All names: MCT 0442-3523, Gaia DR2 4867104257483687040, UCAC4 274-005263, WDJ044427.35-351745.09, GALEX J044427.2-351745, 2MASS J04442739-3517450, Gaia EDR3 4867104257483687040, EC 04426-3523, TIC 1196437, Gaia DR3 4867104257483687040
| Parameter | Unit | Gaia EDR3 | Bergeron et al. 2021 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|
| Right ascension | 04 44 27.32 (0.02) | 04 44 27.32 | 04 44 27.32 | 04 44 27.35 (0.02) | 04 44 27.32 | |||
| Declination | -35 17 46.25 (0.03) | -35 17 46.21 | -35 17 46.25 | -35 17 45.09 (0.03) | -35 17 46.21 | |||
| Spectral type | DBA | DB | DBA | |||||
| Effective temperature | [K] | 13404.0 (400) | 13894.0 (130) | |||||
| log(g) | [cgs] | 7.95 (0.2) | 8.25 (0.01) | |||||
| Mass | [M☉] | 0.557 (0.1) | 0.74 (0.009) | |||||
| log(Luminosity) | [L☉] | |||||||
| Cooling age | [Gyr] | 0.2676 | ||||||
| log(H/He) | -4.8 | |||||||
| 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] | 16.92 (0.03) | 16.90 (0.04) | 16.92 | 16.92 (0.03) | 16.90 (0.04) | ||
| Distance | [pc] | 59.09 (0.1) | 59.00 | 59.16 (0.1) | 59.09 | 59.09 (0.1) | 59.16 (0.1) | |
| Composition | He | |||||||
| Proper motion (right ascension) | [mas/yr] | -26.92579208 (0.03) | -26.99041114 (0.06) | -26.926 (0.03) | -26.99041114 | |||
| Proper motion (declination) | [mas/yr] | -72.50334093 (0.03) | -72.30880214 (0.09) | -72.503 (0.04) | -72.30880214 | |||
| Variability | ||||||||
| Magnetic | ||||||||
| Bd | [MG] | |||||||
| Infrared excess (disk) | ||||||||
| Binarity | ||||||||
| B magnitude | 15.70 (0.05) | |||||||
| V magnitude | 15.73 (0.03) | |||||||
| R magnitude | 15.78 (0.3) | |||||||
| I magnitude | ||||||||
| J magnitude | 16.16 (0.1) | |||||||
| H magnitude | ||||||||
| K magnitude | ||||||||
| u magnitude | ||||||||
| g magnitude | 15.64 (0.06) | |||||||
| r magnitude | 15.80 (0.02) | |||||||
| i magnitude | 16.01 (0.01) | |||||||
| z magnitude | ||||||||
| G magnitude | 15.68 (0.002) | 15.70 | 15.68 | 15.68 (0.003) | 15.70 | |||
| BP magnitude | 15.63 (0.002) | 15.59 | 15.59 | |||||
| RP magnitude | 15.73 (0.003) | 15.73 | 15.73 | |||||
| Pan g magnitude | ||||||||
| Pan r magnitude | ||||||||
| Pan i magnitude | ||||||||
| Pan z magnitude | ||||||||
| Pan y magnitude | ||||||||
| E(B-V) | 0.000 | |||||||
* 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.