All names: SDSS J183942.20+190713.8, Gaia EDR3 4524548038306519552, Gaia DR3 4524547836450035328, Gaia DR2 4524547836450035328, GALEX J183942.1+190714, TIC 346053003, SDSSJ183942.20+190713.8, 2MASS J18394222+1907137
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 18 39 43.39 (0.4) | 18 39 42.20 | 18 39 42.20 (0.02) | ||
| Declination | 19 08 23.18 (0.6) | 19 07 13.88 | 19 07 13.89 (0.03) | ||
| Spectral type | sd | sd | |||
| Effective temperature | [K] | ||||
| log(g) | [cgs] | ||||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 1.69 (0.8) | 0.38 (0.05) | 0.36 (0.04) | |
| Distance | [pc] | 590.04 (266) | 2632.96 (360) | 2739.73 (278) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -4.313 (0.6) | -1.317 (0.08) | -1.238 (0.03) | |
| Proper motion (declination) | [mas/yr] | -8.041 (0.9) | -6.226 (0.1) | -6.171 (0.04) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | |||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 15.87 (0.07) | 15.87 (0.07) | |||
| H magnitude | 15.85 (0.1) | 15.85 (0.1) | |||
| K magnitude | 15.70 (0.2) | 15.70 (0.2) | |||
| u magnitude | 15.81 (0.005) | 15.82 (0.02) | |||
| g magnitude | 15.66 (0.003) | 15.69 (0.009) | |||
| r magnitude | 15.89 (0.003) | 15.93 (0.01) | |||
| i magnitude | 16.08 (0.004) | 16.09 (0.005) | |||
| z magnitude | 16.27 (0.007) | 16.27 (0.02) | |||
| G magnitude | 20.56 (0.006) | 15.79 (0.0004) | 15.76 (0.003) | ||
| BP magnitude | 21.08 (0.1) | 15.72 (0.003) | |||
| RP magnitude | 20.10 (0.08) | 15.77 (0.002) | |||
| Pan g magnitude | 15.72 (0.001) | ||||
| Pan r magnitude | 15.91 (0.002) | ||||
| Pan i magnitude | 16.12 (0.002) | ||||
| Pan z magnitude | 16.29 (0.003) | ||||
| Pan y magnitude | 16.39 (0.005) | ||||
| E(B-V) | 0.191 | ||||
* 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.