All names: TIC 328626457, WD 0936+560, Gaia DR3 1022128244227188224, SDSS J093942.30+555048.8, Gaia DR2 1022128244227188224, Gaia EDR3 1022128244227188224, J0939+5550, WDJ093942.32+555048.72, LAMOST J093942.30+555048.8, SDSS J093942.18+555048.8, LAMOST J093942.30+555048.7, SDSS J093942.30+555048.7, GALEX J093942.2+555049, 2MASS J09394231+5550488, SDSS J093942.29+555048.7, LAMOST J093942.19+555049.0
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Caron et al. 2023 | Coutu et al. 2019 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Dufour et al. 2007 | Harris et al. 2003 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 09 39 42.14 (0.04) | 09 39 42.30 | 09 39 42.32 | 09 39 42.14 (0.05) | 09 39 42.14 | 09 39 42.32 (0.04) | 09 39 42.14 | 09 39 42.30 | 09 39 42.19 | 09 39 42.30 | |||||||||
| Declination | 55 50 48.83 (0.03) | 55 50 48.81 | 55 50 48.72 | 55 50 48.82 (0.06) | 55 50 48.83 | 55 50 48.72 (0.03) | 55 50 48.82 | 55 50 48.77 | 55 50 42.36 | 55 50 48.73 | |||||||||
| Spectral type | DZA | DZA | DZA | DZA | DZ | DZA | DZA | DZA | DZAMG | DZA | DZ | ||||||||
| Effective temperature | [K] | 8888.0 (40) | 9023.0 (186) | 10074.0 | 10015.0 | 8680.0 (80) | 8879.0 (68) | 10088.0 (20) | 10116.0 (47) | ||||||||||
| log(g) | [cgs] | 8.01 (0.008) | 8.07 | 8.28 | 8.21 | 8.00 | 7.93 (0.01) | 7.51 (0.1) | 9.39 (0.3) | ||||||||||
| Mass | [M☉] | 0.583 (0.007) | 0.6221 | 0.775 | 0.712 | 0.538 (0.01) | |||||||||||||
| log(Luminosity) | [L☉] | ||||||||||||||||||
| Cooling age | [Gyr] | 0.9000 | 0.9030 | 0.8973 | 0.8483 | ||||||||||||||
| log(H/He) | -4.0 | -4.5669 (0.06) | -4.2 (0.05) | ||||||||||||||||
| log(C/He) | |||||||||||||||||||
| log(Ca/He) | -8.48 | -8.1769 (0.05) | -8.51 (0.02) | ||||||||||||||||
| 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] | 14.59 (0.06) | 14.61 (0.08) | 14.61 | 14.61 (0.08) | 14.59 | 14.59 (0.06) | 14.61 (0.08) | |||||||||||
| Distance | [pc] | 68.55 (0.3) | 68.45 (0.4) | 68.43 (0.4) | 68.43 (0.4) | 65.00 | 68.55 | 68.55 (0.3) | 68.43 (0.4) | ||||||||||
| Composition | He | He | He | ||||||||||||||||
| Proper motion (right ascension) | [mas/yr] | -94.74518908 (0.05) | -94.85426063 (0.1) | -94.745 (0.05) | -94.854 | -93.7 | |||||||||||||
| Proper motion (declination) | [mas/yr] | 6.500825729 (0.05) | 6.712624415 (0.1) | 6.501 (0.05) | 6.713 | 5.5 | |||||||||||||
| Variability | |||||||||||||||||||
| Magnetic | |||||||||||||||||||
| Bd | [MG] | ||||||||||||||||||
| Infrared excess (disk) | |||||||||||||||||||
| Binarity | |||||||||||||||||||
| B magnitude | |||||||||||||||||||
| V magnitude | |||||||||||||||||||
| R magnitude | |||||||||||||||||||
| I magnitude | |||||||||||||||||||
| J magnitude | 16.75 (0.02) | 16.71 (0.2) | |||||||||||||||||
| H magnitude | |||||||||||||||||||
| K magnitude | |||||||||||||||||||
| u magnitude | 17.01 (0.007) | 17.01 (0.007) | 17.05 | 17.01 (0.007) | 17.08 (0.008) | 17.05 (0.01) | 17.05 | 17.03 (0.01) | |||||||||||
| g magnitude | 16.73 (0.004) | 16.75 | 16.73 (0.004) | 16.76 (0.003) | 16.79 (0.02) | 16.75 | 16.78 (0.02) | ||||||||||||
| r magnitude | 16.82 (0.004) | 16.83 | 16.82 (0.004) | 16.83 (0.004) | 16.82 (0.01) | 16.83 | 16.80 (0.01) | ||||||||||||
| i magnitude | 16.96 (0.005) | 16.98 | 16.96 (0.005) | 16.96 (0.005) | 16.98 (0.01) | 16.98 | 16.97 (0.01) | ||||||||||||
| z magnitude | 17.18 (0.01) | 17.18 | 17.18 (0.01) | 17.17 (0.02) | 17.18 (0.02) | 17.18 | 17.17 (0.02) | ||||||||||||
| G magnitude | 16.74 (0.003) | 16.77 | 16.74 | 16.74 (0.003) | 16.77 | ||||||||||||||
| BP magnitude | 16.80 (0.003) | 16.79 | 16.79 | ||||||||||||||||
| RP magnitude | 16.67 (0.005) | 16.68 | 16.68 | ||||||||||||||||
| Pan g magnitude | 16.75 (0.007) | 16.75 (0.006) | |||||||||||||||||
| Pan r magnitude | 16.83 (0.002) | 16.83 (0.002) | |||||||||||||||||
| Pan i magnitude | 16.98 (0.003) | 16.98 (0.004) | |||||||||||||||||
| Pan z magnitude | 17.16 (0.004) | 17.16 (0.004) | |||||||||||||||||
| Pan y magnitude | 17.24 (0.006) | 17.24 (0.007) | |||||||||||||||||
| E(B-V) | 0.003 | ||||||||||||||||||
* 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.