SDSS J040836.75+155149.4

All names: SDSS J040836.75+155149.3, SDSS J040836.75+155149.4, Gaia EDR3 45278782185566336, SDSS J040836.75+155149.40, Gaia DR3 45278782185566336, GALEX J040836.7+155149, Gaia DR2 45278782185566336, SDSS J040836.74+155149.3

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 Kleinman et al. 2013 Vincent et al. 2023
Right ascension 04 08 36.74 (0.3) 04 08 36.75 04 08 36.74 (0.5) 04 08 36.75 (0.3) 04 08 36.75
Declination 15 51 49.23 (0.2) 15 51 49.36 15 51 49.24 (0.2) 15 51 49.47 (0.2) 15 51 49.39
Spectral type DBAH: DBAH DBAH: DB+MS
Effective temperature [K] 18780.0 15379.0 9173.0 18318.0 (198) 19127.0 (348)
log(g) [cgs] 8.37 7.56 7.03 8.09 (0.07) 8.17 (0.07)
Mass [M] 0.829 0.376 0.202
log(Luminosity) [L]
Cooling age [Gyr] 0.3386
log(H/He) -4.37 -4.42 (0.4)
log(C/He)
log(Ca/He) <-5.09
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] 2.60 (0.4) 2.53 (0.5) 2.60 (0.4)
Distance [pc] 384.18 (54) 394.52 (81) 346.00 384.19 (54)
Composition He
Proper motion (right ascension) [mas/yr] -9.077891773 (0.4) -8.896122428 (1) -9.078 (0.4)
Proper motion (declination) [mas/yr] -14.77091273 (0.3) -14.67980407 (0.7) -14.771 (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 19.36 (0.03) 19.36 (0.03) 19.34 (0.04)
g magnitude 19.21 (0.01) 19.21 (0.01) 19.24 (0.02)
r magnitude 19.25 (0.01) 19.25 (0.01) 19.25 (0.02)
i magnitude 19.38 (0.02) 19.38 (0.02) 19.36 (0.02)
z magnitude 19.52 (0.05) 19.52 (0.05) 19.52 (0.05)
G magnitude 19.18 (0.03) 19.22 19.18 (0.004)
BP magnitude 19.23 (0.03) 19.26
RP magnitude 19.18 (0.05) 19.11
Pan g magnitude 19.24 (0.03)
Pan r magnitude 19.26 (0.01)
Pan i magnitude 19.42 (0.01)
Pan z magnitude 19.50 (0.02)
Pan y magnitude 19.57 (0.05)
E(B-V) 0.429

* 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.