PB 475

All names: SDSS J103959.55+400225.0, WD 1037+403, Gaia DR2 779443006951919872, Gaia EDR3 779443006951919872, PB 475, LAMOST J103959.54+400225.0, SDSS J103959.55+400225.1, SDSS J103959.55+400225.10, Gaia DR3 779443006951919872, SDSS J103959.54+400225.0

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Guo et al. 2015 Koester & Kepler 2015 Vincent et al. 2024 Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 10 39 59.51 (0.1) 10 39 59.55 10 39 59.51 (0.1) 10 39 59.51 10 39 59.56 (0.1) 10 39 59.55 10 39 59.38 10 39 59.55
Declination 40 02 24.62 (0.1) 40 02 25.02 40 02 24.63 (0.2) 40 02 24.62 40 02 25.12 (0.1) 40 02 25.05 40 02 20.76 40 02 25.05
Spectral type DB DB DB DB DB DB DB DB
Effective temperature [K] 19705.0 24119.0 17904.0 19565.0 (166) 19724.0 (1235) 18976.0 (157) 20904.0 (1084)
log(g) [cgs] 8.06 8.28 8.05 7.88 (0.04) 7.94 (0.08) 8.10 (0.04) 8.06 (0.05)
Mass [M] 0.634 0.774 0.624 0.564 (0.06) 0.63 (0.03)
log(Luminosity) [L]
Cooling age [Gyr] 0.1204
log(H/He) <-5.413 <-4.33
log(C/He)
log(Ca/He) <-5.16
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] 3.36 (0.2) 3.83 (0.2) 3.36 3.36 (0.2)
Distance [pc] 297.37 (17) 261.10 (13) 306.00 297.37 297.37 (17)
Composition He
Proper motion (right ascension) [mas/yr] -32.49734353 (0.2) -32.29788893 (0.3) -32.497 (0.2) -30.1
Proper motion (declination) [mas/yr] -31.56891293 (0.1) -31.92827153 (0.3) -31.569 (0.1) -31.0
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 17.00
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 17.70 (0.01) 17.70 (0.01) 17.72 (0.02) 17.72 17.75 (0.02)
g magnitude 17.82 (0.006) 17.82 (0.006) 17.81 (0.03) 17.81 17.82 (0.03)
r magnitude 18.19 (0.007) 18.19 (0.007) 18.19 (0.02) 18.18 18.19 (0.02)
i magnitude 18.45 (0.009) 18.45 (0.009) 18.47 (0.02) 18.46 18.48 (0.02)
z magnitude 18.83 (0.04) 18.83 (0.04) 18.72 (0.04) 18.71 18.72 (0.04)
G magnitude 18.00 (0.007) 18.03 18.00 18.00 (0.003)
BP magnitude 17.93 (0.007) 17.89
RP magnitude 18.11 (0.03) 18.13
Pan g magnitude 17.90 (0.005)
Pan r magnitude 18.19 (0.01)
Pan i magnitude 18.48 (0.005)
Pan z magnitude 18.72 (0.01)
Pan y magnitude 18.94 (0.03)
E(B-V) 0.016

* 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.