All names: LAMOST J003956.63+422929.4, WDJ003956.67+422929.41, LAMOST J003956.55+422929.6, Gaia EDR3 381396329995329408, GALEX J003956.5+422929, J0039+4229, Gaia DR2 381396329995329408, LAMOST J003956.55+422929.5, LAMOST J003956.55+422929.55, Gaia DR3 381396329995329408, SDSS J003956.63+422929.4, SDSS J003956.64+422929.5
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Caron et al. 2023 | Kilic et al. 2020 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Guo et al. 2015 | Zhao et al. 2013 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 00 39 56.48 (0.05) | 00 39 56.49 | 00 39 56.55 | 00 39 56.48 | 00 39 56.67 (0.05) | 00 39 56.49 | |||||||||
| Declination | 42 29 29.71 (0.04) | 42 29 29.70 | 42 29 29.55 | 42 29 29.71 | 42 29 29.41 (0.04) | 42 29 29.70 | |||||||||
| Spectral type | DA | DA | DA | DA | DA | DA | |||||||||
| Effective temperature | [K] | 9822.0 (50) | 9860.0 (45) | 9823.0 (50) | 9751.0 | 9798.0 | 18053.0 (816) | 9760.0 (87) | |||||||
| log(g) | [cgs] | 7.91 (0.01) | 7.89 (0.01) | 7.88 (0.01) | 7.87 | 7.81 | 7.32 (0.1) | 7.92 (0.02) | |||||||
| Mass | [M☉] | 0.546 (0.008) | 0.535 (0.009) | 0.532 (0.01) | 0.525 | 0.473 | 0.34 (0.05) | 0.551 (0.01) | |||||||
| log(Luminosity) | [L☉] | ||||||||||||||
| Cooling age | [Gyr] | 0.5700 | 0.5463 | 0.5140 | 0.0500 (0.01) | ||||||||||
| 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] | 13.18 (0.06) | 12.97 (0.1) | 12.97 (0.1) | 13.18 | 13.18 (0.06) | 12.97 (0.1) | ||||||||
| Distance | [pc] | 75.86 (0.4) | 77.10 (0.7) | 77.10 (0.6) | 181.00 | 75.86 | 75.86 (0.4) | 77.10 (0.6) | |||||||
| Composition | H | H | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | -127.2067873 (0.05) | -127.1619007 (0.1) | -127.207 (0.05) | -127.1619007 | ||||||||||
| Proper motion (declination) | [mas/yr] | 18.57488722 (0.05) | 18.61995454 (0.2) | 18.575 (0.05) | 18.61995454 | ||||||||||
| Variability | |||||||||||||||
| Magnetic | |||||||||||||||
| Bd | [MG] | ||||||||||||||
| Infrared excess (disk) | |||||||||||||||
| Binarity | |||||||||||||||
| B magnitude | |||||||||||||||
| V magnitude | |||||||||||||||
| R magnitude | |||||||||||||||
| I magnitude | |||||||||||||||
| J magnitude | 16.38 (0.01) | ||||||||||||||
| H magnitude | |||||||||||||||
| K magnitude | |||||||||||||||
| u magnitude | 16.91 (0.007) | 16.92 (0.007) | 16.92 (0.007) | ||||||||||||
| g magnitude | 16.43 | 16.48 (0.004) | 16.48 (0.004) | ||||||||||||
| r magnitude | 16.58 | 16.58 (0.004) | 16.58 (0.004) | ||||||||||||
| i magnitude | 16.72 | 16.70 (0.005) | 16.70 (0.005) | ||||||||||||
| z magnitude | 16.89 (0.01) | 16.89 (0.01) | |||||||||||||
| G magnitude | 16.49 (0.005) | 16.51 | 16.49 | 16.49 (0.003) | 16.51 | ||||||||||
| BP magnitude | 16.57 (0.005) | 16.57 | 16.57 | ||||||||||||
| RP magnitude | 16.42 (0.01) | 16.42 | 16.42 | ||||||||||||
| Pan g magnitude | 16.51 (0.004) | 16.51 (0.004) | |||||||||||||
| Pan r magnitude | 16.58 (0.002) | 16.58 (0.002) | |||||||||||||
| Pan i magnitude | 16.71 (0.004) | 16.71 (0.004) | |||||||||||||
| Pan z magnitude | 16.88 (0.005) | 16.88 (0.005) | |||||||||||||
| Pan y magnitude | 16.98 (0.006) | 16.98 (0.006) | |||||||||||||
| E(B-V) | 0.004 | ||||||||||||||
* 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.