SDSS J155713.74+280339.0

All names: GALEX J155713.7+280339, SDSS J155713.74+280338.7, SDSS J155713.74+280339.10, Gaia DR3 1319620734533792128, Gaia DR2 1319620734533792128, Gaia EDR3 1319620734533792128, LAMOST J155713.74+280339.0, SDSS J155713.74+280339.0, WD 1555+282, SDSS J155713.74+280339.1

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism 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 15 57 13.73 (0.2) 15 57 13.74 15 57 13.73 (0.2) 15 57 13.73 15 57 13.74 (0.1) 15 57 13.74 15 57 13.15 15 57 13.74
Declination 28 03 38.54 (0.1) 28 03 39.07 28 03 38.56 (0.2) 28 03 38.54 28 03 39.23 (0.1) 28 03 39.09 28 03 36.72 28 03 39.09
Spectral type DB DB DB DB DB DB DB
Effective temperature [K] 15261.0 15508.0 13591.0 16511.0 (1727) 16082.0 (354) 15389.0 (399)
log(g) [cgs] 8.18 8.09 7.95 8.16 (0.1) 8.41 (0.2) 8.36 (0.3)
Mass [M☉] 0.696 0.641 0.556 0.691 (0.1) 0.808 (0.2)
log(Luminosity) [L☉]
Cooling age [Gyr] 0.2470
log(H/He) -5.912
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] 2.63 (0.2) 2.72 (0.3) 2.63 2.63 (0.2)
Distance [pc] 379.79 (30) 367.75 (36) 379.79 379.79 (30)
Composition He
Proper motion (right ascension) [mas/yr] -6.7490641 (0.2) -7.285424318 (0.4) -6.749 (0.2) -5.5
Proper motion (declination) [mas/yr] -43.10263274 (0.2) -43.56715028 (0.5) -43.103 (0.2) -43.1
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.11 (0.02) 19.11 (0.02) 19.10 (0.03) 19.10 19.10 (0.03)
g magnitude 19.13 (0.01) 19.13 (0.01) 19.14 (0.01) 19.14 19.14 (0.01)
r magnitude 19.38 (0.01) 19.38 (0.01) 19.37 (0.02) 19.37 19.37 (0.02)
i magnitude 19.62 (0.02) 19.62 (0.02) 19.62 (0.02) 19.61 19.62 (0.02)
z magnitude 19.89 (0.08) 19.89 (0.08) 19.88 (0.08) 19.88 19.89 (0.08)
G magnitude 19.24 (0.02) 19.29 19.24 19.24 (0.003)
BP magnitude 19.24 (0.02) 19.22
RP magnitude 19.41 (0.05) 19.31
Pan g magnitude 19.16 (0.01)
Pan r magnitude 19.39 (0.009)
Pan i magnitude 19.63 (0.01)
Pan z magnitude 19.88 (0.04)
Pan y magnitude 19.85 (0.09)
E(B-V) 0.032

* 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.