GD 77

All names: Gaia EDR3 966561537900256512, USNO-B1.0 1377-00210694, WD 0637+47, Gaia DR3 966561537900256512, 06412+4744, Gaia DR2 966561537900256512, EGGR 212, GCRV 21691, PM J06412+4744, LP 161-12, 1SWASP J064112.82+474419.8, GD 77, TIC 274327995, 0637+477, GEN# +6.10060077, GALEX J064112.7+474418, WDJ064112.82+474419.65, WD 0637+477, WD 0637+478, 2MASS J06411281+4744195, LSPM J0641+4744

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Hardy et al. 2023a Leggett et al. 2018 MWDD H Gaia DR2 Stilism Ferrario et al. 2015 Limoges et al. 2015 Gianninas et al. 2011 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 06 41 12.80 (0.02) 06 41 12.80 (0.04) 06 41 12.80 06 41 12.82 (0.02) 06 41 12.80 06 41 12.24
Declination 47 44 16.92 (0.02) 47 44 17.01 (0.04) 47 44 16.92 47 44 19.65 (0.02) 47 44 17.01 47 44 26.88
Spectral type DA DAP3.7 DA DA DAP DA DA DAP3.4 DAP5
Effective temperature [K] 13706.9 (137) 13664.0 (890) 13317.0 14870.0 (120) 14060.0 (3216) 14650.0 (590) 13760.0 (101)
log(g) [cgs] 8.23 (0.01) 8.29 (0.04) 8.20 8.00 (0) 8.30 (0.06) 8.22 (0.006)
Mass [M] 0.7527227830001292 (0.02) 0.787 (0.03) 0.728 0.69 0.61 (0.1) 0.8 (0.04) 0.746 (0.005)
log(Luminosity) [L] -2.23
Cooling age [Gyr] 0.4030 (0.08) 0.3743
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] 24.87 (0.03) 26.07 (0.2) 24.86 (0.04) 24.87 24.87 (0.03) 24.86 (0.04)
Distance [pc] 40.21 (0.04) 38.36 (0.3) 40.23 (0.07) 48.10 (10) 40.00 40.21 40.21 (0.04) 40.23 (0.07)
Composition H H H
Proper motion (right ascension) [mas/yr] -16.53370898 (0.02) -16.61885559 (0.07) -16.534 (0.03) -16.61885559
Proper motion (declination) [mas/yr] -170.5777797 (0.02) -170.6431404 (0.06) -170.578 (0.02) -170.6431404
Variability NOV
Magnetic yes yes
Bd [MG] 1.2 (0.2)
Infrared excess (disk)
Binarity
B magnitude 14.93
V magnitude
R magnitude 14.90
I magnitude
J magnitude 15.05 (0.05)
H magnitude 15.14 (0.08)
K magnitude 15.23 (0.2)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 14.82 (0.002) 14.84 14.82 14.82 (0.003) 14.84
BP magnitude 14.81 (0.002) 14.80 14.80
RP magnitude 14.89 (0.002) 14.90 14.90
Pan g magnitude 14.73 (0.002)
Pan r magnitude 14.96 (0.002)
Pan i magnitude 15.20 (0.002)
Pan z magnitude 15.43 (0.002)
Pan y magnitude 15.57 (0.006)
E(B-V) 0.001

* 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.