All names: Gaia EDR3 2734603650138728448, Gaia DR3 2734603650138728448, SDSS J222032.07+142032.5, SDSS J222032.10+142033.4, SDSS J222032.07+142032.53, Gaia DR2 2734603650138728448, GALEX J222032.1+142032, SDSS J222032.09+142032.8, SDSS J222032.08+142032.8, J2220+1420
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Coutu et al. 2019 | Gaia DR2 | Stilism | Kepler et al. 2015 | Vincent et al. 2024 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 22 20 32.07 (0.2) | 22 20 32.09 | 22 20 32.11 | 22 20 32.07 (0.3) | 22 20 32.07 | 22 20 32.11 (0.2) | |||||
| Declination | 14 20 32.18 (0.2) | 14 20 32.80 | 14 20 33.48 | 14 20 32.22 (0.2) | 14 20 32.18 | 14 20 33.47 (0.2) | |||||
| Spectral type | DQ | DQ | DQ | DQ | DQ | ||||||
| Effective temperature | [K] | 8542.0 (228) | 9265.0 (23) | 8641.0 (257) | |||||||
| log(g) | [cgs] | 8.03 | 8.00 (0) | 7.99 (0.06) | |||||||
| Mass | [M☉] | 0.5978 | 0.569 (0.05) | ||||||||
| log(Luminosity) | [L☉] | ||||||||||
| Cooling age | [Gyr] | 0.9840 | |||||||||
| log(H/He) | |||||||||||
| log(C/He) | -4.9776 (0.05) | -4.289 (0.03) | |||||||||
| 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] | 7.07 (0.2) | 7.43 | 7.43 (0.3) | 7.07 | 7.07 (0.2) | |||||
| Distance | [pc] | 141.53 (4) | 134.58 (6) | 134.58 (6) | 141.53 | 141.53 (4) | |||||
| Composition | He | He | |||||||||
| Proper motion (right ascension) | [mas/yr] | -39.381046 (0.2) | -39.37229458 (0.4) | -39.381 (0.2) | |||||||
| Proper motion (declination) | [mas/yr] | -80.61273185 (0.2) | -81.46879898 (0.4) | -80.613 (0.2) | |||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | |||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | 18.80 (0.02) | 18.79 (0.03) | 18.80 (0.02) | ||||||||
| g magnitude | 18.58 (0.008) | 18.61 (0.02) | 18.59 (0.008) | ||||||||
| r magnitude | 18.62 (0.009) | 18.61 (0.02) | 18.61 (0.009) | ||||||||
| i magnitude | 18.76 (0.01) | 18.76 (0.02) | 18.76 (0.01) | ||||||||
| z magnitude | 18.87 (0.04) | 18.87 (0.04) | 18.87 (0.04) | ||||||||
| G magnitude | 18.55 (0.02) | 18.58 | 18.55 | 18.55 (0.004) | |||||||
| BP magnitude | 18.65 (0.02) | 18.60 | |||||||||
| RP magnitude | 18.45 (0.03) | 18.43 | |||||||||
| Pan g magnitude | 18.58 (0.009) | ||||||||||
| Pan r magnitude | 18.63 (0.01) | ||||||||||
| Pan i magnitude | 18.75 (0.005) | ||||||||||
| Pan z magnitude | 18.90 (0.006) | ||||||||||
| Pan y magnitude | 18.91 (0.03) | ||||||||||
| E(B-V) | 0.013 | ||||||||||
* 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.