All names: SDSS J082022.02+431411.1, [HHD2009] SDSS J0820+4314, SDSS J082022.04+431410.8, Gaia DR3 916277400827964544, SDSS J082022.02+431411.0, LAMOST J082022.02+431411.0, SDSS J082022.04+431410.7, SDSS J082022.03+431410.7, Gaia EDR3 916277400827964544, GALEX J082022.0+431411, WIRED J082022.02+431411.0, WD 0816+433, 2MASS J08202203+4314112, SDSS J082022.03+431411.1, [SGR2010] J0820+4314, Gaia DR2 916277400827964544, TIC 22704782
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Guo et al. 2015 | Tremblay et al. 2011 | Vincent et al. 2024 | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 20 22.05 (0.04) | 08 20 22.04 | 08 20 22.05 (0.05) | 08 20 22.02 | 08 20 22.05 | 08 20 22.03 (0.04) | 08 20 22.02 | 08 20 21.55 | 08 20 22.02 | ||||||
| Declination | 43 14 10.37 (0.03) | 43 14 10.78 | 43 14 10.40 (0.04) | 43 14 11.00 | 43 14 10.37 | 43 14 11.13 (0.03) | 43 14 11.18 | 43 14 06.00 | 43 14 11.09 | ||||||
| Spectral type | DA+M | DA+M? | DA | DA | DA+M | DA+M | DA dM | DA+M | DA+MS | ||||||
| Effective temperature | [K] | 20568.0 (85) | 21950.0 (220) | 21502.0 (83) | 21185.0 (107) | ||||||||||
| log(g) | [cgs] | 7.79 (0.03) | 7.83 (0.03) | 7.62 (0.01) | 7.62 (0.02) | ||||||||||
| Mass | [M☉] | 0.515 (0.01) | 0.54 (0.02) | ||||||||||||
| log(Luminosity) | [L☉] | ||||||||||||||
| Cooling age | [Gyr] | 0.0316 | |||||||||||||
| 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] | 8.04 (0.05) | 7.96 (0.07) | 8.04 | 8.04 (0.05) | ||||||||||
| Distance | [pc] | 124.43 (0.8) | 125.56 (1) | 861.00 (188) | 124.43 | 124.43 (0.8) | |||||||||
| Composition | H | ||||||||||||||
| Proper motion (right ascension) | [mas/yr] | 11.82111871 (0.05) | 11.59902196 (0.1) | 11.821 (0.05) | 3.0 | ||||||||||
| Proper motion (declination) | [mas/yr] | -47.25676061 (0.04) | -47.47506544 (0.07) | -47.257 (0.04) | -51.4 | ||||||||||
| Variability | |||||||||||||||
| Magnetic | |||||||||||||||
| Bd | [MG] | ||||||||||||||
| Infrared excess (disk) | |||||||||||||||
| Binarity | WDMS | WDMS | WDMS | WDMS | |||||||||||
| B magnitude | |||||||||||||||
| V magnitude | |||||||||||||||
| R magnitude | |||||||||||||||
| I magnitude | |||||||||||||||
| J magnitude | 14.07 (0.03) | ||||||||||||||
| H magnitude | 13.53 (0.03) | ||||||||||||||
| K magnitude | 13.23 (0.03) | ||||||||||||||
| u magnitude | 15.93 (0.006) | 15.92 | 15.90 (0.005) | 15.92 (0.01) | 15.92 | 15.93 (0.01) | |||||||||
| g magnitude | 15.87 (0.004) | 15.85 | 15.84 (0.003) | 15.85 (0.02) | 15.85 | 15.85 (0.02) | |||||||||
| r magnitude | 16.09 (0.005) | 16.11 | 16.09 (0.003) | 16.11 (0.01) | 16.11 | 16.10 (0.01) | |||||||||
| i magnitude | 15.83 (0.005) | 15.83 | 15.82 (0.004) | 15.83 (0.02) | 15.83 | 15.82 (0.02) | |||||||||
| z magnitude | 15.38 (0.006) | 15.38 | 15.36 (0.005) | 15.38 (0.02) | 15.38 | 15.38 (0.02) | |||||||||
| G magnitude | 15.80 (0.002) | 15.81 | 15.80 | 15.80 (0.003) | |||||||||||
| BP magnitude | 15.94 (0.002) | 15.91 | |||||||||||||
| RP magnitude | 15.40 (0.003) | 15.41 | |||||||||||||
| Pan g magnitude | 15.90 (0.003) | ||||||||||||||
| Pan r magnitude | 16.11 (0.004) | ||||||||||||||
| Pan i magnitude | 15.84 (0.003) | ||||||||||||||
| Pan z magnitude | 15.48 (0.003) | ||||||||||||||
| Pan y magnitude | 15.26 (0.006) | ||||||||||||||
| E(B-V) | 0.005 | ||||||||||||||
* 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.