All names: Gaia DR3 2465432384637068672, Gaia DR2 2465432384637068672, Gaia EDR3 2465432384637068672, SDSS J014405.93-075758.1, GALEX J014405.9-075757, SDSS J014405.93-075758.18, J0144-0757
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Coutu et al. 2019 | Gaia DR2 | Stilism | Kepler et al. 2016 | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 01 44 05.94 (0.4) | 01 44 05.93 | 01 44 05.94 | 01 44 05.94 (0.9) | 01 44 05.93 (0.4) | |||||
| Declination | -07 57 58.17 (0.3) | -07 57 58.18 | -07 57 58.01 | -07 57 58.16 (0.5) | -07 57 58.04 (0.3) | |||||
| Spectral type | DQ | DQ | DQ | DC | ||||||
| Effective temperature | [K] | 7296.0 (240) | 8187.0 (35) | |||||||
| log(g) | [cgs] | 8.30 | 8.00 (1) | |||||||
| Mass | [M☉] | 0.7692 | ||||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | 2.5500 | ||||||||
| log(H/He) | ||||||||||
| log(C/He) | -6.0573 (0.1) | -5.52 (0.06) | ||||||||
| 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] | 7.47 (0.5) | 7.12 | 7.12 (0.8) | 7.47 (0.5) | |||||
| Distance | [pc] | 133.92 (8) | 140.38 (16) | 140.38 (16) | 133.92 (8) | |||||
| Composition | He | He | ||||||||
| Proper motion (right ascension) | [mas/yr] | 9.9167137 (0.7) | 2.378225653 (2) | 9.917 (0.7) | ||||||
| Proper motion (declination) | [mas/yr] | -8.169329038 (0.4) | -9.536260371 (0.9) | -8.169 (0.4) | ||||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | ||||||||||
| B magnitude | ||||||||||
| V magnitude | ||||||||||
| R magnitude | ||||||||||
| I magnitude | ||||||||||
| J magnitude | ||||||||||
| H magnitude | ||||||||||
| K magnitude | ||||||||||
| u magnitude | 19.99 (0.05) | 20.05 (0.08) | 20.05 (0.08) | |||||||
| g magnitude | 19.63 (0.02) | 19.66 (0.03) | 19.66 (0.03) | |||||||
| r magnitude | 19.52 (0.02) | 19.58 (0.03) | 19.58 (0.03) | |||||||
| i magnitude | 19.51 (0.02) | 19.59 (0.03) | 19.59 (0.03) | |||||||
| z magnitude | 19.55 (0.1) | 19.56 (0.1) | 19.56 (0.1) | |||||||
| G magnitude | 19.62 (0.05) | 19.65 | 19.62 (0.006) | |||||||
| BP magnitude | 19.59 (0.05) | 19.47 | ||||||||
| RP magnitude | 19.22 (0.06) | 19.15 | ||||||||
| Pan g magnitude | 19.63 (0.02) | |||||||||
| Pan r magnitude | 19.55 (0.01) | |||||||||
| Pan i magnitude | 19.57 (0.008) | |||||||||
| Pan z magnitude | 19.64 (0.02) | |||||||||
| Pan y magnitude | 19.95 (0.09) | |||||||||
| E(B-V) | 0.005 | |||||||||
* 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.