SDSS J145448.78+434644.4

All names: SDSS J145448.79+434644.40, SDSS J145448.79+434644.4, Gaia DR3 1586403895138152704, Gaia DR2 1586403895138152704, SDSS J145448.78+434644.4, WD 1452+439, Gaia EDR3 1586403895138152704, GALEX J145448.7+434643

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 14 54 48.78 (0.4) 14 54 48.79 14 54 48.78 (0.4) 14 54 48.79 (0.4) 14 54 48.79 14 54 48.58 14 54 48.79
Declination 43 46 44.52 (0.5) 43 46 44.40 43 46 44.52 (0.4) 43 46 44.38 (0.5) 43 46 44.44 43 46 40.80 43 46 44.44
Spectral type DB DB DB DB DB DB
Effective temperature [K] 18156.0 15888.0 13796.0 16851.0 (580) 16568.0 (637)
log(g) [cgs] 9.20 8.34 8.11 8.45 (0.3) 8.48 (0.3)
Mass [M] 1.266 0.801 0.653 0.887 (0.2)
log(Luminosity) [L]
Cooling age [Gyr] 0.3082
log(H/He) -4.062
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] 1.50 (0.5) 1.83 (0.5) 1.50 (0.5)
Distance [pc] 668.46 (230) 545.55 (161) 668.45 (230)
Composition He
Proper motion (right ascension) [mas/yr] -6.319286397 (0.5) -5.965869343 (0.9) -6.319 (0.5) -1.0
Proper motion (declination) [mas/yr] 8.774737812 (0.7) 8.818520544 (0.9) 8.775 (0.7) 16.6
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 20.15 (0.04) 20.16 (0.04) 20.15 (0.04) 20.15 20.17 (0.04)
g magnitude 20.24 (0.02) 20.24 (0.02) 20.24 (0.02) 20.24 20.24 (0.02)
r magnitude 20.52 (0.03) 20.52 (0.03) 20.54 (0.03) 20.53 20.53 (0.03)
i magnitude 20.80 (0.06) 20.80 (0.06) 20.80 (0.06) 20.80 20.80 (0.06)
z magnitude 20.89 (0.2) 20.89 (0.2) 20.94 (0.2) 20.94 20.94 (0.2)
G magnitude 20.36 (0.09) 20.45 20.36 (0.006)
BP magnitude 20.30 (0.09) 20.25
RP magnitude 20.35 (0.1) 20.06
Pan g magnitude 20.26 (0.02)
Pan r magnitude 20.54 (0.03)
Pan i magnitude 20.77 (0.02)
Pan z magnitude 20.87 (0.09)
Pan y magnitude
E(B-V) 0.022

* 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.