All names: SDSS J142440.80+330439.6, Gaia EDR3 1477954046768973312, Gaia DR2 1477954046768973312, SDSS J142440.79+330439.5, GALEX J142440.8+330439, LAMOST J142440.79+330439.5, SDSS J142440.80+330439.5, Gaia DR3 1477954046768973312
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Bedard et al. 2020 | Gaia DR2 | Stilism | Reindl et al. 2014 | Simbad | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 14 24 40.78 (0.09) | 14 24 40.80 | 14 24 40.78 (0.1) | 14 24 40.80 (0.09) | 14 24 40.80 | ||||||
| Declination | 33 04 39.48 (0.1) | 33 04 39.56 | 33 04 39.48 (0.1) | 33 04 39.59 (0.1) | 33 04 39.57 | ||||||
| Spectral type | DO | DB | DOBAH: | DO | |||||||
| Effective temperature | [K] | 51061.0 (767) | 50000.0 | 50000.0 (198) | |||||||
| log(g) | [cgs] | 8.15 (0.1) | 7.50 (0.2) | 7.42 (0.2) | |||||||
| Mass | [M☉] | 0.73 (0.08) | 0.49 | ||||||||
| log(Luminosity) | [L☉] | -0.06 (0.1) | |||||||||
| Cooling age | [Gyr] | 0.0019 (0.0002) | |||||||||
| log(H/He) | |||||||||||
| log(C/He) | <0.005 | ||||||||||
| 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] | 1.03 (0.2) | 0.99 (0.2) | 1.03 (0.2) | |||||||
| Distance | [pc] | 967.66 (175) | 1007.62 (234) | 967.68 (175) | |||||||
| Composition | He | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -12.40685725 (0.09) | -12.22092777 (0.2) | -12.407 (0.1) | |||||||
| Proper motion (declination) | [mas/yr] | -6.66729437 (0.2) | -7.52053767 (0.4) | -6.667 (0.2) | |||||||
| Variability | |||||||||||
| Magnetic | |||||||||||
| Bd | [MG] | ||||||||||
| Infrared excess (disk) | |||||||||||
| Binarity | |||||||||||
| B magnitude | |||||||||||
| V magnitude | |||||||||||
| R magnitude | |||||||||||
| I magnitude | |||||||||||
| J magnitude | |||||||||||
| H magnitude | |||||||||||
| K magnitude | |||||||||||
| u magnitude | 18.10 (0.01) | 18.10 (0.01) | 18.08 (0.02) | ||||||||
| g magnitude | 18.57 (0.007) | 18.57 | 18.57 (0.007) | 18.56 (0.02) | |||||||
| r magnitude | 19.06 (0.01) | 19.06 (0.01) | 19.08 (0.02) | ||||||||
| i magnitude | 19.42 (0.02) | 19.42 (0.02) | 19.43 (0.02) | ||||||||
| z magnitude | 19.88 (0.08) | 19.88 (0.08) | 19.99 (0.08) | ||||||||
| G magnitude | 18.84 (0.01) | 18.88 | 18.84 (0.003) | ||||||||
| BP magnitude | 18.68 (0.01) | 18.58 | |||||||||
| RP magnitude | 19.21 (0.03) | 19.18 | |||||||||
| Pan g magnitude | 18.67 (0.0009) | ||||||||||
| Pan r magnitude | 19.11 (0.01) | ||||||||||
| Pan i magnitude | 19.49 (0.009) | ||||||||||
| Pan z magnitude | 19.82 (0.02) | ||||||||||
| Pan y magnitude | 20.05 (0.09) | ||||||||||
| E(B-V) | 0.018 | ||||||||||
* 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.