WD 0843+488

All names: WD 0843+488, Gaia DR3 1015028491488955776, Gaia DR2 1015028491488955776, SDSS J084716.21+484220.40, GALEX J084716.2+484220, SDSS J084716.21+484220.3, WIRED J084716.21+484220.3, Gaia EDR3 1015028491488955776, SDSS J084716.21+484220.2, SDSS J084716.21+484220.4

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD H Gaia DR2 Stilism Koester & Kepler 2015 Ferrario et al. 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 08 47 16.18 (0.1) 08 47 16.21 08 47 16.18 (0.2) 08 47 16.18 08 47 16.22 (0.1) 08 47 16.22 08 47 15.98 08 47 16.21
Declination 48 42 20.43 (0.1) 48 42 20.27 48 42 20.42 (0.2) 48 42 20.43 48 42 20.32 (0.1) 48 42 20.30 48 42 15.48 48 42 20.37
Spectral type DA DA DB DBH DABH DAHDB DBH: DB
Effective temperature [K] 14678.0 15277.0 14429.0 15480.0 (52) 19000.0 15439.0 (698) 14806.0 (117) 50000.0 (50)
log(g) [cgs] 8.46 8.04 7.97 8.00 (0) 8.08 (0.06) 8.19 (0.08) 8.53 (0.03)
Mass [M] 0.882 0.615 0.596 0.637 (0.06)
log(Luminosity) [L]
Cooling age [Gyr] 0.2131
log(H/He) -6.05 <-5.55
log(C/He)
log(Ca/He) <-7.51
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] 4.44 (0.1) 4.47 (0.2) 4.44 4.44 (0.1)
Distance [pc] 225.16 (7) 223.81 (10) 232.00 225.16 225.16 (7)
Composition H
Proper motion (right ascension) [mas/yr] -24.6453505 (0.2) -24.40280423 (0.3) -24.645 (0.2) -21.4
Proper motion (declination) [mas/yr] 6.906806351 (0.1) 6.74512562 (0.4) 6.907 (0.1) 7.3
Variability
Magnetic yes yes
Bd [MG] 3
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 17.88 (0.01) 17.88 (0.01) 17.85 (0.02) 17.86 17.89 (0.02)
g magnitude 17.89 (0.006) 17.89 (0.006) 17.89 (0.02) 17.88 17.91 (0.02)
r magnitude 18.20 (0.007) 18.20 (0.007) 18.21 (0.01) 18.20 18.20 (0.01)
i magnitude 18.43 (0.01) 18.43 (0.01) 18.43 (0.02) 18.48 18.44 (0.02)
z magnitude 18.71 (0.04) 18.71 (0.04) 18.73 (0.03) 18.68 18.75 (0.03)
G magnitude 18.07 (0.008) 18.10 18.07 18.07 (0.003)
BP magnitude 18.03 (0.008) 17.98
RP magnitude 18.20 (0.02) 18.17
Pan g magnitude 17.97 (0.005)
Pan r magnitude 18.23 (0.004)
Pan i magnitude 18.52 (0.006)
Pan z magnitude 18.74 (0.008)
Pan y magnitude 18.87 (0.03)
E(B-V) 0.011

* 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.