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Table 1

Known WDs in binary systems in the solar neighbourhood.

WD name Distance [pc] Spectral Mass [M] log L/L Companion Spectral Angular References
type name type separation [′′]

Resolved WDMS
0148+641 17.35 (0.15) DA5.6 0.66 (0.03) –3.08 GJ 3117 A M2 12.1 1, 2, 3, 4, 5
0208510 10.782 (0.004) DA6.9 0.59 (0.01) GJ86A K0 1.9 3, 6, 7
0415594 18.46 (0.05) DA3.3 0.60 (0.02) eps. Reticulum A K2 12.8 7, 9,10
0426+588 5.51 (0.02) DC7.1 0.69 (0.02) –3.52 GJ 169.1 A M4.0 9.2 4, 5, 8, 11, 12, 13, 14
0628020 20.49 (0.46) DA7.2 0.62 (0.01) LDS 5677B M 4.5 15, 16, 17
0642166 2.631 (0.009) DA2.0 0.98 (0.03) –1.53 Sirius A A0 7.5 8, 10, 18
0736+053 3.50 (0.01) DQZ6.5 0.63 (0.00) –3.31 Procyon A F5 53 10, 19
0738172 9.096 (0.046) DZA6.6 0.62 (0.02) –3.35 GJ 238 B M6.5 21.4 3, 8, 20, 21
0751252 17.78 (0.13) DA9.9 0.59 (0.02) –4.02 LTT2976 M0 400 3, 4, 5, 22, 23
1009184 18.3 (0.3) DZ8.3 0.59 (0.02) –3.74 LHS 2031 A K7 400 3, 10, 24, 25, 26
1043188 19.01 (0.18) DQpec8.7 0.53 (0.11) –3.77 GJ 401 A M3 8 3, 4, 5, 15
1105048 17.33 (3.75) DA3.5 0.54 (0.01) LP 672–2 M3 279 2, 17, 27, 28
1132325 9.560 (0.034) DC10 HD 100623 K0 16 8, 10, 17, 29
1327083 16.2 (0.7) DA3.5 0.61 (0.03) –2.16 LHS 353 M4.5 503 3, 28, 30, 31
1345+238 12.1 (0.3) DC11.0 0.45 (0.02) –4.08 LHS 362 M5 199 3, 31, 32
1544377 15.25 (0.12) DA4.8 0.55 (0.03) –2.67 GJ 599 A G6 15.2 3, 4, 5, 8, 10, 33
1620391 12.792 (0.062) DA2.1 0.61 (0.02) –1.12 HD 147513 G5 345 8, 10, 27, 31, 34
1917077 10.1 (0.3) DBQA4.8 0.62 (0.02) –2.81 LDS 678B M6 27.3 3, 20, 31
2011+065 22.4 (1.0) DC7.6 0.7 (0.04) –3.68 LHS 3533 M3.5 101 13, 26, 35
2151015 24.5 (1.0) DA5.5 0.58 (0.03) –2.96 LTT 8747B M8 1.082 3, 31, 36
2154512 15.12 (0.12) DQP8.3 0.60 (0.04) –3.44 GJ841 A M2 28.5 3, 4, 5, 30, 37, 38
2307+548 16.2 (0.7) DA8.8 0.58 (–) G233–42 M5 6 13, 17, 39, 40
2307691 20.94 (0.38) DA5 0.57 (–) GJ 1280 K3 13.1 17
2341+322 17.61 (0.55) DA4.0 0.56 (0.03) –2.3 G130–6 M3 175 20, 41, 42

Unresolved WDMS
0419487 20.13 (0.55) DA7.8 0.22 (0.05) –3.14 M4 P = 0.3037 3, 16, 43, 44, 45
0454+620 21.6 (1.2) DA4.6 1.14 (0.07) 13, 39

Resolved DWD
0648+641 33.3 (5.9) DA8.3 0.98 (0.09) –4.09 WD0649+639 DA8.1 490 13, 28, 46, this work
0747+073A 18.3 (0.2) DC10.4 0.48 (0.01) –4.20 WD0747+073B DC12 16.4 27, 47
2126+734 21.2 (0.8) DA3.2 0.60 (0.03) –1.97 DC10 1.4 13, 31, 48
2226754 13.5 (0.9) DC12.0 0.58 (0.00) –4.32 WD2226755 DC12.0 93 3, 49

Unresolved DWD
0135052 12.3 (0.4) DA6.9 0.24 (0.01) –3.00 DA6.9 P = 1.56 27, 50
0532+414 22.4 (1.0) DA6.5 0.52 (0.03) –3.20 3, 49
Unresolved DWD candidate
0108+277 28.0 (1.5) DA7.8 0.59 (0.00) –3.60 3
0121429 18.3 (0.3) DAH8.0 0.41 (0.01) –3.46 3
0423+120 17.4 (0.8) DC8.2 0.65 (0.04) –3.75 3, 25
0503174 21.9 (1.9) DAH9.5 0.38 (0.07) –3.75 3
0839327 8.80 (0.15) DA5.6 0.44 (0.07) –2.84 3, 8
2048+263 20.1 (1.4) DA9.9 0.24 (0.04) –3.65 3
2248+293 20.9 (1.9) DA9.0 0.35 (0.07) –3.62 3
2322+137 22.3 (1.0) DA9.7 0.35 (0.03) –3.75 3

Notes. The distances, spectral types, masses, and luminosities are taken from Giammichele et al. (2012). References for the binarity of the system are given in the last column. For the unresolved systems, the period P is given in days instead of angular separation, if available. 1Greenstein (1970); 2Wegner (1981); 3Giammichele et al. (2012); 4Tremblay et al. (2017); 5Gaia Collaboration (2016); 6Mugrauer & Neuhäuser (2005); 7van Leeuwen (2007); 8http://www.DenseProject.com; 9Farihi et al. (2011a); 10Holberg et al. (2013); 11Liebert (1976); 12Heintz (1990); 13Limoges et al. (2015); 14Dieterich et al. (2012); 15Oswalt et al. (1988); 16Subasavage et al. (2009); 17Holberg et al. (2016); 18Gatewood & Gatewood (1978); 19Liebert et al. (2013); 20Luyten (1949); 21Davison et al. (2015); 22Subasavage et al. (2008); 23Luyten & Hughes (1980); 24Henry et al. (2002); 25Holberg et al. (2008b); 26Hawley et al. (1996); 27Sion et al. (2014); 28van Altena et al. (1995); 29Poveda et al. (1994); 30Eggen (1956); 31Farihi et al. (2005); 32Dahn & Harrington (1976); 33Wegner (1973); 34Alexander & Lourens (1969); 35Giclas et al. (1959); 36Farihi et al. (2006); 37Vornanen et al. (2010); 38Tamazian & Malkov (2014); 39Limoges et al. (2013); 40Newton et al. (2014); 41Sion & Oswalt (1988); 42Garcés et al. (2011); 43Bessell & Wickramasinghe (1979); 44Bruch & Diaz (1998); 45Maxted et al. (2007); 46Lépine & Shara (2005); 47Greenstein (1970); 48Zuckerman et al. (1997); 49Scholz et al. (2002); 50Saffer et al. (1998)51Zuckerman et al. (2003).

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