WD 1635-000

All names: SDSS J163807.33-000837.6, SDSS J163807.32-000837.6, Gaia EDR3 4383300754505881856, GALEX J163807.3-000838, WD 1635-000, Gaia DR2 4383300754505881856, SDSS J163807.33-000837.60, SDSS J163807.32-000837.7, SDSS J163807.33-000837.7, Gaia DR3 4383300754505881856

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 Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 16 38 07.33 (0.4) 16 38 07.33 16 38 07.33 (0.6) 16 38 07.33 (0.4) 16 38 07.33 16 38 06.89 16 38 07.33
Declination -00 08 37.92 (0.2) -00 08 37.68 -00 08 37.91 (0.3) -00 08 37.72 (0.2) -00 08 37.68 -00 08 31.92 -00 08 37.64
Spectral type DB4 DB4 DB4 DB DB2.9 DB DB
Effective temperature [K] 17153.0 14737.0 12895.0 17231.0 (359) 16639.0 (374)
log(g) [cgs] 8.20 7.17 7.14 8.14 (0.2) 8.09 (0.2)
Mass [M] 0.715 0.259 0.244 0.639 (0.1)
log(Luminosity) [L]
Cooling age [Gyr] 0.1386
log(H/He) -4.084
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] 0.77 (0.5) 1.23 (0.7) 0.77 (0.5)
Distance [pc] 1305.08 (818) 812.14 (462) 1305.14 (818)
Composition He
Proper motion (right ascension) [mas/yr] 1.110074464 (0.5) 0.753781472 (1) 1.11 (0.5) 4.9
Proper motion (declination) [mas/yr] -12.17798697 (0.4) -11.56447719 (0.8) -12.178 (0.4) -5.3
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.93 (0.04) 19.96 19.93 (0.04) 19.95 (0.04) 19.96 19.93 (0.03)
g magnitude 19.88 (0.02) 19.88 19.88 (0.02) 19.88 (0.01) 19.88 19.85 (0.02)
r magnitude 20.05 (0.02) 20.07 20.05 (0.02) 20.07 (0.02) 20.07 20.05 (0.02)
i magnitude 20.24 (0.04) 20.30 20.24 (0.04) 20.29 (0.03) 20.29 20.29 (0.03)
z magnitude 20.43 (0.2) 20.33 20.43 (0.2) 20.32 (0.1) 20.33 20.33 (0.1)
G magnitude 19.94 (0.04) 19.99 19.94 (0.005)
BP magnitude 19.95 (0.04) 20.07
RP magnitude 19.90 (0.07) 20.07
Pan g magnitude 19.88 (0.008)
Pan r magnitude 20.11 (0.01)
Pan i magnitude 20.33 (0.01)
Pan z magnitude 20.41 (0.06)
Pan y magnitude 20.87 (0.2)
E(B-V) 0.108

* 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.