All names: EPIC 228682372, SDSS J083959.93+142857.9, Gaia DR2 609475581792870528, SDSS J083959.93+142858.0, Gaia DR3 609475581792870528, GALEX J083959.9+142858, Gaia EDR3 609475581792870528
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Bedard et al. 2020 | Gaia DR2 | Stilism | Simbad | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 08 39 59.93 (0.3) | 08 39 59.94 | 08 39 59.93 (0.3) | 08 39 59.93 (0.3) | 08 39 59.93 | |||||
| Declination | 14 28 57.95 (0.1) | 14 28 57.99 | 14 28 57.95 (0.2) | 14 28 58.00 (0.1) | 14 28 58.03 | |||||
| Spectral type | DO | DAO | DO: | DO | ||||||
| Effective temperature | [K] | 111220.0 (9423) | 99802.0 (2372) | |||||||
| log(g) | [cgs] | 8.66 (0.6) | 5.04 (0.05) | |||||||
| Mass | [M☉] | 1.06 (0.3) | ||||||||
| log(Luminosity) | [L☉] | 0.94 (0.5) | ||||||||
| Cooling age | [Gyr] | 0.0001 (0.0001) | ||||||||
| log(H/He) | ||||||||||
| log(C/He) | ||||||||||
| 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] | 0.58 (0.3) | 0.68 (0.4) | 0.58 (0.3) | ||||||
| Distance | [pc] | 1717.45 (888) | 1460.27 (904) | 1717.33 (888) | ||||||
| Composition | He | |||||||||
| Proper motion (right ascension) | [mas/yr] | -3.050335538 (0.3) | -3.323723755 (0.7) | -3.05 (0.3) | ||||||
| Proper motion (declination) | [mas/yr] | -3.399103104 (0.2) | -3.549430231 (0.4) | -3.399 (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 | 18.15 (0.01) | 18.15 (0.01) | 18.14 (0.02) | |||||||
| g magnitude | 18.63 (0.008) | 18.63 (0.008) | 18.61 (0.02) | |||||||
| r magnitude | 19.18 (0.01) | 19.18 (0.01) | 19.19 (0.02) | |||||||
| i magnitude | 19.50 (0.02) | 19.50 (0.02) | 19.58 (0.03) | |||||||
| z magnitude | 19.84 (0.09) | 19.84 (0.09) | 19.86 (0.09) | |||||||
| G magnitude | 18.89 (0.02) | 18.94 | 18.89 (0.004) | |||||||
| BP magnitude | 18.75 (0.02) | 18.64 | ||||||||
| RP magnitude | 19.39 (0.06) | 19.18 | ||||||||
| Pan g magnitude | 18.71 (0.009) | |||||||||
| Pan r magnitude | 19.19 (0.01) | |||||||||
| Pan i magnitude | 19.58 (0.01) | |||||||||
| Pan z magnitude | 19.87 (0.05) | |||||||||
| Pan y magnitude | 19.97 (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.