SDSS J163757.58+190526.1

All names: GALEX J163757.5+190526, SDSS J163757.58+190526.0, SDSS J163757.58+190526.02, EQ J1637+1905, Gaia DR3 4563431652837573760, Gaia EDR3 4563431652837573760, SDSS J163757.58+190526.1, Gaia DR2 4563431652837573760

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 Bedard et al. 2020 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Kepler et al. 2015 Vincent et al. 2024 Simbad Vincent et al. 2023
Right ascension 16 37 57.58 (0.1) 16 37 57.58 16 37 57.58 (0.1) 16 37 57.58 16 37 57.59 (0.1)
Declination 19 05 25.89 (0.1) 19 05 26.10 19 05 25.90 (0.1) 19 05 25.89 19 05 26.13 (0.1)
Spectral type DBA DBA DBA DB DBA DB
Effective temperature [K] 33573.0 (1762) 40662.0 24039.0 15770.0 42532.0 (754) 30034.0 (2888)
log(g) [cgs] 8.53 (0.2) 8.63 8.07 7.72 8.78 (0.07) 8.47 (0.09)
Mass [M] 0.94 (0.1) 1.009 0.648 0.443 1.073 (0.04) 0.899 (0.07)
log(Luminosity) [L] -1.06 (0.2)
Cooling age [Gyr] 0.0240 (0.01) 0.1090
log(H/He) -2
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] 2.82 (0.2) 2.45 (0.2) 2.82 2.82 (0.2)
Distance [pc] 354.75 (22) 407.62 (35) 354.75 354.76 (22)
Composition He He
Proper motion (right ascension) [mas/yr] -1.599122038 (0.1) -1.756702994 (0.3) -1.599 (0.1)
Proper motion (declination) [mas/yr] -14.70868158 (0.1) -14.67433253 (0.3) -14.709 (0.1)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.53 (0.02) 18.53 (0.02) 18.53 (0.01)
g magnitude 18.62 (0.008) 18.64 (0.01) 18.62 (0.008)
r magnitude 18.97 (0.01) 18.98 (0.02) 18.97 (0.01)
i magnitude 19.18 (0.01) 19.16 (0.02) 19.18 (0.01)
z magnitude 19.42 (0.05) 19.41 (0.05) 19.42 (0.05)
G magnitude 18.78 (0.02) 18.81 18.78 18.78 (0.003)
BP magnitude 18.73 (0.02) 18.66
RP magnitude 18.98 (0.03) 18.89
Pan g magnitude 18.67 (0.008)
Pan r magnitude 18.97 (0.007)
Pan i magnitude 19.23 (0.008)
Pan z magnitude 19.47 (0.006)
Pan y magnitude 19.52 (0.05)
E(B-V) 0.049

* 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.