SDSS J083448.91+381414.4

All names: SDSS J083448.91+381414.4, SDSS J083448.91+381414.50, GALEX J083448.9+381415, WD 0831+384.1, SDSS J083448.91+381414.5, Gaia EDR3 911001389986757760, SDSS J083448.90+381414.4, Gaia DR2 911001389986757760, Gaia DR3 911001389986757760

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 08 34 48.90 (0.5) 08 34 48.91 08 34 48.90 (0.7) 08 34 48.91 (0.5) 08 34 48.91 08 34 49.18 08 34 48.91
Declination 38 14 14.00 (0.3) 38 14 14.43 38 14 14.02 (0.5) 38 14 14.48 (0.3) 38 14 14.45 38 14 08.88 38 14 14.47
Spectral type DB DB DB DB DB: DB
Effective temperature [K] 13084.0 12415.0 10866.0 13684.0 (505) 13077.0 (502)
log(g) [cgs] 7.54 8.04 7.87 7.82 (0.4) 8.02 (0.4)
Mass [M] 0.364 0.607 0.509
log(Luminosity) [L]
Cooling age [Gyr] 0.4209
log(H/He) <-6.047
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] 1.81 (0.6) 2.29 (0.8) 1.81 (0.6)
Distance [pc] 552.67 (188) 436.84 (156) 552.67 (188)
Composition He
Proper motion (right ascension) [mas/yr] -11.46231101 (0.7) -11.39301308 (1) -11.462 (0.7) -15.8
Proper motion (declination) [mas/yr] -29.79520541 (0.5) -29.08539205 (1) -29.795 (0.5) -31.5
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 20.09 (0.04) 20.09 (0.04) 20.04 (0.04) 20.03 20.06 (0.04)
g magnitude 20.01 (0.02) 20.01 (0.02) 20.00 (0.02) 20.00 20.01 (0.02)
r magnitude 20.16 (0.03) 20.16 (0.03) 20.17 (0.03) 20.17 20.17 (0.03)
i magnitude 20.41 (0.04) 20.41 (0.04) 20.34 (0.04) 20.34 20.35 (0.04)
z magnitude 20.49 (0.2) 20.50 (0.2) 20.54 (0.2) 20.55 20.55 (0.2)
G magnitude 20.08 (0.06) 20.14 20.08 (0.005)
BP magnitude 20.16 (0.06) 20.05
RP magnitude 20.03 (0.09) 19.84
Pan g magnitude 20.04 (0.02)
Pan r magnitude 20.17 (0.02)
Pan i magnitude 20.35 (0.02)
Pan z magnitude 20.49 (0.04)
Pan y magnitude 19.52 (0.2)
E(B-V) 0.029

* 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.