SDSS J084040.43+551113.4

All names: Gaia DR2 1031044076641942656, Gaia DR3 1031044076641942656, SDSS J084040.43+551113.40, Gaia EDR3 1031044076641942656, GALEX J084040.4+551114, SDSS J084040.43+551113.4, SDSS J084040.42+551113.3

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 Simbad Kleinman et al. 2013 Vincent et al. 2023
Right ascension 08 40 40.45 (0.2) 08 40 40.43 08 40 40.45 (0.3) 08 40 40.43 (0.2) 08 40 40.43
Declination 55 11 13.25 (0.2) 55 11 13.33 55 11 13.26 (0.3) 55 11 13.33 (0.2) 55 11 13.43
Spectral type DBH: DBH DBH: DB+MS
Effective temperature [K] 16600.0 17293.0 13801.0 16591.0 (159) 16492.0 (173)
log(g) [cgs] 8.15 7.92 7.58 8.04 (0.1) 8.02 (0.1)
Mass [M] 0.685 0.549 0.38
log(Luminosity) [L]
Cooling age [Gyr] 0.1502
log(H/He) -5.532 <-4.89
log(C/He)
log(Ca/He) <-6.18
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] 2.05 (0.3) 1.95 (0.4) 2.05 (0.3)
Distance [pc] 487.55 (69) 511.55 (95) 445.00 487.54 (69)
Composition He
Proper motion (right ascension) [mas/yr] 9.359324046 (0.3) 8.459262177 (0.6) 9.359 (0.3)
Proper motion (declination) [mas/yr] -4.622844002 (0.3) -3.949415713 (0.6) -4.623 (0.3)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity WDMS
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.21 (0.02) 19.21 (0.02) 19.21 (0.03)
g magnitude 19.31 (0.01) 19.31 (0.01) 19.32 (0.03)
r magnitude 19.56 (0.02) 19.56 (0.02) 19.57 (0.02)
i magnitude 19.85 (0.03) 19.85 (0.03) 19.86 (0.03)
z magnitude 20.02 (0.1) 20.02 (0.1) 19.99 (0.1)
G magnitude 19.42 (0.03) 19.47 19.42 (0.004)
BP magnitude 19.34 (0.03) 19.33
RP magnitude 19.61 (0.06) 19.51
Pan g magnitude 19.33 (0.01)
Pan r magnitude 19.58 (0.01)
Pan i magnitude 19.83 (0.01)
Pan z magnitude 20.02 (0.03)
Pan y magnitude 19.96 (0.09)
E(B-V) 0.034

* 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.