WD 1725+635

All names: SDSS J172551.69+633142.50, Gaia DR3 1440413696139825920, GALEX J172551.7+633142, SDSS J172551.69+633142.5, SDSS J172551.68+633142.3, Gaia EDR3 1440413696139825920, SDSS J172551.68+633142.4, Gaia DR2 1440413696139825920, WD 1725+635, SDSS J172551.69+633142.4

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 17 25 51.68 (0.2) 17 25 51.69 17 25 51.68 (0.2) 17 25 51.69 (0.2) 17 25 51.69 17 25 51.02 17 25 51.69
Declination 63 31 42.58 (0.2) 63 31 42.44 63 31 42.58 (0.4) 63 31 42.39 (0.2) 63 31 42.42 63 31 36.48 63 31 42.47
Spectral type DB_A: DBAH DB_A: DB2.6 DBAH: DB
Effective temperature [K] 17643.0 21164.0 14488.0 17950.0 (140) 18361.0 (321) 18598.0 (501)
log(g) [cgs] 8.29 8.24 7.78 8.12 (0.07) 8.40 (0.1) 8.45 (0.1)
Mass [M] 0.774 0.743 0.468
log(Luminosity) [L]
Cooling age [Gyr] 0.1585
log(H/He) -5.21 <-4.7
log(C/He)
log(Ca/He) <-5.52
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] 2.33 (0.2) 2.35 (0.3) 2.33 (0.2)
Distance [pc] 428.81 (33) 425.86 (48) 397.00 428.82 (33)
Composition He
Proper motion (right ascension) [mas/yr] -1.897857559 (0.3) -2.183379851 (0.5) -1.898 (0.3) -0.7
Proper motion (declination) [mas/yr] 12.09779557 (0.3) 11.50361563 (0.9) 12.098 (0.3) 14.9
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.82 (0.02) 18.82 (0.02) 18.89 (0.03) 18.88 18.89 (0.02)
g magnitude 18.96 (0.009) 18.96 (0.009) 19.00 (0.02) 19.01 19.00 (0.02)
r magnitude 19.32 (0.01) 19.32 (0.01) 19.33 (0.02) 19.32 19.34 (0.02)
i magnitude 19.57 (0.02) 19.57 (0.02) 19.52 (0.03) 19.52 19.53 (0.03)
z magnitude 19.74 (0.08) 19.74 (0.08) 19.65 (0.1) 19.63 19.66 (0.1)
G magnitude 19.16 (0.02) 19.20 19.16 (0.004)
BP magnitude 19.14 (0.02) 19.10
RP magnitude 19.25 (0.06) 19.19
Pan g magnitude 19.07 (0.01)
Pan r magnitude 19.35 (0.01)
Pan i magnitude 19.59 (0.01)
Pan z magnitude 19.78 (0.02)
Pan y magnitude 19.98 (0.2)
E(B-V) 0.024

* 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.