All names: KUV 08172+3838, WD 0817+386, SDSS J082032.33+382848.0, Gaia DR2 908175305800794752, FBS B 53, FBS 0817+386, Gaia DR3 908175305800794752, TIC 18805280, PG 0817+386, 2MASS J08203237+3828480, SDSS J082032.33+382848.1, KUV 344-17, Gaia EDR3 908175305800794752, LAMOST J082032.28+382847.4, SDSS J082032.27+382847.4, GALEX J082032.2+382846
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | Gianninas et al. 2011 | Liebert et al. 2005 | Vincent et al. 2024 | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 20 32.24 (0.05) | 08 20 32.34 | 08 20 32.25 (0.06) | 08 20 32.24 | 08 20 32.35 (0.05) | 08 20 31.51 | 08 20 32.33 | ||||||
| Declination | 38 28 47.04 (0.04) | 38 28 48.02 | 38 28 47.07 (0.04) | 38 28 47.04 | 38 28 48.20 (0.04) | 38 28 47.28 | 38 28 48.07 | ||||||
| Spectral type | DA | DA | DA1.9 | DA2 | DA | DA | |||||||
| Effective temperature | [K] | 26070.0 (399) | 25230.0 (384) | 27776.0 (602) | 26823.0 (71) | ||||||||
| log(g) | [cgs] | 8.03 (0.05) | 7.97 (0.05) | 8.11 (0.02) | 7.96 (0.01) | ||||||||
| Mass | [M☉] | 0.66 (0.03) | 0.62 (0.03) | 0.701 (0.02) | 0.617 (0.004) | ||||||||
| log(Luminosity) | [L☉] | -1.17 | |||||||||||
| Cooling age | [Gyr] | 0.0282 | |||||||||||
| 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] | 8.17 (0.06) | 8.06 (0.08) | 8.17 | 8.17 (0.06) | 25.20 (2) | |||||||
| Distance | [pc] | 122.47 (0.8) | 124.01 (1) | 130.00 | 122.00 | 122.47 | 122.47 (0.8) | 39.68 (3) | |||||
| Composition | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -80.37921555 (0.05) | -80.53255067 (0.1) | -80.379 (0.05) | |||||||||
| Proper motion (declination) | [mas/yr] | -72.43294431 (0.04) | -72.48338827 (0.08) | -72.433 (0.04) | |||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | 15.72 | ||||||||||||
| V magnitude | 15.69 | 15.69 | |||||||||||
| R magnitude | |||||||||||||
| I magnitude | |||||||||||||
| J magnitude | 16.24 (0.1) | ||||||||||||
| H magnitude | |||||||||||||
| K magnitude | |||||||||||||
| u magnitude | 15.38 (0.004) | 15.38 (0.004) | 15.39 (0.01) | ||||||||||
| g magnitude | 15.50 (0.004) | 15.51 (0.004) | 15.52 (0.02) | ||||||||||
| r magnitude | 15.96 (0.004) | 15.96 (0.004) | 15.97 (0.02) | ||||||||||
| i magnitude | 16.28 (0.005) | 16.28 (0.005) | 16.28 (0.02) | ||||||||||
| z magnitude | 16.62 (0.009) | 16.61 (0.009) | 16.62 (0.02) | ||||||||||
| G magnitude | 15.74 (0.003) | 15.76 | 15.74 | 15.74 (0.003) | |||||||||
| BP magnitude | 15.63 (0.003) | 15.56 | |||||||||||
| RP magnitude | 16.00 (0.004) | 15.98 | |||||||||||
| Pan g magnitude | 15.56 (0.003) | ||||||||||||
| Pan r magnitude | 15.96 (0.003) | ||||||||||||
| Pan i magnitude | 16.31 (0.003) | ||||||||||||
| Pan z magnitude | 16.57 (0.006) | ||||||||||||
| Pan y magnitude | 16.78 (0.007) | ||||||||||||
| 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.