All names: Gaia DR3 2737921155893258496, GALEX J222740.4+175320, WDJ222740.36+175321.36, PSO J336.9189+17.8889, NLTT 53908, J2227+1753, 22276+1753, SDSS J222740.49+175320.5, SDSS J222740.49+175320.6, LSPM J2227+1753, USNO-B1.0 1078-00735750, TIC 51695812, Gaia EDR3 2737921155893258496, PM J22276+1753, Gaia DR2 2737921155893258496, 2MASS J22274034+1753215, WD 2225+176, LP 460-27
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Hardy et al. 2023a | Caron et al. 2023 | Blouin & Xu 2022 | Kilic et al. 2020 | Blouin et al. 2019 | Gaia DR2 | Stilism | Ferrario et al. 2015 | Limoges et al. 2015 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 22 27 40.57 (0.06) | 22 27 40.57 (0.1) | 22 27 40.57 | 22 27 40.36 (0.06) | 22 27 40.57 | 22 27 40.27 | |||||||||||
| Declination | 17 53 20.01 (0.05) | 17 53 20.05 (0.09) | 17 53 20.01 | 17 53 21.36 (0.05) | 17 53 20.05 | 17 53 20.04 | |||||||||||
| Spectral type | DAZH | DAH | DAZ | DAZ | DAZ | DAZ | DAZ | DA | DAZ | DA | |||||||
| Effective temperature | [K] | 6668.0 (30) | 6548.3 (28) | 6739.0 (26) | 6607.0 (38) | 6668.0 (30) | 6550.0 (50) | 6250.0 (70) | 6750.0 (151) | 6644.0 (53) | |||||||
| log(g) | [cgs] | 7.97 (0.008) | 7.93 (0.006) | 7.97 (0.009) | 7.94 (0.02) | 7.95 (0.009) | 7.92 (0.02) | 7.87 (0.1) | 8.28 (0.2) | 7.96 (0.01) | |||||||
| Mass | [M☉] | 0.57 (0.007) | 0.5500268076558366 (0.007) | 0.555 (0.007) | 0.557 (0.009) | 0.563 (0.007) | 0.543 (0.01) | 0.77 (0.1) | 0.57 (0.01) | ||||||||
| log(Luminosity) | [L☉] | -3.68 | |||||||||||||||
| Cooling age | [Gyr] | 1.7100 | 1.6700 | 1.5850 (0.06) | |||||||||||||
| log(H/He) | |||||||||||||||||
| log(C/He) | |||||||||||||||||
| log(Ca/He) | |||||||||||||||||
| log(Ca/H) | -8.89 | -8.89 (0.08) | |||||||||||||||
| 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] | 24.18 (0.06) | 24.01 (0.1) | 24.18 (0.06) | 24.01 (0.1) | 24.01 (0.1) | 24.18 | 24.18 (0.06) | 24.01 (0.1) | ||||||||
| Distance | [pc] | 41.36 (0.1) | 41.65 (0.2) | 41.36 (0.1) | 41.65 (0.2) | 41.65 (0.2) | 30.50 (1) | 41.36 | 41.36 (0.1) | 41.65 (0.2) | |||||||
| Composition | H | H | H | H | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | 192.8779133 (0.08) | 192.97 (0.2) | 192.878 (0.08) | 192.9695925 | ||||||||||||
| Proper motion (declination) | [mas/yr] | -84.58256369 (0.07) | -84.449 (0.1) | -84.583 (0.07) | -84.4486658 | ||||||||||||
| Variability | |||||||||||||||||
| Magnetic | yes | yes | |||||||||||||||
| Bd | [MG] | 1.3003489390255505 | 0.334 (0.003) | ||||||||||||||
| Infrared excess (disk) | |||||||||||||||||
| Binarity | |||||||||||||||||
| B magnitude | 16.80 | ||||||||||||||||
| V magnitude | 15.84 | ||||||||||||||||
| R magnitude | 16.00 | ||||||||||||||||
| I magnitude | |||||||||||||||||
| J magnitude | 15.94 (0.01) | 15.85 (0.08) | 15.85 | 15.85 (0.08) | |||||||||||||
| H magnitude | 15.57 (0.1) | 15.57 (0.1) | 15.57 | 15.57 (0.1) | |||||||||||||
| K magnitude | 15.47 (0.2) | 15.47 (0.2) | 15.47 | 15.47 (0.2) | |||||||||||||
| u magnitude | 17.49 (0.01) | 17.52 (0.01) | 17.52 (0.01) | ||||||||||||||
| g magnitude | 16.89 (0.006) | 16.90 (0.004) | |||||||||||||||
| r magnitude | 16.66 (0.003) | 16.66 (0.005) | |||||||||||||||
| i magnitude | 16.62 (0.005) | 16.59 (0.005) | |||||||||||||||
| z magnitude | 16.62 (0.004) | 16.61 (0.01) | |||||||||||||||
| G magnitude | 16.64 (0.008) | 16.66 | 16.64 | 16.64 (0.003) | 16.66 | ||||||||||||
| BP magnitude | 16.87 (0.008) | 16.87 | 16.87 | ||||||||||||||
| RP magnitude | 16.28 (0.004) | 16.29 | 16.29 | ||||||||||||||
| Pan g magnitude | 16.89 (0.008) | 16.89 (0.006) | 16.89 (0.006) | 16.89 (0.006) | |||||||||||||
| Pan r magnitude | 16.66 (0.003) | 16.66 (0.003) | 16.66 (0.003) | 16.66 (0.003) | |||||||||||||
| Pan i magnitude | 16.62 (0.004) | 16.62 (0.005) | 16.62 (0.005) | 16.62 (0.005) | |||||||||||||
| Pan z magnitude | 16.62 (0.004) | 16.62 (0.004) | 16.62 (0.004) | 16.62 (0.004) | |||||||||||||
| Pan y magnitude | 16.64 (0.005) | 16.64 (0.005) | 16.64 (0.005) | 16.64 (0.005) | |||||||||||||
| E(B-V) | 0.002 | ||||||||||||||||
* 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.