All names: J0838+2322, Gaia DR2 666207736086203648, SDSS J083858.56+232252.9, Gaia DR3 666207740383536640, Gaia EDR3 666207740383536640, WDJ083858.55+232252.98
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR14 | Caron et al. 2023 | Blouin 2020 | Coutu et al. 2019 | MWDD H | MWDD HE | Gaia DR2 | Hollands et al. 2017 | Stilism | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 38 58.59 (0.2) | 08 38 58.56 | 08 38 58.56 | 08 38 58.59 (0.3) | 08 38 58.59 | 08 38 58.55 (0.2) | 08 38 58.59 | |||||||||
| Declination | 23 22 52.66 (0.1) | 23 22 52.92 | 23 22 52.92 | 23 22 52.67 (0.2) | 23 22 52.66 | 23 22 52.98 (0.1) | 23 22 52.67 | |||||||||
| Spectral type | DZ | DZ | DZ | DZ | DZ | DZ | DZ | |||||||||
| Effective temperature | [K] | 5880.0 (46) | 6048.0 (182) | 6037.0 (61) | 6561.0 | 6352.0 | 5670.0 (80) | 6068.0 (143) | ||||||||
| log(g) | [cgs] | 8.18 (0.03) | 8.24 (0.04) | 8.25 | 8.39 | 8.29 | 8.32 (0.04) | |||||||||
| Mass | [M☉] | 0.684 (0.03) | 0.727 (0.03) | 0.7287 | 0.843 | 0.762 | 0.777 (0.04) | |||||||||
| log(Luminosity) | [L☉] | |||||||||||||||
| Cooling age | [Gyr] | 4.3000 | 4.3200 | 3.9310 | 3.8730 | 4.1000 | ||||||||||
| log(H/He) | -3.0 | <-3.0 | ||||||||||||||
| log(C/He) | ||||||||||||||||
| log(Ca/He) | -9.91 | -9.8 (0.2) | -9.8381 (0.1) | -9.8 | ||||||||||||
| log(Ca/H) | ||||||||||||||||
| log(N/He) | ||||||||||||||||
| log(O/He) | ||||||||||||||||
| log(Na/He) | ||||||||||||||||
| log(Mg/He) | -8.6 (0.5) | -8.89 | ||||||||||||||
| 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) | -8.7 (0.5) | -9.3 | ||||||||||||||
| log(Co/He) | ||||||||||||||||
| log(Ni/He) | ||||||||||||||||
| log(Cu/He) | ||||||||||||||||
| log(Zn/He) | ||||||||||||||||
| log(Ga/He) | ||||||||||||||||
| log(Ge/He) | ||||||||||||||||
| log(Sr/He) | ||||||||||||||||
| Parallax | [mas] | 12.19 (0.2) | 11.85 (0.3) | 11.85 | 11.85 (0.3) | 12.19 | 12.19 (0.2) | 11.85 (0.3) | ||||||||
| Distance | [pc] | 82.02 (2) | 84.39 (2) | 84.30 (2) | 84.41 (2) | 84.41 (2) | 84.00 (10) | 82.02 | 82.02 (2) | 84.41 (2) | ||||||
| Composition | He | He | He | He | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | 31.22596209 (0.3) | 30.79808089 (0.6) | 31.226 (0.3) | 30.79808089 | |||||||||||
| Proper motion (declination) | [mas/yr] | -20.22431497 (0.2) | -20.01634621 (0.4) | -20.224 (0.2) | -20.01634621 | |||||||||||
| Variability | ||||||||||||||||
| Magnetic | ||||||||||||||||
| Bd | [MG] | |||||||||||||||
| Infrared excess (disk) | ||||||||||||||||
| Binarity | ||||||||||||||||
| B magnitude | ||||||||||||||||
| V magnitude | ||||||||||||||||
| R magnitude | ||||||||||||||||
| I magnitude | ||||||||||||||||
| J magnitude | 18.24 (0.05) | |||||||||||||||
| H magnitude | ||||||||||||||||
| K magnitude | ||||||||||||||||
| u magnitude | 20.20 (0.05) | 20.38 (0.05) | 20.19 (0.05) | 20.19 (0.05) | 20.19 (0.05) | 20.19 (0.05) | ||||||||||
| g magnitude | 19.22 (0.01) | 19.21 (0.02) | 19.21 (0.02) | 19.21 (0.01) | 19.21 (0.01) | |||||||||||
| r magnitude | 18.85 (0.01) | 18.86 (0.01) | 18.86 (0.01) | 18.85 (0.01) | 18.85 (0.01) | |||||||||||
| i magnitude | 18.81 (0.01) | 18.82 (0.02) | 18.82 (0.02) | 18.81 (0.01) | 18.81 (0.01) | |||||||||||
| z magnitude | 18.83 (0.04) | 18.84 (0.04) | 18.84 (0.04) | 18.82 (0.04) | 18.82 (0.04) | |||||||||||
| G magnitude | 18.89 (0.02) | 18.92 | 18.89 | 18.89 (0.003) | 18.92 | |||||||||||
| BP magnitude | 19.18 (0.02) | 19.20 | 19.20 | |||||||||||||
| RP magnitude | 18.57 (0.03) | 18.51 | 18.51 | |||||||||||||
| Pan g magnitude | 19.14 (0.009) | 19.14 (0.01) | ||||||||||||||
| Pan r magnitude | 18.86 (0.008) | 18.86 (0.009) | ||||||||||||||
| Pan i magnitude | 18.84 (0.01) | 18.84 (0.009) | ||||||||||||||
| Pan z magnitude | 18.85 (0.02) | 18.85 (0.02) | ||||||||||||||
| Pan y magnitude | 18.93 (0.09) | 18.93 (0.1) | ||||||||||||||
| 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.