SDSS J093857.44+002428.7

All names: SDSS J093857.45+002428.8, SDSS J093857.45+002428.80, SDSS J093857.44+002428.7, Gaia DR2 3840334940315216640, Gaia EDR3 3840334940315216640, GALEX J093857.4+002428, Gaia DR3 3840334940315216640, WD 0936+006

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 09 38 57.42 (0.4) 09 38 57.45 09 38 57.42 (0.6) 09 38 57.45 (0.4) 09 38 57.45 09 38 57.10 09 38 57.45
Declination 00 24 28.48 (0.3) 00 24 28.76 00 24 28.48 (0.5) 00 24 28.75 (0.3) 00 24 28.73 00 24 24.84 00 24 28.79
Spectral type DB DB DB DB DB DB
Effective temperature [K] 13779.0 16219.0 11992.0 14694.0 (441) 14181.0 (435)
log(g) [cgs] 7.60 7.48 7.10 7.89 (0.4) 7.90 (0.4)
Mass [M] 0.387 0.35 0.232 0.526 (0.2)
log(Luminosity) [L]
Cooling age [Gyr] 0.1675
log(H/He) <-6.095
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] 1.61 (0.5) 1.39 (0.7) 1.61 (0.5)
Distance [pc] 619.28 (177) 721.43 (390) 619.27 (177)
Composition He
Proper motion (right ascension) [mas/yr] -22.19618146 (0.5) -23.41971908 (1) -22.196 (0.5) -17.0
Proper motion (declination) [mas/yr] -16.85894013 (0.4) -17.64303941 (0.9) -16.859 (0.4) -10.6
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.77 (0.03) 19.77 (0.03) 19.79 (0.03) 19.78 19.78 (0.03)
g magnitude 19.73 (0.01) 19.73 (0.01) 19.75 (0.02) 19.74 19.74 (0.02)
r magnitude 20.00 (0.02) 20.00 (0.02) 20.01 (0.02) 20.00 20.00 (0.02)
i magnitude 20.16 (0.03) 20.16 (0.03) 20.16 (0.04) 20.15 20.16 (0.03)
z magnitude 20.42 (0.2) 20.42 (0.2) 20.46 (0.2) 20.46 20.46 (0.2)
G magnitude 19.84 (0.07) 19.89 19.84 (0.005)
BP magnitude 19.93 (0.07) 19.78
RP magnitude 19.83 (0.09) 19.90
Pan g magnitude 19.77 (0.03)
Pan r magnitude 19.97 (0.03)
Pan i magnitude 20.17 (0.02)
Pan z magnitude 20.32 (0.04)
Pan y magnitude 20.11 (0.2)
E(B-V) 0.030

* 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.