All names: GALEX J211711.7+112304, SDSS J211711.78+112304.30, Gaia EDR3 1746328342436143232, SDSS J211711.78+112304.3, Gaia DR2 1746328342436143232, Gaia DR3 1746328342436143232, SDSS J211711.78+112304.2
| Parameter | Unit | Gaia EDR3 | SDSS DR12 | Bedard et al. 2020 | Genest-Beaulieu & Bergeron 2019 (spectroscopic) | Gaia DR2 | Simbad | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|
| Right ascension | 21 17 11.79 (1) | 21 17 11.79 | 21 17 11.79 (16) | 21 17 11.79 (1) | 21 17 11.78 | |||
| Declination | 11 23 04.20 (1) | 11 23 04.28 | 11 23 04.21 (9) | 11 23 04.20 (1) | 11 23 04.29 | |||
| Spectral type | DO | DB | DB | |||||
| Effective temperature | [K] | 47965.0 (4350) | 13488.0 | 48790.0 (1039) | ||||
| log(g) | [cgs] | 7.70 (0.8) | 7.47 | 7.63 (0.3) | ||||
| Mass | [M☉] | 0.51 (0.4) | 0.339 | 0.499 (0.1) | ||||
| log(Luminosity) | [L☉] | 0.12 (0.6) | ||||||
| Cooling age | [Gyr] | 0.0019 (0.0009) | ||||||
| log(H/He) | <-6.111 | |||||||
| log(C/He) | ||||||||
| log(Ca/He) | ||||||||
| log(Ca/H) | ||||||||
| log(N/He) | ||||||||
| log(O/He) | ||||||||
| log(Na/He) | ||||||||
| log(Mg/He) | ||||||||
| log(Al/He) | ||||||||
| log(Si/He) | ||||||||
| log(P/He) | ||||||||
| log(S/He) | ||||||||
| log(Cl/He) | ||||||||
| log(Sc/He) | ||||||||
| log(Ti/He) | ||||||||
| log(V/He) | ||||||||
| log(Cr/He) | ||||||||
| log(Mn/He) | ||||||||
| log(Fe/He) | ||||||||
| log(Co/He) | ||||||||
| log(Ni/He) | ||||||||
| log(Cu/He) | ||||||||
| log(Zn/He) | ||||||||
| log(Ga/He) | ||||||||
| log(Ge/He) | ||||||||
| log(Sr/He) | ||||||||
| Parallax | [mas] | |||||||
| Distance | [pc] | |||||||
| Composition | He | |||||||
| Proper motion (right ascension) | [mas/yr] | |||||||
| Proper motion (declination) | [mas/yr] | |||||||
| Variability | ||||||||
| Magnetic | ||||||||
| Bd | [MG] | |||||||
| Infrared excess (disk) | ||||||||
| Binarity | ||||||||
| B magnitude | ||||||||
| V magnitude | ||||||||
| R magnitude | ||||||||
| I magnitude | ||||||||
| J magnitude | ||||||||
| H magnitude | ||||||||
| K magnitude | ||||||||
| u magnitude | 19.99 (0.05) | 19.98 (0.05) | 19.98 (0.05) | |||||
| g magnitude | 20.50 (0.03) | 20.52 (0.03) | 20.52 (0.03) | |||||
| r magnitude | 21.02 (0.05) | 21.06 (0.05) | 21.06 (0.05) | |||||
| i magnitude | 21.19 (0.1) | 21.22 (0.1) | 21.22 (0.1) | |||||
| z magnitude | 21.70 (0.5) | 21.52 (0.4) | ||||||
| G magnitude | 20.75 (0.08) | 20.77 | 20.75 (0.01) | |||||
| BP magnitude | 20.95 (0.08) | 20.56 | ||||||
| RP magnitude | 20.82 (0.2) | 20.34 | ||||||
| Pan g magnitude | ||||||||
| Pan r magnitude | ||||||||
| Pan i magnitude | ||||||||
| Pan z magnitude | ||||||||
| Pan y magnitude | ||||||||
| E(B-V) | ||||||||
* 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.