All names: SDSS J083445.55+391428.8, Gaia DR3 911129276932301312, SDSS J083445.56+391428.9, GALEX J083445.5+391429, SDSS J083445.56+391428.8, Gaia DR2 911129276932301312, Gaia EDR3 911129276932301312, WD 0831+394
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 34 45.58 (0.7) | 08 34 45.57 | 08 34 45.57 (0.7) | 08 34 45.56 | 08 34 45.70 | 08 34 45.56 | ||
| Declination | 39 14 28.75 (0.4) | 39 14 28.89 | 39 14 28.92 (0.4) | 39 14 28.89 | 39 14 27.24 | 39 14 28.89 | ||
| Spectral type | DA | DA_auto | DA | DA | ||||
| Effective temperature | [K] | 12159.0 (1508) | 11449.0 (887) | |||||
| log(g) | [cgs] | 8.28 (0.3) | 8.54 (0.3) | |||||
| Mass | [M☉] | 0.932 (0.2) | ||||||
| log(Luminosity) | [L☉] | |||||||
| Cooling age | [Gyr] | |||||||
| log(H/He) | ||||||||
| log(C/He) | ||||||||
| log(Ca/He) | ||||||||
| log(Ca/H) | ||||||||
| Parallax | [mas] | -1.07 (0.8) | ||||||
| Distance | [pc] | |||||||
| Composition | ||||||||
| Proper motion (right ascension) | [mas/yr] | 2.05114361 (0.9) | 2.051 (0.9) | 0.8 | ||||
| Proper motion (declination) | [mas/yr] | -10.36759143 (0.7) | -10.368 (0.7) | -11.6 | ||||
| Variability | ||||||||
| Magnetic | ||||||||
| Bd | [MG] | |||||||
| Infrared excess (disk) | ||||||||
| Binarity | ||||||||
| B magnitude | ||||||||
| V magnitude | ||||||||
| R magnitude | ||||||||
| I magnitude | ||||||||
| J magnitude | ||||||||
| H magnitude | ||||||||
| K magnitude | ||||||||
| u magnitude | 20.37 (0.05) | 20.40 (0.06) | 20.41 (0.06) | 20.41 | 20.42 (0.06) | |||
| g magnitude | 20.10 (0.02) | 20.11 (0.02) | 20.12 (0.03) | 20.12 | 20.12 (0.03) | |||
| r magnitude | 20.33 (0.03) | 20.27 (0.03) | 20.31 (0.03) | 20.31 | 20.32 (0.03) | |||
| i magnitude | 20.46 (0.04) | 20.42 (0.05) | 20.45 (0.04) | 20.45 | 20.46 (0.05) | |||
| z magnitude | 20.65 (0.2) | 20.68 (0.2) | 20.64 (0.2) | 20.64 | 20.67 (0.2) | |||
| G magnitude | 20.37 (0.07) | 20.37 (0.008) | ||||||
| BP magnitude | 20.32 (0.07) | |||||||
| RP magnitude | 19.92 (0.08) | |||||||
| Pan g magnitude | 20.16 (0.01) | |||||||
| Pan r magnitude | 20.31 (0.01) | |||||||
| Pan i magnitude | 20.57 (0.02) | |||||||
| Pan z magnitude | 20.65 (0.03) | |||||||
| Pan y magnitude | ||||||||
| E(B-V) | ||||||||
* 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.