All names: GALEX J084022.4+374251, KUV 08371+3754, SDSS J084022.37+374250.98, CSO 198, SDSS J084022.36+374250.9, WD 0837+378, Gaia EDR3 910001899563870592, Gaia DR3 910001899563870592, Gaia DR2 910001899563870592, SDSS J084022.41+374251.5, SDSS J084022.37+374250.9
Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | SDSS DR12 | MWDD H | Gaia DR2 | Stilism | Kepler et al. 2015 | Gianninas et al. 2011 | Vincent et al. 2024 | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Vincent et al. 2023 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Right ascension | 08 40 22.33 (0.09) | 08 40 22.41 | 08 40 22.41 | 08 40 22.34 (0.1) | 08 40 22.33 | 08 40 22.43 (0.09) | 08 40 22.63 | |||||||
Declination | 37 42 50.52 (0.06) | 37 42 51.59 | 37 42 51.59 | 37 42 50.56 (0.07) | 37 42 50.52 | 37 42 51.73 (0.06) | 37 42 50.04 | |||||||
Spectral type | DA | DA | DA | DA | DA3.4 | DA | DA | |||||||
Effective temperature | [K] | 12996.0 | 13884.0 (98) | 15020.0 (463) | 13017.0 (408) | |||||||||
log(g) | [cgs] | 8.34 | 8.43 (0.02) | 8.29 (0.06) | 8.31 (0.03) | |||||||||
Mass | [M☉] | 0.823 | 0.865 (0.01) | 0.79 (0.04) | 0.804 (0.02) | |||||||||
log(Luminosity) | [L☉] | |||||||||||||
Cooling age | [Gyr] | 0.5062 | ||||||||||||
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] | 7.24 (0.1) | 7.41 (0.2) | 7.24 | 7.24 (0.1) | |||||||||
Distance | [pc] | 138.08 (2) | 135.04 (3) | 144.00 | 138.08 | 138.08 (2) | ||||||||
Composition | H | H | ||||||||||||
Proper motion (right ascension) | [mas/yr] | -68.87810545 (0.1) | -68.41725335 (0.2) | -68.878 (0.1) | ||||||||||
Proper motion (declination) | [mas/yr] | -75.68425453 (0.08) | -75.61491011 (0.1) | -75.684 (0.09) | ||||||||||
Variability | ||||||||||||||
Magnetic | ||||||||||||||
Bd | [MG] | |||||||||||||
Infrared excess (disk) | ||||||||||||||
Binarity | ||||||||||||||
B magnitude | ||||||||||||||
V magnitude | 17.50 | |||||||||||||
R magnitude | ||||||||||||||
I magnitude | ||||||||||||||
J magnitude | ||||||||||||||
H magnitude | ||||||||||||||
K magnitude | ||||||||||||||
u magnitude | 17.94 (0.01) | 17.94 (0.01) | 17.94 (0.01) | 17.94 (0.01) | ||||||||||
g magnitude | 17.59 (0.006) | 17.59 (0.006) | 17.62 (0.02) | 17.59 (0.006) | ||||||||||
r magnitude | 17.84 (0.006) | 17.84 (0.006) | 17.85 (0.02) | 17.84 (0.006) | ||||||||||
i magnitude | 18.05 (0.009) | 18.05 (0.009) | 18.06 (0.02) | 18.05 (0.009) | ||||||||||
z magnitude | 18.32 (0.02) | 18.32 (0.02) | 18.33 (0.03) | 18.32 (0.02) | ||||||||||
G magnitude | 17.72 (0.01) | 17.75 | 17.72 | 17.72 (0.003) | ||||||||||
BP magnitude | 17.71 (0.01) | 17.71 | ||||||||||||
RP magnitude | 17.78 (0.02) | 17.77 | ||||||||||||
Pan g magnitude | 17.63 (0.006) | |||||||||||||
Pan r magnitude | 17.84 (0.005) | |||||||||||||
Pan i magnitude | 18.09 (0.004) | |||||||||||||
Pan z magnitude | 18.32 (0.01) | |||||||||||||
Pan y magnitude | 18.40 (0.03) | |||||||||||||
E(B-V) | 0.006 |
* Constant surface field
Spectra without link are available upon request
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.