All names: WD 0437+138, WDJ044023.88+135845.88, WISE J044023.93+135845.7, Gaia DR2 3308403897837092992, LP 475-242, UCAC4 520-008627, KUV 04376+1353, Gaia DR3 3308403897837092992, GALEX J044023.9+135846, Cl* Melotte 25 REID 400, Gaia EDR3 3308403897837092992, LAMOST J044023.94+135845.6, 2MASS J04402386+1358460, WISEA J044023.94+135845.5, EGGR 316, TIC 245941959, WD 0437+13
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Gaia DR2 | Stilism | Bergeron et al. 2011 | Wegner et al. 1987 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 04 40 23.98 (0.03) | 04 40 23.98 (0.05) | 04 40 23.98 | 04 40 23.88 (0.03) | 04 40 23.98 | 04 40 25.30 | |||||
| Declination | 13 58 45.55 (0.01) | 13 58 45.56 (0.03) | 13 58 45.55 | 13 58 45.88 (0.01) | 13 58 45.56 | 13 58 46.92 | |||||
| Spectral type | DBA | DB | DB4 | DB4 | |||||||
| Effective temperature | [K] | 15120.0 (362) | 18000.0 | 14938.0 (106) | |||||||
| log(g) | [cgs] | 8.25 (0.09) | 8.22 (0.008) | ||||||||
| Mass | [M☉] | 0.74 (0.06) | 0.725 (0.007) | ||||||||
| log(Luminosity) | [L☉] | -2.27 | |||||||||
| Cooling age | [Gyr] | 0.2951 | |||||||||
| log(H/He) | -4.68 (0.06) | -4.3 | |||||||||
| 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] | 21.76 (0.03) | 21.73 (0.06) | 21.76 | 21.76 (0.03) | 21.73 (0.06) | 23.00 (5) | ||||
| Distance | [pc] | 45.96 (0.07) | 46.01 (0.1) | 45.00 | 45.96 | 45.96 (0.07) | 46.01 (0.1) | 43.48 (9) | |||
| Composition | He | ||||||||||
| Proper motion (right ascension) | [mas/yr] | 95.28566036 (0.04) | 95.27612981 (0.1) | 95.286 (0.04) | 95.27612981 | ||||||
| Proper motion (declination) | [mas/yr] | -20.83531065 (0.03) | -20.68711378 (0.05) | -20.835 (0.03) | -20.68711378 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | 14.97 (0.07) | ||||||||||
| V magnitude | 14.92 | 14.94 (0.01) | |||||||||
| R magnitude | 13.25 (0.9) | ||||||||||
| I magnitude | |||||||||||
| J magnitude | 15.32 (0.05) | ||||||||||
| H magnitude | 15.51 (0.1) | ||||||||||
| K magnitude | 15.31 (0.2) | ||||||||||
| u magnitude | |||||||||||
| g magnitude | 14.84 (0.04) | ||||||||||
| r magnitude | 15.08 (0.03) | ||||||||||
| i magnitude | 15.37 (0.06) | ||||||||||
| z magnitude | |||||||||||
| G magnitude | 14.91 (0.002) | 14.93 | 14.91 | 14.91 (0.003) | 14.93 | ||||||
| BP magnitude | 14.85 (0.002) | 14.81 | 14.81 | ||||||||
| RP magnitude | 15.01 (0.001) | 15.01 | 15.01 | ||||||||
| Pan g magnitude | 14.84 (0.001) | ||||||||||
| Pan r magnitude | 15.09 (0.002) | ||||||||||
| Pan i magnitude | 15.34 (0.006) | ||||||||||
| Pan z magnitude | 15.57 (0.003) | ||||||||||
| Pan y magnitude | 15.72 (0.005) | ||||||||||
| E(B-V) | 0.001 | ||||||||||
* 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.