SDSS J140759.49+121533.9

All names: SDSS J140759.49+121533.9, GALEX J140759.5+121534, SDSS J140759.48+121533.8, Gaia DR3 1226456296812339200, Gaia EDR3 1226456296812339200, Gaia DR2 1226456296812339200, SDSS J140759.49+121533.8, SDSS J140759.50+121533.9, SDSS J140759.50+121534.0, SDSS J140759.50+121533.95

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Kepler et al. 2015 Vincent et al. 2024 Simbad Vincent et al. 2023
Right ascension 14 07 59.50 (0.1) 14 07 59.49 14 07 59.50 (0.2) 14 07 59.50 14 07 59.49 (0.1)
Declination 12 15 33.90 (0.1) 12 15 33.89 12 15 33.90 (0.2) 12 15 33.90 12 15 33.86 (0.1)
Spectral type DB DB DB DB DB
Effective temperature [K] 18411.0 19574.0 16319.0 18335.0 (84) 18280.0 (84) 18844.0 (1169)
log(g) [cgs] 8.10 8.26 8.06 7.96 (0.03) 7.95 (0.03) 8.14 (0.07)
Mass [M] 0.652 0.758 0.625 0.586 (0.01) 0.678 (0.06)
log(Luminosity) [L]
Cooling age [Gyr] 0.1674
log(H/He) -5.457 <-4.81
log(C/He)
log(Ca/He) <-5.94
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] 3.74 (0.2) 3.98 (0.3) 3.74 3.74 (0.2)
Distance [pc] 267.54 (11) 250.95 (19) 288.00 267.54 267.54 (11)
Composition He
Proper motion (right ascension) [mas/yr] 10.51673283 (0.2) 9.638911354 (0.5) 10.517 (0.2)
Proper motion (declination) [mas/yr] 2.800059496 (0.1) 2.9349162 (0.3) 2.8 (0.1)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude 18.62 (0.06)
H magnitude 18.50 (0.1)
K magnitude
u magnitude 17.87 (0.01) 17.85 (0.02) 17.87 (0.01)
g magnitude 17.98 (0.006) 18.00 (0.02) 17.98 (0.006)
r magnitude 18.33 (0.008) 18.32 (0.02) 18.33 (0.008)
i magnitude 18.60 (0.01) 18.60 (0.02) 18.60 (0.01)
z magnitude 18.82 (0.03) 18.83 (0.04) 18.82 (0.03)
G magnitude 18.14 (0.01) 18.18 18.14 18.14 (0.003)
BP magnitude 18.06 (0.01) 18.00
RP magnitude 18.30 (0.02) 18.28
Pan g magnitude 18.03 (0.006)
Pan r magnitude 18.32 (0.006)
Pan i magnitude 18.59 (0.008)
Pan z magnitude 18.82 (0.01)
Pan y magnitude 18.99 (0.04)
E(B-V) 0.023

* 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.