WD J2209+1223

All names: J2209+1223, Gaia EDR3 2727904257071365760, SDSS J220934.85+122336.60, Gaia DR3 2727904257071365760, Gaia DR2 2727904257071365760, WD 2207+121, SDSS J220934.84+122336.5, SDSS J220934.85+122336.6

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Genest-Beaulieu & Bergeron 2019 (spectroscopic) Genest-Beaulieu & Bergeron 2019 (photometric) Coutu et al. 2019 Gaia DR2 Stilism Koester & Kepler 2015 Xu et al. 2012 Vincent et al. 2024 Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 22 09 34.83 (0.09) 22 09 34.85 22 09 34.85 22 09 34.83 (0.1) 22 09 34.83 22 09 34.85 22 09 34.97 22 09 34.85
Declination 12 23 36.34 (0.09) 12 23 36.56 12 23 36.56 12 23 36.35 (0.1) 12 23 36.34 12 23 36.57 12 23 33.72 12 23 36.58
Spectral type DBZ DBZ DB DBZ DBZ DBZH: DB
Effective temperature [K] 17356.0 15131.0 14752.0 (1192) 17103.0 (72) 17300.0 14235.0 (495) 17349.0 (78) 17131.0 (82)
log(g) [cgs] 8.23 7.96 7.97 8.17 (0.04) 7.88 (0.05) 8.24 (0.04) 8.25 (0.04)
Mass [M] 0.737 0.569 0.5706 0.519 (0.04)
log(Luminosity) [L]
Cooling age [Gyr] 0.1990
log(H/He) <-6.028 <-5.9514 <-5.23
log(C/He)
log(Ca/He) -7.2997 (0.1) -6.04 (0.2)
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] 6.08 (0.1) 6.03 6.03 (0.1) 6.08
Distance [pc] 164.49 (3) 165.75 (4) 165.75 (4) 159.00 164.49
Composition He
Proper motion (right ascension) [mas/yr] -18.43426739 (0.1) -18.36498825 (0.2) -18.5
Proper motion (declination) [mas/yr] -13.42647401 (0.1) -13.57754259 (0.2) -16.2
Variability
Magnetic
Bd [MG]
Infrared excess (disk) yes
Binarity
B magnitude
V magnitude 17.43
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 17.10 (0.008) 17.11 (0.02) 17.11 17.12 (0.02)
g magnitude 17.17 (0.005) 17.18 (0.01) 17.17 17.18 (0.01)
r magnitude 17.47 (0.006) 17.48 (0.01) 17.48 17.48 (0.01)
i magnitude 17.68 (0.007) 17.71 (0.01) 17.71 17.70 (0.02)
z magnitude 17.91 (0.02) 17.91 (0.02) 17.91 17.89 (0.02)
G magnitude 17.32 (0.02) 17.35 17.32
BP magnitude 17.23 (0.02) 17.20
RP magnitude 17.38 (0.01) 17.39
Pan g magnitude 17.21 (0.003)
Pan r magnitude 17.48 (0.006)
Pan i magnitude 17.72 (0.004)
Pan z magnitude 17.93 (0.009)
Pan y magnitude 18.08 (0.03)
E(B-V) 0.016

* 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.