All names: Gaia DR2 912919969057634432, Gaia DR3 912919969057634432, SDSS J084925.35+415845.6, GALEX J084925.4+415846, Gaia EDR3 912919969057634432, SDSS J084925.35+415845.70, WD 0846+421, SDSS J084925.35+415845.7, SDSS J084925.36+415845.7
| Parameter | Unit | Gaia EDR3 | SDSS DR12 | Genest-Beaulieu & Bergeron 2019 (spectroscopic) | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 49 25.38 (0.7) | 08 49 25.36 | 08 49 25.38 (0.9) | 08 49 25.35 (0.7) | 08 49 25.35 | 08 49 25.58 | 08 49 25.35 | ||||
| Declination | 41 58 45.54 (0.4) | 41 58 45.71 | 41 58 45.55 (0.6) | 41 58 45.66 (0.4) | 41 58 45.67 | 41 58 38.28 | 41 58 45.69 | ||||
| Spectral type | DB | DB | DB | DB | DB | ||||||
| Effective temperature | [K] | 15095.0 | 15755.0 (424) | 15780.0 (489) | |||||||
| log(g) | [cgs] | 7.23 | 7.73 (0.3) | 7.65 (0.3) | |||||||
| Mass | [M☉] | 0.274 | 0.417 (0.1) | ||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | -5.034 | ||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| Parallax | [mas] | 1.00 (0.8) | -0.07 (1) | 1.00 (0.8) | |||||||
| Distance | [pc] | 999.36 (786) | 999.40 (787) | ||||||||
| Composition | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 17.64263658 (0.8) | 16.09715357 (2) | 17.643 (0.8) | 20.4 | ||||||
| Proper motion (declination) | [mas/yr] | -7.191329893 (0.6) | -7.827010471 (1) | -7.191 (0.6) | -11.2 | ||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | |||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | 20.16 (0.04) | 20.16 (0.04) | 20.11 (0.04) | 20.11 | 20.13 (0.05) | ||||||
| g magnitude | 20.21 (0.02) | 20.20 (0.02) | 20.23 (0.03) | 20.23 | 20.23 (0.03) | ||||||
| r magnitude | 20.46 (0.03) | 20.39 (0.03) | 20.43 (0.03) | 20.44 (0.03) | |||||||
| i magnitude | 20.74 (0.05) | 20.74 (0.05) | 20.71 (0.06) | 20.73 (0.06) | |||||||
| z magnitude | 20.41 (0.1) | 20.95 (0.2) | 21.03 (0.3) | 21.03 (0.3) | |||||||
| G magnitude | 20.36 (0.07) | 20.41 | 20.36 (0.006) | ||||||||
| BP magnitude | 20.38 (0.07) | 20.29 | |||||||||
| RP magnitude | 20.25 (0.1) | 20.38 | |||||||||
| Pan g magnitude | |||||||||||
| Pan r magnitude | |||||||||||
| Pan i magnitude | |||||||||||
| Pan z magnitude | |||||||||||
| Pan y magnitude | |||||||||||
| E(B-V) | 0.027 | ||||||||||
* 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.