All names: Gaia DR2 925185708460455936, Gaia EDR3 925185708460455936, SDSS J074204.78+434835.7, SDSS J074204.75+434835.5, J0742+4348, WD 0738+439, GALEX J074204.7+434836, SDSS J074204.79+434835.7, Gaia DR3 925185708460455936
Parameter | Unit | Gaia EDR3 | SDSS DR12 | Coutu et al. 2019 | Gaia DR2 | Stilism | Koester et al. 2006 | Vincent et al. 2024 | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Right ascension | 07 42 04.72 (0.1) | 07 42 04.78 | 07 42 04.78 | 07 42 04.72 (0.2) | 07 42 04.72 | 07 42 04.80 (0.1) | 07 42 04.90 | 07 42 04.79 | ||||
Declination | 43 48 35.44 (0.1) | 43 48 35.77 | 43 48 35.77 | 43 48 35.45 (0.1) | 43 48 35.44 | 43 48 35.86 (0.1) | 43 48 31.32 | 43 48 35.73 | ||||
Spectral type | DQ | DQ | DQ | DQ | DQ6.5 | DQ | DQ | |||||
Effective temperature | [K] | 8042.0 (208) | 7738.0 | 8667.0 (138) | 10098.0 (32) | |||||||
log(g) | [cgs] | 7.95 | 8.00 (0) | 8.11 (0.04) | 9.52 (0.4) | |||||||
Mass | [M☉] | 0.5456 | 0.645 (0.03) | |||||||||
log(Luminosity) | [L☉] | |||||||||||
Cooling age | [Gyr] | 1.0300 | ||||||||||
log(H/He) | ||||||||||||
log(C/He) | -5.3273 (0.1) | -5.47 (0.04) | ||||||||||
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] | 7.40 (0.2) | 7.16 | 7.16 (0.2) | 7.40 | 7.40 (0.2) | ||||||
Distance | [pc] | 135.22 (3) | 139.59 (4) | 139.59 (4) | 135.22 | 135.22 (3) | ||||||
Composition | He | He | ||||||||||
Proper motion (right ascension) | [mas/yr] | -52.53975317 (0.2) | -52.1473048 (0.4) | -52.54 (0.2) | ||||||||
Proper motion (declination) | [mas/yr] | -26.44553507 (0.1) | -26.49950192 (0.3) | -26.446 (0.1) | ||||||||
Variability | ||||||||||||
Magnetic | ||||||||||||
Bd | [MG] | |||||||||||
Infrared excess (disk) | ||||||||||||
Binarity | ||||||||||||
B magnitude | ||||||||||||
V magnitude | ||||||||||||
R magnitude | ||||||||||||
I magnitude | ||||||||||||
J magnitude | ||||||||||||
H magnitude | ||||||||||||
K magnitude | ||||||||||||
u magnitude | 19.01 (0.02) | 19.01 (0.02) | 19.02 (0.03) | |||||||||
g magnitude | 18.84 (0.009) | 18.84 (0.009) | 18.81 (0.02) | |||||||||
r magnitude | 18.73 (0.01) | 18.73 (0.01) | 18.73 (0.02) | |||||||||
i magnitude | 18.85 (0.01) | 18.84 (0.01) | 18.82 (0.02) | |||||||||
z magnitude | 19.02 (0.05) | 19.02 (0.05) | 19.01 (0.05) | |||||||||
G magnitude | 18.71 (0.03) | 18.75 | 18.71 | 18.71 (0.003) | ||||||||
BP magnitude | 18.75 (0.03) | 18.70 | ||||||||||
RP magnitude | 18.45 (0.03) | 18.36 | ||||||||||
Pan g magnitude | ||||||||||||
Pan r magnitude | ||||||||||||
Pan i magnitude | ||||||||||||
Pan z magnitude | ||||||||||||
Pan y magnitude | ||||||||||||
E(B-V) | 0.005 |
* 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.