All names: SDSS J072025.53+370336.3, EQ J0720+3703, Gaia DR3 898123566204798720, SDSS J072025.52+370336.3, Gaia DR2 898123566204798720, Gaia EDR3 898123566204798720, GALEX J072025.5+370336
| 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 | 07 20 25.53 (0.2) | 07 20 25.53 | 07 20 25.53 (0.3) | 07 20 25.54 (0.2) | 07 20 25.53 | ||||||
| Declination | 37 03 36.36 (0.2) | 37 03 36.30 | 37 03 36.36 (0.3) | 37 03 36.31 (0.2) | 37 03 36.31 | ||||||
| Spectral type | DO | DAB | DO | DO | |||||||
| Effective temperature | [K] | 52733.0 (990) | 52000.0 | 50000.0 (50) | |||||||
| log(g) | [cgs] | 8.02 (0.1) | 7.75 (0.2) | 7.45 (0.06) | |||||||
| Mass | [M☉] | 0.66 (0.06) | 0.54 | ||||||||
| log(Luminosity) | [L☉] | 0.08 (0.09) | |||||||||
| Cooling age | [Gyr] | 0.0019 (0.0001) | |||||||||
| log(H/He) | |||||||||||
| log(C/He) | <0.01 | ||||||||||
| 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] | 1.19 (0.2) | 1.10 (0.4) | 1.19 (0.2) | |||||||
| Distance | [pc] | 841.34 (156) | 907.69 (307) | 841.33 (156) | |||||||
| Composition | He | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -4.758580217 (0.2) | -4.547 (0.5) | -4.759 (0.2) | |||||||
| Proper motion (declination) | [mas/yr] | 3.387810656 (0.2) | 2.849 (0.5) | 3.388 (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 | 17.84 (0.01) | 17.84 (0.01) | 17.85 (0.02) | ||||||||
| g magnitude | 18.27 (0.007) | 18.27 | 18.27 (0.007) | 18.29 (0.01) | |||||||
| r magnitude | 18.78 (0.01) | 18.78 (0.01) | 18.77 (0.02) | ||||||||
| i magnitude | 19.15 (0.02) | 19.16 (0.02) | 19.16 (0.02) | ||||||||
| z magnitude | 19.41 (0.07) | 19.41 (0.07) | 19.40 (0.07) | ||||||||
| G magnitude | 18.53 (0.02) | 18.57 | 18.53 (0.004) | ||||||||
| BP magnitude | 18.40 (0.02) | 18.33 | |||||||||
| RP magnitude | 18.79 (0.06) | 18.91 | |||||||||
| Pan g magnitude | 18.35 (0.007) | ||||||||||
| Pan r magnitude | 18.78 (0.01) | ||||||||||
| Pan i magnitude | 19.18 (0.006) | ||||||||||
| Pan z magnitude | 19.47 (0.04) | ||||||||||
| Pan y magnitude | 19.59 (0.02) | ||||||||||
| E(B-V) | 0.037 | ||||||||||
* 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.