LAWD 23

All names: GJ 246, ASCC 481665, WD 0644+376, GCRV 4413, LHS 1870, G 87-7, Ci 20 398, He 3, 2MASS J06473802+3730587, WD 0644+37, HIP 32560, GEN# +9.80087007, HIC 32560, WD 0644+375, UCAC4 638-037761, UBV 6712, LTT 11917, uvby98 980087007, UCAC2 44989285, 06476+3730, LP 254-26, CSI+37-06442, L 1534-1, PLX 1579, WEB 6569, J0647+3730, TIC 16430678, CNS5 1688, EGGR 50, PLX 1579.00, TYC 2941-1747-1, ** JNN 6A, G 107-21, WISEA J064737.78+373047.2, LFT 487, USNO 24, USNO-B1.0 1275-00173025, [E38] 76, NLTT 16983, LAWD 23, WDS J06476+3731A, G87-7, SDSS J064737.85+373050.6, G 103-61, Gaia EDR3 943770757800160384, LAMOST J064737.83+373049.7, EG 50, LHS 1870, PM J06476+3730, Gaia DR3 943770757800160384, Gaia DR2 943770757800160384, SDSS J064737.86+373050.6, WDJ064737.99+373057.06, WISE J064737.79+373047.5, LSPM J0647+3730

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Kilic et al. 2025 O'Brien et al. 2024 McCleery et al. 2020 Kilic et al. 2020 Gaia DR2 Bedard et al. 2017 Tremblay et al. 2017 Stilism Holberg et al. 2016 Limoges et al. 2015 Sion et al. 2014 Giammichele et al. 2012 Gianninas et al. 2011 Holberg et al. 2008 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 06 47 37.68 (0.04) 06 47 37.69 (0.1) 06 47 37.69 (0.1) 06 47 37.92 06 47 37.68 06 47 37.99 (0.04) 06 47 37.69 06 47 39.07
Declination 37 30 42.06 (0.04) 37 30 42.53 (0.1) 37 30 42.53 (0.1) 37 30 54.00 37 30 42.06 37 30 57.07 (0.04) 37 30 42.53 37 31 34.32
Spectral type DA DA DA DA DA DA DA DA DA2.4 DA DA DA DA DA2.3 DA2
Effective temperature [K] 19491.0 (84) 21394.0 (432) 21174.9 (497) 21161.0 (36) 21996.0 (254) 22290.0 (340) 22288.0 (341) 22140.0 (337) 22288.0 22288.0 (341) 22290.0 (341) 22492.0 (230)
log(g) [cgs] 8.07 (0.006) 8.14 (0.02) 8.14 (0.03) 8.19 (0.003) 8.15 (0.04) 8.10 (0.05) 8.10 (0.05) 8.09 (0.05) 8.10 (0.05) 8.10 (0.05) 8.20 (0.008)
Mass [M] 0.662 (0.005) 0.712 (0.01) 0.736 (0.002) 0.69 (0.03) 0.68 (0.03) 0.69 (0.03) 0.69 (0.03) 0.75 (0.007)
log(Luminosity) [L] -1.49 -1.48
Cooling age [Gyr] 0.0700 0.0500
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
log(C/H)
log(N/H)
log(O/H)
log(Na/H)
log(Mg/H)
log(Al/H)
log(Si/H)
log(P/H)
log(S/H)
log(Sc/H)
log(Ti/H)
log(Cr/H)
log(Mn/H)
log(Fe/H)
log(Ni/H)
Parallax [mas] 58.53 (0.04) 58.53 (0.04) 58.57 (0.09) 58.57 (0.09) 63.53 (4) 65.51 (2) 66.30 (2) 64.91 (3) 64.91 (3) 58.53 58.53 (0.04) 58.57 (0.09) 62.60 (3)
Distance [pc] 17.08 (0.01) 17.09 (0.01) 17.07 (0.03) 17.07 (0.03) 15.70 (0.9) 15.74 (0.9) 15.26 (0.4) 15.10 (0.5) 15.40 15.40 (0.7) 19.00 15.41 17.08 17.08 (0.01) 17.07 (0.03) 15.97 (0.8)
Composition H H H H H H H
Proper motion (right ascension) [mas/yr] -229.6960021 (0.05) -229.7279829 (0.4) -229.696 (0.05) -229.7279829
Proper motion (declination) [mas/yr] -938.032836 (0.04) -937.7632904 (0.4) -938.033 (0.04) -937.7632904
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 11.97 (0.02)
V magnitude 12.06 (0.01) 12.08 12.08 12.07 (0.02)
R magnitude 12.26 (0.03)
I magnitude
J magnitude
H magnitude 12.66 (0.06)
K magnitude
u magnitude 12.07 (0.001) 12.07 (0.001)
g magnitude 11.93 (0.001) 11.93 (0.001)
r magnitude 12.33 (0.001) 12.33 (0.001)
i magnitude 12.64 (0.002) 12.64 (0.002)
z magnitude 13.99 (0.01) 13.99 (0.01)
G magnitude 12.06 (0.001) 12.07 12.07 12.06 12.06 (0.003) 12.07
BP magnitude 11.96 (0.001) 11.92 11.92
RP magnitude 12.26 (0.0004) 12.25 12.25
Pan g magnitude 12.07 (0.02)
Pan r magnitude 12.05 (0.06)
Pan i magnitude 12.43 (0.04)
Pan z magnitude 12.89 (0.01)
Pan y magnitude 13.02 (0.004)
E(B-V) 0.000

* Constant surface field

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The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.