All names: Gaia DR2 2642849748398353152, GALEX J233931.3-000156, Gaia EDR3 2642849748398353152, SDSS J233931.34-000156.40, 2SLAQ J233931.34-000156.3, Gaia DR3 2642849748398353152, SDSS J233931.34-000156.4, SDSS J233931.34-000156.3
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Genest-Beaulieu & Bergeron 2019 (spectroscopic) | Genest-Beaulieu & Bergeron 2019 (photometric) | Gaia DR2 | Stilism | Simbad | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 23 39 31.35 (1) | 23 39 31.34 | 23 39 31.35 (1) | 23 39 31.34 (1) | 23 39 31.34 | ||||||
| Declination | -00 01 56.65 (0.7) | -00 01 56.40 | -00 01 56.64 (1) | -00 01 56.42 (0.7) | -00 01 56.38 | ||||||
| Spectral type | DB | DB | DB | ||||||||
| Effective temperature | [K] | 16607.0 | 14198.0 | 13711.0 (753) | |||||||
| log(g) | [cgs] | 9.39 | 6.06 | 7.96 (0.5) | |||||||
| Mass | [M☉] | 1.32 | 0.075 | 0.557 (0.3) | |||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | ||||||||||
| log(H/He) | <-5.624 | ||||||||||
| log(C/He) | |||||||||||
| log(Ca/He) | |||||||||||
| log(Ca/H) | |||||||||||
| Parallax | [mas] | 1.31 (1) | 0.44 (2) | 1.31 (1) | |||||||
| Distance | [pc] | 766.11 (684) | 2289.48 (9250) | 766.11 (684) | |||||||
| Composition | |||||||||||
| Proper motion (right ascension) | [mas/yr] | 6.271222793 (2) | 8.55436918 (2) | 6.271 (2) | |||||||
| Proper motion (declination) | [mas/yr] | -14.10779077 (0.9) | -13.53518569 (2) | -14.108 (0.9) | |||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | |||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | 20.49 (0.05) | 20.55 (0.07) | 20.51 (0.07) | ||||||||
| g magnitude | 20.51 (0.02) | 20.53 (0.02) | 20.55 (0.03) | ||||||||
| r magnitude | 20.69 (0.03) | 20.73 (0.04) | 20.76 (0.03) | ||||||||
| i magnitude | 20.89 (0.05) | 20.75 (0.05) | 20.76 (0.05) | ||||||||
| z magnitude | 21.20 (0.3) | 21.09 (0.3) | 21.11 (0.3) | ||||||||
| G magnitude | 20.63 (0.1) | 20.70 | 20.63 (0.01) | ||||||||
| BP magnitude | 20.64 (0.1) | 20.80 | |||||||||
| RP magnitude | 20.72 (0.2) | 20.41 | |||||||||
| Pan g magnitude | 20.58 (0.02) | ||||||||||
| Pan r magnitude | 20.76 (0.04) | ||||||||||
| Pan i magnitude | 20.89 (0.03) | ||||||||||
| Pan z magnitude | 21.26 (0.2) | ||||||||||
| Pan y magnitude | 20.48 (0.2) | ||||||||||
| E(B-V) | 0.035 | ||||||||||
* 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.