All names: Gaia DR3 6693472717093585664, Gaia EDR3 6693472717093585664, GALEX J202016.1-371642, Gaia DR2 6693472717093585664, WD 2017-374, MCT 2017-3726, USNO-B1.0 0527-00997731, EC 20170-3726
| Parameter | Unit | Gaia EDR3 | Bergeron et al. 2021 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|
| Right ascension | 20 20 16.23 (0.06) | 20 20 16.24 (0.09) | 20 20 16.23 | 20 20 16.28 (0.06) | 20 20 15.74 | |||
| Declination | -37 16 42.42 (0.05) | -37 16 42.41 (0.07) | -37 16 42.42 | -37 16 42.22 (0.05) | -37 16 35.76 | |||
| Spectral type | DA | DA | DA | DA | ||||
| Effective temperature | [K] | 19944.0 (650) | 22490.0 (740) | |||||
| log(g) | [cgs] | 7.78 (0.1) | 8.01 (0.03) | |||||
| Mass | [M☉] | 0.508 (0.05) | 0.634 (0.03) | |||||
| log(Luminosity) | [L☉] | |||||||
| Cooling age | [Gyr] | 0.0400 | ||||||
| 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] | 5.60 (0.09) | 5.45 (0.1) | 5.60 | 5.60 (0.09) | |||
| Distance | [pc] | 178.49 (3) | 178.00 | 183.60 (4) | 178.49 | 178.49 (3) | ||
| Composition | H | |||||||
| Proper motion (right ascension) | [mas/yr] | -33.91844218 (0.08) | -34.03861231 (0.2) | -33.918 (0.08) | ||||
| Proper motion (declination) | [mas/yr] | -12.22573036 (0.06) | -12.14768449 (0.1) | -12.226 (0.06) | ||||
| Variability | ||||||||
| Magnetic | ||||||||
| Bd | [MG] | |||||||
| Infrared excess (disk) | ||||||||
| Binarity | ||||||||
| B magnitude | 16.83 | |||||||
| V magnitude | 16.91 | |||||||
| R magnitude | 16.80 | |||||||
| I magnitude | ||||||||
| J magnitude | ||||||||
| H magnitude | ||||||||
| K magnitude | ||||||||
| u magnitude | ||||||||
| g magnitude | ||||||||
| r magnitude | ||||||||
| i magnitude | ||||||||
| z magnitude | ||||||||
| G magnitude | 16.88 (0.007) | 16.90 | 16.88 | 16.88 (0.003) | ||||
| BP magnitude | 16.79 (0.007) | 16.74 | ||||||
| RP magnitude | 17.06 (0.008) | 17.04 | ||||||
| Pan g magnitude | ||||||||
| Pan r magnitude | ||||||||
| Pan i magnitude | ||||||||
| Pan z magnitude | ||||||||
| Pan y magnitude | ||||||||
| E(B-V) | 0.016 | |||||||
* 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.