All names: SDSS J083427.30+482116.6, Gaia DR3 1026824254093580160, SDSS J083427.31+482116.5, SDSS J083427.31+482116.6, GALEX J083427.2+482116, Gaia EDR3 1026824254093580160, Gaia DR2 1026824254093580160, WD 0830+485
| Parameter | Unit | Gaia EDR3 | SDSS DR12 | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Kleinman et al. 2004 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 34 27.32 (0.8) | 08 34 27.32 | 08 34 27.32 (0.9) | 08 34 27.31 (0.8) | 08 34 27.32 | 08 34 26.98 | 08 34 27.31 | 08 34 27.31 | |||
| Declination | 48 21 16.49 (0.6) | 48 21 16.48 | 48 21 16.50 (0.7) | 48 21 16.69 (0.6) | 48 21 16.60 | 48 21 10.80 | 48 21 16.65 | 48 21 16.63 | |||
| Spectral type | DA | DA | DA2.7 | DA | DA | ||||||
| Effective temperature | [K] | 18502.0 (516) | 18806.0 (519) | 18577.0 (520) | |||||||
| log(g) | [cgs] | 8.00 (0.1) | 8.02 (0.1) | 8.01 (0.1) | |||||||
| Mass | [M☉] | 0.63 (0.07) | |||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | |||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| Parallax | [mas] | 4.17 (0.9) | 7.65 (1) | 4.17 (0.9) | |||||||
| Distance | [pc] | 239.71 (51) | 130.73 (19) | 239.70 (51) | |||||||
| Composition | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 8.795235927 (1) | 12.49549814 (2) | 8.795 (1) | 8.8 | 8.0 | |||||
| Proper motion (declination) | [mas/yr] | -12.31120661 (0.8) | -16.66582494 (1) | -12.311 (0.8) | 0.1 | 2.0 | |||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | |||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | 20.05 (0.04) | 20.05 (0.04) | 20.05 (0.04) | 20.05 | 20.04 (0.04) | 20.05 (0.04) | |||||
| g magnitude | 19.91 (0.02) | 19.88 (0.02) | 19.90 (0.02) | 19.90 | 19.90 (0.02) | 19.90 (0.02) | |||||
| r magnitude | 20.15 (0.02) | 20.17 (0.03) | 20.19 (0.03) | 20.20 | 20.18 (0.03) | 20.20 (0.03) | |||||
| i magnitude | 20.39 (0.04) | 20.41 (0.05) | 20.43 (0.04) | 20.43 | 20.43 (0.05) | 20.43 (0.05) | |||||
| z magnitude | 21.36 (0.3) | 20.43 (0.1) | 20.44 (0.1) | 20.44 | 20.44 (0.1) | 20.44 (0.1) | |||||
| G magnitude | 20.30 (0.04) | 20.23 | 20.30 (0.01) | ||||||||
| BP magnitude | 20.13 (0.04) | 20.15 | |||||||||
| RP magnitude | 20.29 (0.1) | 20.24 | |||||||||
| Pan g magnitude | |||||||||||
| Pan r magnitude | |||||||||||
| Pan i magnitude | |||||||||||
| Pan z magnitude | |||||||||||
| Pan y magnitude | |||||||||||
| E(B-V) | 0.012 | ||||||||||
* 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.