All names: Gaia DR2 4028120776036373760, J1201+3400, SDSS J120154.69+340055.8, Gaia EDR3 4028120776036373760, SDSS J120154.70+340055.9, 2MASS J12015470+3400553, GALEX J120154.6+340055, 12019+3400, TIC 173083085, LAMOST J120154.69+340055.8, PM J12019+3400, SDSS J120154.70+340055.8, Gaia DR3 4028120776036373760, WDJ120154.71+340055.34
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Kilic et al. 2025 | Caron et al. 2023 | Coutu et al. 2019 | Gaia DR2 | Stilism | Guo et al. 2015 | Limoges et al. 2015 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 01 54.67 (0.06) | 12 01 54.69 | 12 01 54.71 | 12 01 54.67 (0.1) | 12 01 54.67 | 12 01 54.71 (0.06) | 12 01 54.67 | 12 01 54.70 | ||||||||
| Declination | 34 00 57.14 (0.05) | 34 00 55.84 | 34 00 55.34 | 34 00 57.09 (0.06) | 34 00 57.14 | 34 00 55.34 (0.05) | 34 00 57.09 | 34 00 55.85 | ||||||||
| Spectral type | DQ | DQ | DQ | CarbonWD | DQ | DQ | DQ | DQ | DQ | |||||||
| Effective temperature | [K] | 6094.0 (16) | 6101.0 (14) | 6134.0 (62) | 6110.0 (84) | 6543.0 (23) | 6300.0 (3) | |||||||||
| log(g) | [cgs] | 8.19 (0.006) | 8.19 (0.006) | 8.22 | 8.00 (0.2) | 8.33 (0.007) | 10.00 (0.003) | |||||||||
| Mass | [M☉] | 0.691 (0.005) | 0.694 (0.006) | 0.714 | 0.57 (0.1) | 0.788 (0.007) | ||||||||||
| log(Luminosity) | [L☉] | -3.70 | ||||||||||||||
| Cooling age | [Gyr] | 3.7400 | 3.9300 | |||||||||||||
| log(H/He) | ||||||||||||||||
| log(C/He) | -6.06 | -5.98 | -5.9706 (0.01) | |||||||||||||
| log(Ca/He) | ||||||||||||||||
| 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] | 24.61 (0.08) | 24.68 (0.1) | 24.68 | 24.68 (0.1) | 24.61 | 24.61 (0.08) | 24.68 (0.1) | ||||||||
| Distance | [pc] | 40.64 (0.1) | 40.52 (0.2) | 40.52 (0.2) | 40.52 (0.2) | 46.40 (0.8) | 40.64 | 40.64 (0.1) | 40.52 (0.2) | |||||||
| Composition | He | He | He | He | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -29.50835099 (0.06) | -29.61708662 (0.2) | -27.0 | -29.508 (0.06) | -29.61708662 | ||||||||||
| Proper motion (declination) | [mas/yr] | 112.3740436 (0.06) | 112.4520276 (0.1) | 127.0 | 112.374 (0.06) | 112.4520276 | ||||||||||
| Variability | ||||||||||||||||
| Magnetic | ||||||||||||||||
| Bd | [MG] | |||||||||||||||
| Infrared excess (disk) | ||||||||||||||||
| Binarity | ||||||||||||||||
| B magnitude | ||||||||||||||||
| V magnitude | ||||||||||||||||
| R magnitude | ||||||||||||||||
| I magnitude | ||||||||||||||||
| J magnitude | 16.55 (0.02) | 16.76 | 16.76 (0.2) | |||||||||||||
| H magnitude | 15.95 (0.03) | 15.95 | ||||||||||||||
| K magnitude | 15.53 (0.03) | 15.53 | ||||||||||||||
| u magnitude | 18.24 (0.01) | 18.24 (0.01) | 18.24 | 18.24 (0.01) | 18.24 (0.01) | 18.25 (0.02) | ||||||||||
| g magnitude | 17.74 (0.005) | 17.74 | 17.74 (0.005) | 17.74 (0.005) | 17.76 (0.02) | |||||||||||
| r magnitude | 17.27 (0.005) | 17.26 | 17.27 (0.005) | 17.27 (0.005) | 17.27 (0.01) | |||||||||||
| i magnitude | 17.19 (0.005) | 17.18 | 17.19 (0.005) | 17.19 (0.005) | 17.21 (0.02) | |||||||||||
| z magnitude | 17.25 (0.01) | 17.23 | 17.25 (0.01) | 17.25 (0.01) | 17.26 (0.02) | |||||||||||
| G magnitude | 17.33 (0.01) | 17.34 | 17.33 | 17.33 (0.003) | 17.34 | |||||||||||
| BP magnitude | 17.58 (0.01) | 17.59 | 17.59 | |||||||||||||
| RP magnitude | 16.84 (0.005) | 16.85 | 16.85 | |||||||||||||
| Pan g magnitude | 17.70 (0.008) | 17.70 (0.007) | ||||||||||||||
| Pan r magnitude | 17.26 (0.003) | 17.26 (0.004) | ||||||||||||||
| Pan i magnitude | 17.19 (0.006) | 17.19 (0.006) | ||||||||||||||
| Pan z magnitude | 17.22 (0.007) | 17.22 (0.005) | ||||||||||||||
| Pan y magnitude | 17.27 (0.007) | 17.27 (0.007) | ||||||||||||||
| 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.