US 1093

All names: Gaia DR3 820257286596513536, SDSS J095455.12+440330.3, WD 0951+442, SDSS J095455.11+440330.3, Gaia EDR3 820257286596513536, LAMOST J095455.11+440330.0, SDSS J095455.12+440330.30, US 1093, GALEX J095455.1+440329, Gaia DR2 820257286596513536

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 Nitta et al. 2009 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 54 55.10 (0.1) 09 54 55.12 09 54 55.10 (0.2) 09 54 55.10 09 54 55.13 (0.1) 09 54 55.12 09 54 54.82 09 54 55.12
Declination 44 03 29.90 (0.09) 44 03 30.39 44 03 29.91 (0.2) 44 03 29.90 44 03 30.40 (0.09) 44 03 30.34 44 03 23.04 44 03 30.32
Spectral type DB DB DB DB DB DB DB+MS
Effective temperature [K] 23829.0 18398.0 17032.0 19847.0 (263) 20072.0 (368) 21509.0 (1784) 20000.0 (341) 23140.0 (786)
log(g) [cgs] 8.30 7.99 7.92 8.08 (0.07) 8.29 (0.06) 8.06 (0.07) 8.23 (0.06) 8.14 (0.07)
Mass [M] 0.788 0.588 0.547 0.637 (0.06) 0.681 (0.04)
log(Luminosity) [L]
Cooling age [Gyr] 0.1114
log(H/He) -4.416 <-4.09
log(C/He)
log(Ca/He) <-4.52
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] 2.90 (0.1) 3.12 (0.4) 2.90 2.90 (0.1)
Distance [pc] 344.69 (18) 320.24 (40) 319.00 344.69 344.68 (18)
Composition He
Proper motion (right ascension) [mas/yr] -22.76884384 (0.1) -22.7463967 (0.4) -22.769 (0.1) -15.1
Proper motion (declination) [mas/yr] -31.62794566 (0.1) -31.8817359 (0.4) -31.628 (0.1) -33.0
Variability NOV
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity WDMS
B magnitude 18.10
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.08 (0.01) 18.08 (0.01) 18.11 (0.04) 18.11 18.12 (0.04)
g magnitude 18.16 (0.006) 18.18 18.16 (0.006) 18.18 (0.03) 18.18 18.16 (0.03)
r magnitude 18.54 (0.009) 18.54 (0.009) 18.54 (0.02) 18.54 18.54 (0.02)
i magnitude 18.78 (0.01) 18.78 (0.01) 18.78 (0.03) 18.78 18.77 (0.03)
z magnitude 19.04 (0.06) 19.04 (0.06) 19.05 (0.07) 19.05 19.05 (0.07)
G magnitude 18.37 (0.01) 18.40 18.37 18.37 (0.003)
BP magnitude 18.27 (0.01) 18.19
RP magnitude 18.54 (0.02) 18.48
Pan g magnitude 18.26 (0.008)
Pan r magnitude 18.55 (0.004)
Pan i magnitude 18.82 (0.005)
Pan z magnitude 19.07 (0.007)
Pan y magnitude 19.23 (0.01)
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.