GJ 1004

All names: USNO-B1.0 1404-00005972, WD 0009+50, 00122+5025, GJ 1004, G217-37, WDJ001214.75+502520.74, J0012+5025, LSPM J0012+5025, LHS 1038, USNO 487, WD 0009+501, EGGR 381, WISEA J001214.23+502514.7, Gaia DR3 395234439752169344, G 217-37, Gaia DR2 395234439752169344, PSO J003.0591+50.4206, 2MASS J00121479+5025213, PM J00122+5025, TIC 201892746, PLX 27.01, NLTT 574, CNS5 56, Gaia EDR3 395234439752169344

Parameter Unit Gaia EDR3 Pan-STARRS DR1 O'Brien et al. 2024 Hardy et al. 2023a Caron et al. 2023 McCleery et al. 2020 Blouin et al. 2019 MWDD H Gaia DR2 Stilism Holberg et al. 2016 Ferrario et al. 2015 Limoges et al. 2015 Sion et al. 2014 Giammichele et al. 2012 Gianninas et al. 2011 Holberg et al. 2008 Zuckerman et al. 2003 Bergeron et al. 2001 Bergeron et al. 1997 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 00 12 13.97 (0.01) 00 12 14.00 (0.02) 00 12 14.00 (0.02) 00 12 14.64 00 12 13.97 00 12 14.74 (0.01) 00 12 14.00 00 12 16.61
Declination 50 25 11.91 (0.01) 50 25 12.19 (0.01) 50 25 12.19 (0.01) 50 25 19.20 50 25 11.91 50 25 20.74 (0.01) 50 25 12.19 50 25 40.80
Spectral type DA DA DAH DAH DAH DAH DAH DA DAP DAH7.6 DAP DA DAH DA DA DA DA7.6 DA8
Effective temperature [K] 6483.0 (34) 6353.9 (27) 6470.0 (17) 6476.2 (10) 6445.0 (40) 6444.0 6503.0 (143) 6540.0 (150) 6420.0 (99) 6502.0 6502.0 (143) 6620.0 (103) 6552.0 6540.0 (150) 6550.0 (150) 6610.0 (12)
log(g) [cgs] 8.24 (0.01) 8.23 (0.03) 8.25 (0.004) 8.24 (0.004) 8.25 (0.01) 8.24 8.21 (0.05) 8.15 (0.1) 8.23 (0.05) 8.40 (0.09) 8.21 8.23 (0.06) 8.23 (0.06) 8.28 (0.003)
Mass [M☉] 0.74 (0.009) 0.7350474624191744 (0.04) 0.748 (0.004) 0.746 (0.008) 0.741 0.72 (0.03) 0.74 (0.04) 0.68 (0.06) 0.73 (0.04) 0.85 (0.06) 0.74 (0.04) 0.74 (0.04) 0.766 (0.003)
log(Luminosity) [L☉] -3.69 -3.72 -3.71 (0.03) -3.71 (0.03)
Cooling age [Gyr] 3.3500 3.2370 (0.1) 3.1800 2.8900 3.0200 2.9700 (0.4) 3.1000 (0.4)
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H) <-11.147
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] 91.96 (0.02) 91.96 (0.02) 91.98 (0.03) 91.98 (0.03) 91.98 (0.03) 91.98 (0.03) 90.60 (4) 90.60 (4) 90.60 (4) 90.60 (4) 90.60 (4) 90.60 (4) 91.96 91.96 (0.02) 91.98 (0.03) 90.70 (4)
Distance [pc] 10.87 (0.002) 10.87 (0.002) 10.87 (0.004) 10.87 (0.003) 10.87 (0.003) 10.87 (0.003) 11.04 (0.5) 11.00 (0.4) 11.03 11.00 (0.5) 10.00 11.04 11.04 (0.5) 11.04 (0.5) 10.87 10.87 (0.002) 10.87 (0.003) 11.03 (0.4)
Composition H H H H H H H H H H H
Proper motion (right ascension) [mas/yr] -461.3320568 (0.02) -461.3662209 (0.04) -461.332 (0.01) -461.3662209
Proper motion (declination) [mas/yr] -551.6672959 (0.01) -551.6284295 (0.02) -551.667 (0.01) -551.6284295
Variability VAR NOV
Magnetic yes yes yes yes yes
Bd [MG] 0.2 0.316 *
Infrared excess (disk)
Binarity
B magnitude 14.81 14.81 14.81 14.60
V magnitude 14.36 14.36 14.36 14.36
R magnitude 14.08 14.08 14.08 14.20
I magnitude 13.77 13.77 13.77
J magnitude 13.45 (0.002) 13.49 (0.02) 13.41 13.48 13.41 13.41 13.49 (0.02)
H magnitude 13.25 (0.03) 13.25 (0.03) 13.26 13.30 13.26 13.26 13.25 (0.03)
K magnitude 13.19 (0.03) 13.19 (0.03) 13.21 13.21 13.21 13.21 13.19 (0.03)
u magnitude
g magnitude 14.52 (0.004)
r magnitude 14.27 (0.006)
i magnitude 14.20 (0.003)
z magnitude 14.21 (0.002)
G magnitude 14.24 (0.0009) 14.25 14.25 14.24 14.24 (0.003) 14.25
BP magnitude 14.47 (0.0009) 14.47 14.47
RP magnitude 13.84 (0.0008) 13.85 13.85
Pan g magnitude 14.52 (0.003) 14.52 (0.004) 14.52 (0.004)
Pan r magnitude 14.27 (0.006) 14.27 (0.006) 14.27 (0.006)
Pan i magnitude 14.20 (0.003) 14.20 (0.003) 14.20 (0.003)
Pan z magnitude 14.21 (0.003) 14.21 (0.002) 14.21 (0.002)
Pan y magnitude 14.22 (0.002) 14.22 (0.002) 14.22 (0.002)
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.