SDSS J120728.96+440731.6

All names: SDSS J120728.96+440731.6, Gaia EDR3 1539183688952382208, SDSS J120728.95+440731.6, Gaia DR2 1539183688951638912, GALEX J120729.0+440731, Gaia DR3 1539183688952382208, WD 1204+444

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 Simbad Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 12 07 28.98 (0.2) 12 07 28.96 12 07 28.98 (0.3) 12 07 28.96 12 07 28.95 (0.2) 12 07 28.96 12 07 28.99 12 07 28.96
Declination 44 07 31.38 (0.2) 44 07 31.61 44 07 31.39 (0.2) 44 07 31.58 44 07 31.62 (0.2) 44 07 31.61 44 07 24.24 44 07 31.62
Spectral type DA DA DA DAH DAP DA_auto DA DAH DA
Effective temperature [K] 18786.9 (950) 17818.0 16750.0 18414.0 (505) 18813.0 (520)
log(g) [cgs] 8.10 (0.2) 8.06 8.00 (0) 8.01 (0.1) 7.97 (0.1)
Mass [M] 0.682158860383157 (0.2) 0.656
log(Luminosity) [L]
Cooling age [Gyr] 0.1247
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] 2.21 (0.3) 2.08 (0.4) 2.21 (0.3)
Distance [pc] 453.18 (68) 481.65 (87) 453.19 (68)
Composition H H
Proper motion (right ascension) [mas/yr] 23.34229366 (0.3) 23.06909774 (0.4) 23.342 (0.3) 25.9
Proper motion (declination) [mas/yr] -14.95362638 (0.3) -15.00188408 (0.4) -14.954 (0.3) -18.0
Variability
Magnetic yes yes
Bd [MG] 2.03 2.03 (0)
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 19.43 (0.03) 19.43 (0.03) 19.45 (0.04) 19.44 19.44 (0.04)
g magnitude 19.31 (0.01) 19.31 (0.01) 19.33 (0.03) 19.32 19.32 (0.03)
r magnitude 19.63 (0.02) 19.63 (0.02) 19.62 (0.02) 19.61 19.62 (0.02)
i magnitude 19.98 (0.03) 19.98 (0.03) 19.97 (0.03) 19.96 19.98 (0.03)
z magnitude 20.53 (0.1) 20.53 (0.1) 20.52 (0.1) 20.51 20.54 (0.1)
G magnitude 19.51 (0.03) 19.54 19.51 (0.004)
BP magnitude 19.46 (0.03) 19.45
RP magnitude 19.75 (0.08) 19.56
Pan g magnitude 19.36 (0.01)
Pan r magnitude 19.66 (0.02)
Pan i magnitude 20.00 (0.02)
Pan z magnitude 20.24 (0.05)
Pan y magnitude 20.13 (0.2)
E(B-V) 0.017

* 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.