All names: Gaia DR2 707927948887371392, SDSS J082835.82+293448.7, GALEX J082835.8+293448, SDSS J082835.81+293448.6, Gaia DR3 707927953183963008, Gaia EDR3 707927953183963008, WD 0825+297
| Parameter | Unit | Gaia EDR3 | SDSS DR12 | Hardy et al. 2023a | Gaia DR2 | Stilism | Ferrario et al. 2015 | Kulebi et al. 2009 | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 28 35.79 (0.4) | 08 28 35.81 | 08 28 35.79 (0.5) | 08 28 35.82 | 08 28 35.83 (0.4) | 08 28 35.23 | 08 28 35.82 | |||||
| Declination | 29 34 48.38 (0.3) | 29 34 48.69 | 29 34 48.39 (0.3) | 29 34 48.68 | 29 34 48.75 (0.3) | 29 34 42.24 | 29 34 48.69 | |||||
| Spectral type | DAH | DA | DAH | DAP | DAP2.6 | DAH | DAH: | |||||
| Effective temperature | [K] | 23855.4 (1394) | 19500.0 | 13176.0 (327) | ||||||||
| log(g) | [cgs] | 8.91 (0.1) | 8.00 (0) | 9.88 (0.1) | ||||||||
| Mass | [M☉] | 1.1633872817230817 (0.2) | ||||||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | |||||||||||
| 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] | 2.71 (0.5) | 2.81 (0.7) | 2.71 (0.5) | ||||||||
| Distance | [pc] | 368.46 (63) | 356.37 (91) | 368.46 (63) | ||||||||
| Composition | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -31.08494231 (0.5) | -32.70164468 (1) | -31.085 (0.5) | ||||||||
| Proper motion (declination) | [mas/yr] | -23.00888454 (0.4) | -22.90218998 (0.7) | -23.009 (0.4) | ||||||||
| Variability | ||||||||||||
| Magnetic | yes | yes | yes | yes | ||||||||
| Bd | [MG] | 35.30001095456255 | 33.4 (11) | 33.4 (11) | ||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | ||||||||||||
| H magnitude | ||||||||||||
| K magnitude | ||||||||||||
| u magnitude | 19.71 (0.04) | 19.71 (0.04) | 19.67 | 19.68 (0.04) | ||||||||
| g magnitude | 19.74 (0.02) | 19.74 (0.02) | 19.74 | 19.74 (0.03) | ||||||||
| r magnitude | 20.14 (0.02) | 20.14 (0.02) | 20.05 | 20.04 (0.03) | ||||||||
| i magnitude | 20.39 (0.04) | 20.39 (0.04) | 20.32 | 20.30 (0.04) | ||||||||
| z magnitude | 21.45 (0.4) | 21.45 (0.4) | 20.31 | 20.30 (0.1) | ||||||||
| G magnitude | 19.94 (0.05) | 19.99 | 19.94 (0.005) | |||||||||
| BP magnitude | 19.93 (0.05) | 19.92 | ||||||||||
| RP magnitude | 19.95 (0.1) | 20.00 | ||||||||||
| Pan g magnitude | ||||||||||||
| Pan r magnitude | ||||||||||||
| Pan i magnitude | ||||||||||||
| Pan z magnitude | ||||||||||||
| Pan y magnitude | ||||||||||||
| E(B-V) | 0.020 | |||||||||||
* 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.