WD 0840+364

All names: SDSS J084350.85+361419.50, Gaia DR2 717661482949450112, CBS 82, WD 0840+364, GALEX J084350.9+361419, Gaia DR3 717661482949450112, Gaia EDR3 717661482949450112, SDSS J084350.85+361419.5, LAMOST J084350.85+361419.5, KUV 08407+3625, SDSS J084350.83+361419.3

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Bergeron et al. 2011 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 08 43 50.82 (0.07) 08 43 50.85 08 43 50.82 (0.09) 08 43 50.82 08 43 50.85 (0.07) 08 43 50.85 08 43 50.06 08 43 50.85
Declination 36 14 19.09 (0.05) 36 14 19.59 36 14 19.10 (0.06) 36 14 19.09 36 14 19.60 (0.05) 36 14 19.57 36 14 38.40 36 14 19.55
Spectral type DB DB DB DB DB DB DB DB
Effective temperature [K] 20297.0 20345.0 19561.0 20428.0 (176) 21260.0 (864) 18946.0 (581) 19858.0 (156) 22154.0 (575)
log(g) [cgs] 8.10 8.03 8.01 8.03 (0.03) 8.15 (0.07) 7.94 (0.03) 8.19 (0.03) 8.16 (0.03)
Mass [M] 0.655 0.615 0.604 0.69 (0.04) 0.563 (0.03) 0.692 (0.02)
log(Luminosity) [L] -1.61
Cooling age [Gyr] 0.0779 0.0794
log(H/He) <-5.269 <-4.26 <-5.05 (3)
log(C/He)
log(Ca/He) <-4.55
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] 4.94 (0.09) 5.03 (0.1) 4.94 4.94 (0.09)
Distance [pc] 202.40 (4) 199.00 (6) 197.00 176.00 202.40 202.40 (4)
Composition He He
Proper motion (right ascension) [mas/yr] -26.55389601 (0.08) -26.3222783 (0.2) -26.554 (0.08) -24.4
Proper motion (declination) [mas/yr] -31.74064935 (0.07) -31.63902851 (0.1) -31.741 (0.07) -33.0
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 17.00
V magnitude 17.03 17.00
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 16.87 (0.007) 16.87 (0.007) 16.89 (0.02) 16.89 16.90 (0.02)
g magnitude 17.01 (0.004) 17.01 (0.004) 17.03 (0.02) 17.03 17.03 (0.02)
r magnitude 17.39 (0.005) 17.39 (0.005) 17.39 (0.02) 17.38 (0.02)
i magnitude 17.66 (0.007) 17.66 (0.007) 17.68 (0.02) 17.67 (0.02)
z magnitude 17.91 (0.02) 17.91 (0.02) 17.90 (0.03) 17.90 (0.03)
G magnitude 17.20 (0.004) 17.23 17.20 17.20 (0.003)
BP magnitude 17.12 (0.004) 17.08
RP magnitude 17.35 (0.008) 17.35
Pan g magnitude 17.06 (0.003)
Pan r magnitude 17.38 (0.005)
Pan i magnitude 17.70 (0.003)
Pan z magnitude 17.93 (0.006)
Pan y magnitude 18.11 (0.04)
E(B-V) 0.010

* 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.