SDSS J031824.20+422650.9

All names: SDSS J031824.19+422651.0, WD 0315+422, Gaia DR2 239717998989931136, Gaia EDR3 239717998989931136, Gaia DR3 239717998989931136, SDSS J031824.20+422651.0, SDSS J031824.20+422650.9, SDSS J031824.19+422651.1

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Hardy et al. 2023a MWDD H Gaia DR2 Stilism Ferrario et al. 2015 Kulebi et al. 2009 Vincent et al. 2024 Simbad White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 03 18 24.24 (0.1) 03 18 24.19 03 18 24.24 (0.2) 03 18 24.19 03 18 24.24 03 18 24.19 (0.1) 03 18 23.86 03 18 24.20
Declination 42 26 50.64 (0.1) 42 26 51.10 42 26 50.66 (0.1) 42 26 51.00 42 26 50.64 42 26 51.20 (0.1) 42 26 48.84 42 26 51.00
Spectral type DAH DA DA DAH DA: DAH DAH4.8 DAH DAH
Effective temperature [K] 10464.9 (174) 10985.0 10500.0 10672.0 (322) 20274.0 (98)
log(g) [cgs] 8.34 (0.2) 8.43 8.00 (0) 8.41 (0.04) 10.00 (0.002)
Mass [M] 0.8167606922458693 (0.2) 0.875 0.86 (0.04)
log(Luminosity) [L]
Cooling age [Gyr] 0.8959
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
log(C/H)
log(N/H)
log(O/H)
log(Na/H)
log(Mg/H)
log(Al/H)
log(Si/H)
log(P/H)
log(S/H)
log(Sc/H)
log(Ti/H)
log(Cr/H)
log(Mn/H)
log(Fe/H)
log(Ni/H)
Parallax [mas] 7.56 (0.2) 7.40 (0.2) 7.56 7.56 (0.2)
Distance [pc] 132.20 (3) 135.06 (4) 132.20 132.20 (3)
Composition H H
Proper motion (right ascension) [mas/yr] 35.74349948 (0.2) 35.534731 (0.4) 35.743 (0.2)
Proper motion (declination) [mas/yr] -34.64255222 (0.2) -34.74035105 (0.3) -34.643 (0.2)
Variability
Magnetic yes yes yes yes
Bd [MG] 4.908416471737127 10.12 (0.1) 10.12 (0.1)
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.58 (0.02) 18.58 (0.01) 18.59 18.56 (0.02)
g magnitude 18.29 (0.007) 18.30 (0.007) 18.23 18.21 (0.01)
r magnitude 18.28 (0.008) 18.29 (0.008) 18.32 18.29 (0.01)
i magnitude 18.43 (0.009) 18.44 (0.009) 18.43 18.42 (0.01)
z magnitude 18.64 (0.03) 18.64 (0.03) 18.67 18.69 (0.04)
G magnitude 18.21 (0.01) 18.24 18.21 18.21 (0.003)
BP magnitude 18.27 (0.01) 18.28
RP magnitude 18.18 (0.02) 18.20
Pan g magnitude 18.20 (0.01)
Pan r magnitude 18.31 (0.005)
Pan i magnitude 18.47 (0.005)
Pan z magnitude 18.67 (0.02)
Pan y magnitude 18.83 (0.01)
E(B-V) 0.043

* 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.