All names: EQ J1509+2922, SDSS J150927.22+292206.3, SDSS J150927.23+292206.3, Gaia EDR3 1275033201568451712, SDSS J150927.23+292206.4, Gaia DR2 1275033201568451712, Gaia DR3 1275033201568451712
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Bedard et al. 2020 | Gaia DR2 | Stilism | Reindl et al. 2014 | Vincent et al. 2024 | Simbad | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 15 09 27.22 (0.04) | 15 09 27.23 | 15 09 27.22 (0.04) | 15 09 27.22 | 15 09 27.23 (0.04) | 15 09 27.23 | ||||||
| Declination | 29 22 06.59 (0.05) | 29 22 06.34 | 29 22 06.59 (0.07) | 29 22 06.60 | 29 22 06.30 (0.05) | 29 22 06.35 | ||||||
| Spectral type | DO | DO | DB | DOBAH: | DO | |||||||
| Effective temperature | [K] | 49846.0 (200) | 50000.0 | 51023.0 (6869) | 50000.0 (50) | |||||||
| log(g) | [cgs] | 8.05 (0.07) | 7.75 (0.2) | 7.89 (0.07) | 7.95 (0.03) | |||||||
| Mass | [M☉] | 0.68 (0.04) | 0.54 | 0.597 (0.05) | ||||||||
| log(Luminosity) | [L☉] | -0.04 (0.05) | ||||||||||
| Cooling age | [Gyr] | 0.0022 (0.0001) | ||||||||||
| log(H/He) | ||||||||||||
| log(C/He) | <0.003 | |||||||||||
| 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] | 1.88 (0.08) | 1.69 (0.1) | 1.88 | 1.88 (0.08) | |||||||
| Distance | [pc] | 531.46 (23) | 590.15 (35) | 531.46 | 531.46 (23) | |||||||
| Composition | He | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -6.808488305 (0.05) | -6.895299183 (0.1) | -6.808 (0.05) | ||||||||
| Proper motion (declination) | [mas/yr] | 18.59845413 (0.07) | 18.40427764 (0.2) | 18.598 (0.07) | ||||||||
| Variability | ||||||||||||
| Magnetic | ||||||||||||
| Bd | [MG] | |||||||||||
| Infrared excess (disk) | ||||||||||||
| Binarity | ||||||||||||
| B magnitude | ||||||||||||
| V magnitude | ||||||||||||
| R magnitude | ||||||||||||
| I magnitude | ||||||||||||
| J magnitude | ||||||||||||
| H magnitude | ||||||||||||
| K magnitude | ||||||||||||
| u magnitude | 16.91 (0.008) | 16.91 (0.008) | 16.91 (0.02) | |||||||||
| g magnitude | 17.32 (0.005) | 17.32 | 17.32 (0.005) | 17.35 (0.01) | ||||||||
| r magnitude | 17.83 (0.007) | 17.83 (0.007) | 17.82 (0.01) | |||||||||
| i magnitude | 18.19 (0.009) | 18.19 (0.009) | 18.18 (0.02) | |||||||||
| z magnitude | 18.52 (0.03) | 18.52 (0.03) | 18.51 (0.03) | |||||||||
| G magnitude | 17.58 (0.004) | 17.60 | 17.58 | 17.58 (0.003) | ||||||||
| BP magnitude | 17.42 (0.004) | 17.33 | ||||||||||
| RP magnitude | 17.89 (0.009) | 17.87 | ||||||||||
| Pan g magnitude | 17.40 (0.003) | |||||||||||
| Pan r magnitude | 17.85 (0.007) | |||||||||||
| Pan i magnitude | 18.21 (0.005) | |||||||||||
| Pan z magnitude | 18.54 (0.02) | |||||||||||
| Pan y magnitude | 18.71 (0.01) | |||||||||||
| E(B-V) | 0.032 | |||||||||||
* 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.