SDSS J223954.12+001847.4

All names: J2239+0018, SDSS J223954.12+001847.5, Gaia DR3 2654379433485461632, Gaia DR2 2654379433485461632, SDSS J223954.12+001847.4, USNO-B1.0 0903-00582285, Gaia EDR3 2654379433485461632, SDSS J223954.12+001847.3, WDJ223954.13+001847.11, WD 2237+000.1

Parameter Unit Gaia EDR3 SDSS DR12 Caron et al. 2023 Bergeron et al. 2022 MWDD H MWDD HE Gaia DR2 Stilism Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 22 39 54.12 (0.4) 22 39 54.12 22 39 54.12 (1) 22 39 54.13 (0.4) 22 39 54.12 22 39 53.69 22 39 54.12
Declination 00 18 48.96 (0.4) 00 18 47.56 00 18 48.90 (0.5) 00 18 47.12 (0.4) 00 18 48.90 00 18 45.72 00 18 47.37
Spectral type DC DC DC DC DC DC11.4 DC DZ
Effective temperature [K] 4582.0 (73) 4616.0 (61) 8032.0 7761.0 6301.0 (5)
log(g) [cgs] 8.31 (0.1) 9.44 9.37 10.00 (0.004)
Mass [M☉] 0.773 (0.1) 0.646 (0.04) 1.346 1.314
log(Luminosity) [L☉]
Cooling age [Gyr] 8.2400 7.1380 2.2790 2.1530
log(H/He) -2.33 -2.73
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] 12.16 (0.5) 13.84 (1) 13.84 (1) 12.16 (0.5) 13.84 (1)
Distance [pc] 82.24 (3) 72.25 (7) 72.24 (7) 82.24 (3) 72.24 (7)
Composition He
Proper motion (right ascension) [mas/yr] -1.756023259 (0.6) -1.749561525 (1) -1.756 (0.6) -1.749561525
Proper motion (declination) [mas/yr] 114.9906478 (0.4) 115.4754987 (1) 114.991 (0.4) 115.4754987
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 20.10
V magnitude
R magnitude 18.60
I magnitude
J magnitude 19.69 (0.2) 19.69 (0.2)
H magnitude 19.99 (0.08)
K magnitude
u magnitude 21.29 (0.09) 21.53 (0.1) 21.29 (0.09) 21.31 (0.1) 21.00 21.47 (0.1)
g magnitude 20.17 (0.02) 20.17 (0.02) 20.23 (0.02) 21.00 20.16 (0.03)
r magnitude 19.61 (0.02) 19.61 (0.02) 19.62 (0.02) 19.51 (0.04)
i magnitude 19.50 (0.02) 19.50 (0.02) 19.57 (0.02) 19.48 (0.05)
z magnitude 20.32 (0.1) 20.32 (0.1) 20.03 (0.1) 20.07 (0.2)
G magnitude 19.67 (0.1) 19.72 19.67 (0.006) 19.72
BP magnitude 19.81 (0.1) 19.81 19.81
RP magnitude 19.07 (0.09) 18.99 18.99
Pan g magnitude 19.99 (0.02)
Pan r magnitude 19.48 (0.009)
Pan i magnitude 19.46 (0.02)
Pan z magnitude 19.67 (0.05)
Pan y magnitude
E(B-V) 0.006

* 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.