All names: GALEX 2667408659217122775, J0008+2507, Gaia DR2 2849930668862492544, Gaia DR3 2849930668862492544, SDSS J000810.33+250753.3, USNO-A2.0 1125-00053445, Gaia EDR3 2849930668862492544
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Coutu et al. 2019 | Gaia DR2 | Stilism | Simbad | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 00 08 10.31 (0.4) | 00 08 10.34 | 00 08 10.34 | 00 08 10.31 (0.5) | 00 08 10.34 (0.5) | 00 08 10.33 | ||||
| Declination | 25 07 52.82 (0.3) | 25 07 53.37 | 25 07 53.54 | 25 07 52.85 (0.5) | 25 07 53.54 (0.5) | 25 07 53.31 | ||||
| Spectral type | DQA | DQ | DQ_CI | hotDQ | ||||||
| Effective temperature | [K] | 10801.0 (525) | 39529.0 (837) | |||||||
| log(g) | [cgs] | 8.10 | 9.03 (0.2) | |||||||
| Mass | [M☉] | 0.6449 | ||||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | 0.5940 | ||||||||
| log(H/He) | -3 | |||||||||
| log(C/He) | -3.3704 (0.2) | |||||||||
| 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] | 4.12 (0.5) | 3.21 | 3.21 (0.6) | 3.21 (0.6) | |||||
| Distance | [pc] | 242.55 (27) | 311.10 (54) | 311.10 (54) | 311.10 (54) | |||||
| Composition | He | |||||||||
| Proper motion (right ascension) | [mas/yr] | -33.17534776 (0.5) | -30.46194721 (0.9) | -30.462 (0.9) | ||||||
| Proper motion (declination) | [mas/yr] | -45.20107499 (0.6) | -45.14245585 (0.9) | -45.142 (0.8) | ||||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | ||||||||||
| B magnitude | 18.70 (0.3) | |||||||||
| V magnitude | ||||||||||
| R magnitude | 19.30 (0.3) | |||||||||
| I magnitude | ||||||||||
| J magnitude | ||||||||||
| H magnitude | ||||||||||
| K magnitude | ||||||||||
| u magnitude | 19.90 (0.03) | 19.90 (0.03) | 19.87 (0.05) | |||||||
| g magnitude | 19.78 (0.01) | 19.78 (0.01) | 19.79 (0.02) | |||||||
| r magnitude | 20.02 (0.02) | 20.02 (0.02) | 20.06 (0.02) | |||||||
| i magnitude | 20.21 (0.03) | 20.21 (0.03) | 20.18 (0.03) | |||||||
| z magnitude | 20.23 (0.1) | 20.23 (0.1) | 20.75 (0.3) | |||||||
| G magnitude | 19.91 (0.05) | 19.97 | 19.97 (0.005) | |||||||
| BP magnitude | 19.94 (0.05) | 19.90 | ||||||||
| RP magnitude | 19.97 (0.07) | 19.86 | ||||||||
| Pan g magnitude | 19.82 (0.02) | |||||||||
| Pan r magnitude | 20.05 (0.01) | |||||||||
| Pan i magnitude | 20.27 (0.02) | |||||||||
| Pan z magnitude | 20.43 (0.05) | |||||||||
| Pan y magnitude | 20.29 (0.1) | |||||||||
| E(B-V) | 0.033 | |||||||||
* 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.