All names: SDSS J083934.30+233409.4, USNO-B1.0 1135-00157451, GALEX J083934.3+233410, SDSS J083934.31+233409.4, Gaia DR2 666234953295747072, WD 0836+237, Gaia EDR3 666234953295747072, Gaia DR3 666234953295747072, PG 0836+237
| Parameter | Unit | Gaia EDR3 | Gaia DR2 | Stilism | Gianninas et al. 2011 | Vincent et al. 2024 | Simbad | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 39 34.32 (0.06) | 08 39 34.32 (0.09) | 08 39 34.32 | 08 39 34.31 (0.06) | 08 39 33.31 | |||
| Declination | 23 34 09.24 (0.04) | 23 34 09.24 (0.05) | 23 34 09.24 | 23 34 09.47 (0.04) | 23 34 04.44 | |||
| Spectral type | DA | DA | DA.9 | DA | ||||
| Effective temperature | [K] | 55490.0 (1177) | 66037.0 (9261) | |||||
| log(g) | [cgs] | 7.75 (0.07) | 7.96 (2) | |||||
| Mass | [M☉] | 0.6 (0.03) | 0.708 (195) | |||||
| 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] | 2.75 (0.08) | 2.42 (0.1) | 2.75 | 2.75 (0.08) | |||
| Distance | [pc] | 363.07 (1e+01) | 413.66 (19) | 401.00 | 363.07 | 363.07 (1e+01) | ||
| Composition | H | |||||||
| Proper motion (right ascension) | [mas/yr] | 11.41612811 (0.07) | 10.92940419 (0.2) | 11.416 (0.07) | ||||
| Proper motion (declination) | [mas/yr] | -14.43959283 (0.06) | -14.24468201 (0.1) | -14.44 (0.06) | ||||
| Variability | ||||||||
| Magnetic | ||||||||
| Bd | [MG] | |||||||
| Infrared excess (disk) | ||||||||
| Binarity | ||||||||
| B magnitude | 16.40 | |||||||
| V magnitude | 15.28 | |||||||
| R magnitude | 16.90 | |||||||
| I magnitude | ||||||||
| J magnitude | ||||||||
| H magnitude | ||||||||
| K magnitude | ||||||||
| u magnitude | ||||||||
| g magnitude | ||||||||
| r magnitude | ||||||||
| i magnitude | ||||||||
| z magnitude | ||||||||
| G magnitude | 16.61 (0.004) | 16.65 | 16.61 | 16.61 (0.003) | ||||
| BP magnitude | 16.45 (0.004) | 16.37 | ||||||
| RP magnitude | 16.94 (0.007) | 16.92 | ||||||
| Pan g magnitude | ||||||||
| Pan r magnitude | ||||||||
| Pan i magnitude | ||||||||
| Pan z magnitude | ||||||||
| Pan y magnitude | ||||||||
| E(B-V) | 0.022 | |||||||
* 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.