WD J0018+0031

All names: SDSS J001836.11+003151.1, WD 0016+002, Gaia EDR3 2545567334691271424, SDSS J001836.15+003151.4, SDSS J001836.11+003151.2, Gaia DR2 2545567334691271424, Gaia DR3 2545567334691271424

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 MWDD H Gaia DR2 Stilism Tremblay et al. 2011 Castanheira & Kepler 2009 Mullally et al. 2005 Vincent et al. 2024 White Dwarf Research Corporation Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 00 18 36.29 (0.09) 00 18 36.16 00 18 36.29 (0.1) 00 18 36.29 00 18 36.15 00 18 35.81 00 18 36.11
Declination 00 31 52.35 (0.07) 00 31 51.47 00 31 52.32 (0.09) 00 31 52.35 00 31 51.43 00 31 51.60 00 31 51.15
Spectral type DA DA DA DAV DA_auto DAV4.3 DA DA
Effective temperature [K] 11122.0 11850.0 (120) 11530.0 11530.0 11805.0 (177) 11696.0 11696.0 (76) 11640.0 (86)
log(g) [cgs] 7.91 8.12 (0.04) 8.04 8.04 8.00 (0.02) 7.93 7.93 (0.04) 7.99 (0.05)
Mass [M☉] 0.552 0.68 (0.03) 0.602 (0.02) 0.599 (0.03)
log(Luminosity) [L☉]
Cooling age [Gyr] 0.4070 0.4677
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] 7.19 (0.1) 7.15 (0.1) 7.19
Distance [pc] 139.12 (2) 139.80 (3) 139.12
Composition H H
Proper motion (right ascension) [mas/yr] 154.6320648 (0.1) 154.4867858 (0.3) 150.3
Proper motion (declination) [mas/yr] 70.22061682 (0.08) 70.1716929 (0.2) 69.9
Variability VAR VAR VAR VAR
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude 17.40 17.40 17.36
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 17.85 (0.01) 17.82 (0.02) 17.81 17.82 (0.02)
g magnitude 17.33 (0.005) 17.37 (0.01) 17.36 17.38 (0.01)
r magnitude 17.53 (0.006) 17.54 (0.01) 17.53 (0.01)
i magnitude 17.73 (0.008) 17.73 (0.02) 17.72 (0.02)
z magnitude 17.92 (0.02) 17.95 (0.03) 17.94 (0.03)
G magnitude 17.44 (0.005) 17.46 17.44
BP magnitude 17.47 (0.005) 17.46
RP magnitude 17.45 (0.01) 17.44
Pan g magnitude 17.41 (0.005)
Pan r magnitude 17.55 (0.003)
Pan i magnitude 17.76 (0.006)
Pan z magnitude 17.95 (0.009)
Pan y magnitude 18.07 (0.04)
E(B-V) 0.006
Period #1 [s] 149.9 257.9
Amplitude #1 [mma] 3.7 5.8
Period #2 [s] 257.3
Amplitude #2 [mma] 6.0

* 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.