WD 1405+008

All names: GALEX J140814.6+003839, WD 1405+008, 2QZ J140814.6+003838, SDSS J140814.64+003839.0, Gaia EDR3 3660245449766212736, SDSS J140814.63+003838.9, SDSS J140814.64+003838.9, SDSS J140814.63+003839.0, SDSS J140814.64+003838.90, Gaia DR3 3660245449766212736, Gaia DR2 3660245449766212736

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Nitta et al. 2009 Harris et al. 2003 Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 14 08 14.60 (0.3) 14 08 14.64 14 08 14.60 (0.4) 14 08 14.63 (0.3) 14 08 14.63 14 08 13.30 14 08 14.64
Declination 00 38 39.12 (0.2) 00 38 39.01 00 38 39.12 (0.4) 00 38 39.02 (0.2) 00 38 38.99 00 38 35.52 00 38 38.90
Spectral type DB2 DB2 DB2 DB DB2.0 DB DB+MS
Effective temperature [K] 26078.0 27797.0 20109.0 26073.0 (1227) 25314.0 (1271) 25953.0 (1082)
log(g) [cgs] 7.85 8.00 7.81 7.98 (0.1) 8.01 (0.1) 7.95 (0.1)
Mass [M] 0.531 0.611 0.498 0.579 (0.05)
log(Luminosity) [L]
Cooling age [Gyr] 0.0462
log(H/He) -3.769
log(C/He)
log(Ca/He)
log(Ca/H)
log(N/He)
log(O/He)
log(Na/He)
log(Mg/He)
log(Al/He)
log(Si/He)
log(P/He)
log(S/He)
log(Cl/He)
log(Sc/He)
log(Ti/He)
log(V/He)
log(Cr/He)
log(Mn/He)
log(Fe/He)
log(Co/He)
log(Ni/He)
log(Cu/He)
log(Zn/He)
log(Ga/He)
log(Ge/He)
log(Sr/He)
Parallax [mas] 1.56 (0.3) 1.61 (0.5) 1.56 (0.3)
Distance [pc] 641.10 (138) 621.64 (179) 641.11 (138)
Composition He
Proper motion (right ascension) [mas/yr] -32.82855807 (0.4) -33.10670286 (0.8) -32.829 (0.4) -21.2
Proper motion (declination) [mas/yr] 6.123897626 (0.3) 6.391204719 (0.7) 6.124 (0.3) 1.3
Variability VAR
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity WDMS
B magnitude 19.27
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.98 (0.02) 19.01 18.98 (0.02) 18.98 (0.02) 19.01 19.00 (0.02)
g magnitude 19.20 (0.01) 19.19 19.20 19.20 (0.01) 19.19 (0.02) 19.20 19.19 (0.02)
r magnitude 19.56 (0.01) 19.60 19.56 (0.01) 19.60 (0.02) 19.60 19.60 (0.02)
i magnitude 19.84 (0.03) 19.85 19.84 (0.03) 19.85 (0.03) 19.85 19.85 (0.03)
z magnitude 19.96 (0.09) 19.97 19.96 (0.09) 19.97 (0.09) 19.97 19.98 (0.09)
G magnitude 19.35 (0.04) 19.41 19.35 (0.005)
BP magnitude 19.27 (0.04) 19.19
RP magnitude 19.66 (0.07) 19.55
Pan g magnitude 19.20 (0.02)
Pan r magnitude 19.54 (0.01)
Pan i magnitude 19.83 (0.01)
Pan z magnitude 20.07 (0.03)
Pan y magnitude 20.31 (0.06)
E(B-V) 0.026

* 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.