All names: WDJ210428.02-031344.84, SDSS J210427.95-031345.9, J2104-0313, GALEX J210428.0-031345, Gaia DR3 6915911134936982784, WDJ210428.02-031344.83, Gaia DR2 6915911134936982784, SDSS J210427.96-031346.0, Gaia EDR3 6915911134936982784
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Kilic et al. 2020 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 21 04 27.92 (0.04) | 21 04 27.93 | 21 04 27.92 | 21 04 28.02 (0.04) | 21 04 27.93 | |||||
| Declination | -03 13 46.60 (0.04) | -03 13 46.55 | -03 13 46.60 | -03 13 44.84 (0.04) | -03 13 46.55 | |||||
| Spectral type | DA | DA | DA | DA | ||||||
| Effective temperature | [K] | 20301.0 (272) | 20299.0 (272) | 20695.0 (323) | ||||||
| log(g) | [cgs] | 7.98 (0.01) | 7.99 (0.01) | 8.00 (0.01) | ||||||
| Mass | [M☉] | 0.614 (0.01) | 0.62 (0.01) | 0.626 (0.01) | ||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | |||||||||
| 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] | 10.01 (0.06) | 10.09 (0.09) | 10.01 | 10.01 (0.06) | 10.09 (0.09) | ||||
| Distance | [pc] | 99.87 (0.6) | 99.06 (0.9) | 99.87 | 99.87 (0.6) | 99.06 (0.9) | ||||
| Composition | H | |||||||||
| Proper motion (right ascension) | [mas/yr] | -90.83874723 (0.06) | -90.49298322 (0.1) | -90.839 (0.06) | -90.49298322 | |||||
| Proper motion (declination) | [mas/yr] | -110.2478063 (0.04) | -110.4302737 (0.1) | -110.248 (0.04) | -110.4302737 | |||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | ||||||||||
| B magnitude | ||||||||||
| V magnitude | ||||||||||
| R magnitude | ||||||||||
| I magnitude | ||||||||||
| J magnitude | ||||||||||
| H magnitude | ||||||||||
| K magnitude | ||||||||||
| u magnitude | 15.56 (0.006) | 15.56 (0.006) | ||||||||
| g magnitude | 15.53 (0.004) | 15.53 (0.004) | ||||||||
| r magnitude | 15.90 (0.005) | 15.90 (0.005) | ||||||||
| i magnitude | 16.21 (0.005) | 16.21 (0.005) | ||||||||
| z magnitude | 16.50 (0.009) | 16.50 (0.009) | ||||||||
| G magnitude | 15.73 (0.002) | 15.75 | 15.73 | 15.73 (0.003) | 15.75 | |||||
| BP magnitude | 15.65 (0.002) | 15.61 | 15.61 | |||||||
| RP magnitude | 15.91 (0.003) | 15.92 | 15.92 | |||||||
| Pan g magnitude | 15.59 (0.003) | |||||||||
| Pan r magnitude | 15.92 (0.002) | |||||||||
| Pan i magnitude | 16.24 (0.002) | |||||||||
| Pan z magnitude | 16.50 (0.004) | |||||||||
| Pan y magnitude | 16.65 (0.009) | |||||||||
| E(B-V) | 0.006 | |||||||||
* 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.