WD 1540+006

All names: SDSS J154313.53+002957.5, Gaia EDR3 4422611662452961792, Gaia DR3 4422611662452961792, Gaia DR2 4422611662452961792, SDSS J154313.53+002957.6, SDSS J154313.54+002957.50, GALEX J154313.5+002957, SDSS J154313.54+002957.5, WD 1540+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 Harris et al. 2003 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 43 13.54 (0.2) 15 43 13.53 15 43 13.54 (0.4) 15 43 13.54 15 43 13.53 (0.2) 15 43 13.53 15 43 13.22 15 43 13.54
Declination 00 29 57.51 (0.2) 00 29 57.61 00 29 57.51 (0.2) 00 29 57.51 00 29 57.58 (0.2) 00 29 57.60 00 29 50.28 00 29 57.54
Spectral type DB3-4 DB3-4 DB: DB3-4 DB DB2.8 DB DB
Effective temperature [K] 16111.0 16261.0 12709.0 12650.0 (901) 19171.0 (343) 18261.0 (437)
log(g) [cgs] 8.20 8.18 7.94 7.84 (0.1) 8.93 (0.08) 8.97 (0.1)
Mass [M] 0.716 0.703 0.552 0.498 (0.1) 1.204 (0.06)
log(Luminosity) [L]
Cooling age [Gyr] 0.2993
log(H/He) <-5.821
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] 3.00 (0.3) 3.02 (0.4) 3.00 3.00 (0.3)
Distance [pc] 333.89 (32) 330.65 (47) 333.89 333.89 (32)
Composition He
Proper motion (right ascension) [mas/yr] 7.420983756 (0.3) 7.979816235 (0.7) 7.421 (0.3) -4.6
Proper motion (declination) [mas/yr] -4.007217141 (0.2) -3.778185611 (0.6) -4.007 (0.2) -2.9
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.01 (0.02) 18.98 19.01 (0.02) 19.00 (0.02) 18.98 19.01 (0.02)
g magnitude 19.07 (0.009) 19.07 19.07 (0.009) 19.07 (0.01) 19.07 19.08 (0.01)
r magnitude 19.32 (0.01) 19.30 19.32 (0.01) 19.31 (0.02) 19.30 19.31 (0.02)
i magnitude 19.52 (0.02) 19.50 19.52 (0.02) 19.50 (0.02) 19.50 19.51 (0.02)
z magnitude 19.65 (0.07) 19.61 19.65 (0.07) 19.62 (0.07) 19.62 19.64 (0.07)
G magnitude 19.17 (0.04) 19.21 19.17 19.17 (0.004)
BP magnitude 19.27 (0.04) 19.15
RP magnitude 19.18 (0.04) 19.25
Pan g magnitude 19.09 (0.003)
Pan r magnitude 19.31 (0.005)
Pan i magnitude 19.55 (0.007)
Pan z magnitude 19.74 (0.02)
Pan y magnitude 19.80 (0.02)
E(B-V) 0.068

* 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.