All names: SDSS J220739.80+180929.6, Gaia DR3 1776246706661229696, SDSS J220739.79+180929.6, Gaia DR2 1776246706661229696, GALEX J220739.8+180929, SDSS J220739.80+180929.7, Gaia EDR3 1776246706661229696
| Parameter | Unit | Gaia EDR3 | Stilism | Vincent et al. 2024 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|
| Right ascension | 22 07 39.81 (0.2) | 22 07 39.81 | 22 07 39.76 (0.2) | |||
| Declination | 18 09 29.90 (0.3) | 18 09 29.90 | 18 09 29.22 (0.3) | |||
| Spectral type | DA | DA | DA | |||
| Effective temperature | [K] | 7011.0 (266) | ||||
| log(g) | [cgs] | 8.10 (0.08) | ||||
| Mass | [M☉] | 0.653 (0.07) | ||||
| log(Luminosity) | [L☉] | |||||
| Cooling age | [Gyr] | |||||
| log(H/He) | ||||||
| log(C/He) | ||||||
| log(Ca/He) | ||||||
| log(Ca/H) | ||||||
| Parallax | [mas] | 8.48 (0.3) | 8.48 | 8.48 (0.3) | ||
| Distance | [pc] | 117.93 (4) | 117.93 | 117.93 (4) | ||
| Composition | ||||||
| Proper motion (right ascension) | [mas/yr] | 46.649 (0.3) | 46.649 (0.3) | |||
| Proper motion (declination) | [mas/yr] | 43.096 (0.3) | 43.096 (0.3) | |||
| Variability | ||||||
| Magnetic | ||||||
| Bd | [MG] | |||||
| Infrared excess (disk) | ||||||
| Binarity | ||||||
| B magnitude | ||||||
| V magnitude | ||||||
| R magnitude | ||||||
| I magnitude | ||||||
| J magnitude | ||||||
| H magnitude | ||||||
| K magnitude | ||||||
| u magnitude | 19.66 (0.04) | |||||
| g magnitude | 19.15 (0.01) | |||||
| r magnitude | 18.98 (0.01) | |||||
| i magnitude | 18.91 (0.02) | |||||
| z magnitude | 18.90 (0.06) | |||||
| G magnitude | 18.94 (0.004) | 18.94 | 18.94 (0.004) | |||
| BP magnitude | 19.13 (0.04) | |||||
| RP magnitude | 18.61 (0.04) | |||||
| Pan g magnitude | ||||||
| Pan r magnitude | ||||||
| Pan i magnitude | ||||||
| Pan z magnitude | ||||||
| Pan y magnitude | ||||||
| E(B-V) | 0.012 | |||||
* 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.