All names: UCAC4 541-004458, J0227+1807, Gaia DR3 85787470611883008, Gaia DR2 85787470611883008, ** GWP 322B, WDJ022724.62+180724.03, Gaia EDR3 85787470611883008, PM J02274+1807W, TIC 247005078, 2MASS J02272460+1807241, WDS J02274+1807B
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | O'Brien et al. 2024 | Caron et al. 2023 | McCleery et al. 2020 | Tremblay et al. 2020 | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 02 27 24.72 (0.05) | 02 27 24.72 (0.1) | 02 27 24.72 | 02 27 24.72 | 02 27 24.62 (0.05) | 02 27 24.72 | ||||||
| Declination | 18 07 22.62 (0.06) | 18 07 22.67 (0.4) | 18 07 22.67 | 18 07 22.62 | 18 07 24.03 (0.06) | 18 07 22.67 | ||||||
| Spectral type | DA | DA | DA | DA | DA | DA | ||||||
| Effective temperature | [K] | 8540.0 (106) | 8436.0 (45) | 8443.9 (77) | 8440.0 (90) | 8651.0 (61) | ||||||
| log(g) | [cgs] | 7.93 (0.04) | 7.92 (0.01) | 7.97 (0.05) | 7.97 (0.05) | 7.97 (0.01) | ||||||
| Mass | [M☉] | 0.557 (0.02) | 0.55 (0.008) | 0.58 (0.01) | ||||||||
| log(Luminosity) | [L☉] | |||||||||||
| Cooling age | [Gyr] | 0.8800 | ||||||||||
| log(H/He) | ||||||||||||
| log(C/He) | ||||||||||||
| log(Ca/He) | ||||||||||||
| log(Ca/H) | ||||||||||||
| 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] | 26.73 (0.08) | 26.73 (0.08) | 26.73 (0.08) | 27.66 (0.5) | 27.66 (0.5) | 26.73 | 26.73 (0.08) | 27.66 (0.5) | |||
| Distance | [pc] | 37.42 (0.1) | 37.41 (0.1) | 37.41 (0.1) | 36.15 (0.7) | 36.15 (0.7) | 37.42 | 37.42 (0.1) | 36.15 (0.7) | |||
| Composition | H | H | ||||||||||
| Proper motion (right ascension) | [mas/yr] | 87.87047794 (0.06) | 88.12853121 (0.2) | 87.87 (0.07) | 88.12853121 | |||||||
| Proper motion (declination) | [mas/yr] | -88.20707531 (0.06) | -88.13981753 (0.2) | -88.207 (0.06) | -88.13981753 | |||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | 15.86 (0.01) | |||||||||||
| I magnitude | ||||||||||||
| J magnitude | 15.23 (0.06) | 15.23 (0.06) | ||||||||||
| H magnitude | 14.96 (0.09) | 14.96 (0.09) | ||||||||||
| K magnitude | 14.92 (0.1) | 14.92 (0.1) | ||||||||||
| u magnitude | ||||||||||||
| g magnitude | ||||||||||||
| r magnitude | ||||||||||||
| i magnitude | ||||||||||||
| z magnitude | ||||||||||||
| G magnitude | 15.50 (0.002) | 15.52 | 15.52 | 15.50 | 15.50 (0.003) | 15.52 | ||||||
| BP magnitude | 15.59 (0.002) | 15.59 | 15.59 | |||||||||
| RP magnitude | 15.29 (0.005) | 15.30 | 15.30 | |||||||||
| Pan g magnitude | 15.58 (0.006) | 15.58 (0.006) | ||||||||||
| Pan r magnitude | 15.57 (0.001) | 15.57 (0.001) | ||||||||||
| Pan i magnitude | 15.64 (0.002) | 15.64 (0.002) | ||||||||||
| Pan z magnitude | 15.74 (0.004) | 15.74 (0.004) | ||||||||||
| Pan y magnitude | 15.75 (0.06) | 15.75 (0.06) | ||||||||||
| E(B-V) | 0.001 | |||||||||||
* 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.