SDSS J172520.14+244604.9

All names: SDSS J172520.13+244604.8, GALEX J172520.1+244605, Gaia DR2 4570232849513416704, SDSS J172520.13+244604.7, Gaia DR3 4570232849513416704, SDSS J172520.14+244604.94, Gaia EDR3 4570232849513416704, SDSS J172520.14+244604.9

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) MWDD HE Gaia DR2 Stilism Koester & Kepler 2015 Kepler et al. 2015 Simbad Vincent et al. 2023
Right ascension 17 25 20.14 (0.2) 17 25 20.13 17 25 20.14 (0.2) 17 25 20.14 (0.2)
Declination 24 46 04.92 (0.2) 24 46 04.81 24 46 04.92 (0.3) 24 46 04.76 (0.2)
Spectral type DB DB DB DB+MS
Effective temperature [K] 15881.0 18243.0 13416.0 15721.0 (78) 15760.0 (122)
log(g) [cgs] 8.24 7.87 7.49 8.00 (0) 8.07 (0.08)
Mass [M] 0.74 0.522 0.344 0.635 (0.05)
log(Luminosity) [L]
Cooling age [Gyr] 0.1539
log(H/He) -5.619 <-5.12
log(C/He)
log(Ca/He) <-6.84
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] 2.48 (0.3) 1.87 (0.5) 2.48 (0.3)
Distance [pc] 402.85 (42) 535.43 (140) 427.00 402.85 (42)
Composition He
Proper motion (right ascension) [mas/yr] -0.09145666 (0.2) 0.29565322 (0.5) -0.091 (0.2)
Proper motion (declination) [mas/yr] 10.45588847 (0.3) 11.94421151 (0.9) 10.456 (0.3)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity WDMS
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.28 (0.02) 19.26 (0.03) 19.28 (0.02)
g magnitude 19.31 (0.01) 19.31 (0.01) 19.31 (0.01)
r magnitude 19.62 (0.01) 19.61 (0.01) 19.62 (0.01)
i magnitude 19.83 (0.02) 19.82 (0.02) 19.83 (0.02)
z magnitude 20.08 (0.1) 20.09 (0.1) 20.08 (0.1)
G magnitude 19.45 (0.03) 19.49 19.45 (0.004)
BP magnitude 19.42 (0.03) 19.45
RP magnitude 19.59 (0.05) 19.53
Pan g magnitude 19.38 (0.009)
Pan r magnitude 19.61 (0.02)
Pan i magnitude 19.87 (0.01)
Pan z magnitude 19.99 (0.04)
Pan y magnitude 20.12 (0.2)
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.