
| WD 2117+539 | EGGR 378 | 12.4 | 17.3 | 15 250 | 7.94 | 0.58 | 0.17 | Non magnetic DA WD (13) |
| WD 2254+076 | G 28–27 | 17.1 | 45.5 | 12 847 | 9.26 | 1.29 | ∼1.8 | DA MWD with ⟨|B|⟩ ≃ 16 MG (11) |
References. Key to references: 1: Kemp et al. (1970); 2: Angel et al. (1974); 3: Angel et al. (1981); 4: West (1989); 5: Schmidt & Smith (1994); 6: Schmidt & Smith (1995); 7: Putney (1995); 8: Putney (1997); 9: Berdyugin & Piirola (1999); 10: Valyavin et al. (2008); 11: Külebi et al. (2009); 12: Gianninas et al. (2011); 13: Bagnulo & Landstreet (2018); 14: Bagnulo & Landstreet (2020); 15: Bagnulo & Landstreet (2021).
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