SDSS J163654.41+230236.0

All names: Gaia DR2 1299640714175041408, SDSS J163654.41+230236.0, SDSS J163654.42+230236.0, SDSS J163654.42+230236.10, SDSS J163654.42+230236.1, GALEX J163654.4+230235, Gaia DR3 1299640714175041408, WD 1634+231, Gaia EDR3 1299640714175041408

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 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 16 36 54.36 (0.06) 16 36 54.42 16 36 54.36 (0.09) 16 36 54.36 16 36 54.43 (0.06) 16 36 54.42 16 36 54.19 16 36 54.42
Declination 23 02 36.00 (0.07) 23 02 36.08 23 02 36.00 (0.1) 23 02 36.00 23 02 36.07 (0.07) 23 02 36.08 23 02 30.12 23 02 36.08
Spectral type DB DB DB DB DB DBH DB
Effective temperature [K] 18689.0 17718.0 14923.0 17973.0 (118) 16345.0 (661) 18441.0 (142) 18605.0 (206)
log(g) [cgs] 8.10 8.07 7.84 7.75 (0.05) 7.93 (0.06) 8.06 (0.05) 8.00 (0.05)
Mass [M] 0.656 0.634 0.5 0.552 (0.04)
log(Luminosity) [L]
Cooling age [Gyr] 0.1561
log(H/He) -5.607 <-4.74
log(C/He)
log(Ca/He) <-5.84
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] 4.05 (0.1) 4.10 (0.1) 4.05 4.05 (0.1)
Distance [pc] 246.75 (6) 244.13 (8) 299.00 246.75 246.76 (6)
Composition He
Proper motion (right ascension) [mas/yr] -58.8375289 (0.08) -58.63023971 (0.2) -58.838 (0.08) -56.5
Proper motion (declination) [mas/yr] -4.430210481 (0.1) -4.106927451 (0.2) -4.43 (0.1) -5.5
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 17.76 (0.01) 17.76 (0.01) 17.75 (0.02) 17.75 17.76 (0.02)
g magnitude 17.83 (0.006) 17.83 (0.006) 17.84 (0.01) 17.83 17.84 (0.01)
r magnitude 18.13 (0.007) 18.13 (0.007) 18.13 (0.01) 18.13 18.14 (0.01)
i magnitude 18.40 (0.009) 18.40 (0.009) 18.40 (0.02) 18.40 18.40 (0.02)
z magnitude 18.63 (0.03) 18.62 (0.03) 18.69 (0.03) 18.69 18.66 (0.03)
G magnitude 17.97 (0.006) 18.00 17.97 17.97 (0.003)
BP magnitude 17.92 (0.006) 17.85
RP magnitude 18.07 (0.01) 18.08
Pan g magnitude 17.87 (0.005)
Pan r magnitude 18.14 (0.006)
Pan i magnitude 18.41 (0.005)
Pan z magnitude 18.63 (0.008)
Pan y magnitude 18.74 (0.02)
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.