SDSS J094534.50+343455.4

All names: SDSS J094534.50+343455.50, SDSS J094534.50+343455.3, SDSS J094534.50+343455.4, WD 0942+348, Gaia EDR3 794758546796753024, GALEX J094534.5+343455, SDSS J094534.49+343455.4, SDSS J094534.50+343455.5, Gaia DR3 794758546796753024, Gaia DR2 794758546796753024

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 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 09 45 34.50 (0.2) 09 45 34.50 09 45 34.50 (0.2) 09 45 34.50 09 45 34.50 (0.2) 09 45 34.50 09 45 34.58 09 45 34.50
Declination 34 34 55.22 (0.1) 34 34 55.45 34 34 55.23 (0.2) 34 34 55.22 34 34 55.42 (0.1) 34 34 55.47 34 34 50.88 34 34 55.46
Spectral type DB DB DB DB DB DB DB+MS
Effective temperature [K] 19467.0 18880.0 18592.0 18894.0 (130) 18126.0 (1342) 19185.0 (183) 19945.0 (387)
log(g) [cgs] 8.14 8.22 8.23 7.93 (0.05) 8.03 (0.1) 8.17 (0.05) 8.12 (0.05)
Mass [M] 0.678 0.731 0.735 0.611 (0.08) 0.663 (0.03)
log(Luminosity) [L]
Cooling age [Gyr] 0.1531
log(H/He) -5.33 <-4.49
log(C/He)
log(Ca/He) <-5.32
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] 3.41 (0.2) 3.75 (0.3) 3.41 3.41 (0.2)
Distance [pc] 293.15 (15) 266.77 (24) 321.00 293.15 293.15 (15)
Composition He
Proper motion (right ascension) [mas/yr] -2.288950932 (0.2) -2.25455581 (0.5) -2.289 (0.2) 0.2
Proper motion (declination) [mas/yr] -12.52470446 (0.1) -11.94137957 (0.5) -12.525 (0.1) -11.7
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity WDMS
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude 18.88 (0.06)
H magnitude 18.50 (0.2)
K magnitude
u magnitude 17.96 (0.01) 17.96 (0.01) 17.95 (0.03) 17.95 17.95 (0.03)
g magnitude 18.10 (0.006) 18.10 (0.006) 18.08 (0.02) 18.07 18.08 (0.02)
r magnitude 18.44 (0.008) 18.44 (0.008) 18.43 (0.03) 18.43 18.44 (0.03)
i magnitude 18.70 (0.01) 18.70 (0.01) 18.71 (0.01) 18.71 18.71 (0.02)
z magnitude 18.93 (0.04) 18.93 (0.04) 18.91 (0.04) 18.92 18.91 (0.04)
G magnitude 18.25 (0.01) 18.28 18.25 18.25 (0.003)
BP magnitude 18.17 (0.01) 18.09
RP magnitude 18.40 (0.02) 18.40
Pan g magnitude 18.13 (0.008)
Pan r magnitude 18.44 (0.006)
Pan i magnitude 18.74 (0.007)
Pan z magnitude 18.96 (0.02)
Pan y magnitude 19.16 (0.02)
E(B-V) 0.015

* 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.