All names: Gaia DR2 942347092105836160, J0639+3639, SDSS J063947.26+363941.2, Gaia EDR3 942347092105836160, Gaia DR3 942347092105836160, GALEX J063947.2+363941, SDSS J063947.25+363941.2, WDJ063947.23+363942.04, SDSS J063947.26+363941.3
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Caron et al. 2023 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 06 39 47.31 (0.08) | 06 39 47.26 | 06 39 47.30 (0.1) | 06 39 47.31 | 06 39 47.23 (0.08) | 06 39 47.30 | 06 39 47.26 | |||||||
| Declination | 36 39 40.08 (0.07) | 36 39 41.24 | 36 39 40.15 (0.1) | 36 39 40.08 | 36 39 42.04 (0.07) | 36 39 40.15 | 36 39 41.26 | |||||||
| Spectral type | DA | DA | DA | DA | DA | |||||||||
| Effective temperature | [K] | 7863.0 (40) | 7774.0 | 7495.0 | 7831.0 (138) | 7728.0 (26) | ||||||||
| log(g) | [cgs] | 8.08 (0.01) | 8.05 | 7.95 | 8.07 (0.03) | 7.90 (0.05) | ||||||||
| Mass | [M☉] | 0.644 (0.01) | 0.624 | 0.544 | 0.635 (0.03) | 0.542 (0.03) | ||||||||
| log(Luminosity) | [L☉] | |||||||||||||
| Cooling age | [Gyr] | 1.3100 | 1.2410 | 1.2260 | ||||||||||
| 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] | 13.57 (0.09) | 13.64 (0.1) | 13.64 (0.1) | 13.57 | 13.57 (0.09) | 13.64 (0.1) | |||||||
| Distance | [pc] | 73.70 (0.5) | 73.31 (0.6) | 73.32 (0.6) | 73.70 | 73.70 (0.5) | 73.32 (0.6) | |||||||
| Composition | H | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | 58.31158568 (0.1) | 58.26846301 (0.2) | 58.312 (0.1) | 58.26846301 | |||||||||
| Proper motion (declination) | [mas/yr] | -122.1783733 (0.09) | -122.1146831 (0.2) | -122.178 (0.09) | -122.1146831 | |||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | ||||||||||||||
| V magnitude | ||||||||||||||
| R magnitude | ||||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | 17.01 (0.03) | |||||||||||||
| H magnitude | ||||||||||||||
| K magnitude | ||||||||||||||
| u magnitude | 18.03 (0.01) | 18.03 (0.01) | 18.03 (0.01) | 18.03 (0.01) | 18.03 (0.02) | |||||||||
| g magnitude | 17.55 (0.005) | 17.55 (0.005) | 17.55 (0.005) | 17.55 (0.01) | ||||||||||
| r magnitude | 17.47 (0.006) | 17.47 (0.006) | 17.47 (0.006) | 17.48 (0.01) | ||||||||||
| i magnitude | 17.48 (0.007) | 17.48 (0.007) | 17.48 (0.007) | 17.49 (0.01) | ||||||||||
| z magnitude | 17.58 (0.01) | 17.58 (0.01) | 17.58 (0.01) | 17.56 (0.02) | ||||||||||
| G magnitude | 17.44 (0.01) | 17.46 | 17.44 | 17.44 (0.003) | 17.46 | |||||||||
| BP magnitude | 17.60 (0.01) | 17.58 | 17.58 | |||||||||||
| RP magnitude | 17.20 (0.009) | 17.18 | 17.18 | |||||||||||
| Pan g magnitude | 17.56 (0.006) | 17.56 (0.005) | ||||||||||||
| Pan r magnitude | 17.49 (0.003) | 17.49 (0.003) | ||||||||||||
| Pan i magnitude | 17.52 (0.007) | 17.52 (0.006) | ||||||||||||
| Pan z magnitude | 17.58 (0.003) | 17.58 (0.003) | ||||||||||||
| Pan y magnitude | 17.65 (0.01) | 17.65 (0.02) | ||||||||||||
| 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.