SDSS J155747.14+064500.4

All names: Gaia EDR3 4426963048440293120, Gaia DR2 4426963048440293120, SDSS J155747.14+064500.40, SDSS J155747.13+064500.3, GALEX J155747.1+064500, Gaia DR3 4426963048440293120, SDSS J155747.14+064500.4

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 Kleinman et al. 2013 Vincent et al. 2023
Right ascension 15 57 47.14 (0.3) 15 57 47.14 15 57 47.14 (0.4) 15 57 47.14 (0.3) 15 57 47.14
Declination 06 45 00.21 (0.2) 06 45 00.40 06 45 00.22 (0.3) 06 45 00.45 (0.2) 06 45 00.41
Spectral type DB DB DB DB+MS
Effective temperature [K] 15262.0 14710.0 13390.0 16348.0 (1389)
log(g) [cgs] 7.88 8.29 8.20 8.68 (0.3)
Mass [M] 0.525 0.769 0.709 1.016 (0.2)
log(Luminosity) [L]
Cooling age [Gyr] 0.3890
log(H/He) -4.076
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] 2.26 (0.3) 3.18 (0.5) 2.26 (0.3)
Distance [pc] 442.16 (61) 314.50 (50) 442.16 (61)
Composition He
Proper motion (right ascension) [mas/yr] 3.501361806 (0.3) 3.226229829 (0.8) 3.501 (0.3)
Proper motion (declination) [mas/yr] -15.30599586 (0.2) -14.9391456 (0.5) -15.306 (0.2)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity WDMS
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.14 (0.02) 19.14 (0.02) 19.08 (0.04)
g magnitude 19.20 (0.01) 19.20 (0.01) 19.17 (0.02)
r magnitude 19.48 (0.01) 19.48 (0.01) 19.48 (0.02)
i magnitude 19.69 (0.02) 19.69 (0.02) 19.75 (0.02)
z magnitude 19.89 (0.1) 19.89 (0.1) 19.84 (0.07)
G magnitude 19.32 (0.03) 19.35 19.32 (0.004)
BP magnitude 19.30 (0.03) 19.34
RP magnitude 19.53 (0.06) 19.48
Pan g magnitude 19.23 (0.005)
Pan r magnitude 19.46 (0.01)
Pan i magnitude 19.71 (0.01)
Pan z magnitude 19.90 (0.03)
Pan y magnitude 19.90 (0.08)
E(B-V) 0.041

* 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.