SDSS J154152.17+475254.3

All names: SDSS J154152.17+475254.3, Gaia DR3 1401492771222788992, SDSS J154152.20+475253.75, SDSS J154152.20+475253.7, Gaia DR2 1401492771222788992, GALEX J154152.1+475254, SDSS J154152.20+475253.8, Gaia EDR3 1401492771222788992

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Kepler et al. 2016 Koester & Kepler 2015 Simbad Vincent et al. 2023
Right ascension 15 41 52.19 (0.1) 15 41 52.18 15 41 52.19 (0.2) 15 41 52.17 (0.1)
Declination 47 52 53.64 (0.2) 47 52 54.31 47 52 53.66 (0.2) 47 52 54.42 (0.2)
Spectral type DB DB DB DB+MS
Effective temperature [K] 16219.0 17394.0 14295.0 37090.0 (575) 16517.0 (114)
log(g) [cgs] 8.00 8.17 7.87 7.77 (0.05) 8.12 (0.07)
Mass [M] 0.593 0.696 0.517 0.52 (0.02)
log(Luminosity) [L]
Cooling age [Gyr] 0.1895
log(H/He) -5.669 <-5.06
log(C/He)
log(Ca/He) <-6.43
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] 2.52 (0.2) 2.75 (0.2) 2.52 (0.2)
Distance [pc] 396.57 (26) 363.35 (28) 348.00 396.57 (26)
Composition He
Proper motion (right ascension) [mas/yr] 7.719668537 (0.2) 8.445617808 (0.3) 7.72 (0.2)
Proper motion (declination) [mas/yr] -48.86759857 (0.2) -49.15508537 (0.5) -48.868 (0.2)
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 18.79 (0.02) 18.80 (0.02) 18.80 (0.02)
g magnitude 18.83 (0.009) 18.84 (0.02) 18.83 (0.009)
r magnitude 19.16 (0.01) 19.17 (0.02) 19.16 (0.01)
i magnitude 19.45 (0.02) 19.46 (0.03) 19.45 (0.02)
z magnitude 19.67 (0.09) 19.74 (0.1) 19.69 (0.09)
G magnitude 18.99 (0.04) 19.03 18.99 (0.004)
BP magnitude 19.07 (0.04) 18.88
RP magnitude 19.13 (0.05) 19.03
Pan g magnitude 18.90 (0.007)
Pan r magnitude 19.15 (0.008)
Pan i magnitude 19.41 (0.006)
Pan z magnitude 19.59 (0.02)
Pan y magnitude 19.83 (0.08)
E(B-V) 0.019

* 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.