All names: TIC 239122172, SDSS J072351.47+301916.5, SDSSJ072351.47+301916.5, Ton 281, UCAC4 602-040466, GALEX J072351.4+301916, UCAC2 42399967, SA 51-822, LAMOST J072351.47+301916.5, 2MASS J07235148+3019165, EGGR 423, Gaia EDR3 885963418573729792, WD 0720+304, Gaia DR3 885963418573729792, WD 0720+30, Gaia DR2 885963418573729792
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Geier 2020 | Gaia DR2 | Stilism | Simbad | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 07 23 51.47 (0.04) | 07 23 51.47 | 07 23 51.47 | 07 23 51.47 (0.05) | 07 23 51.47 (0.04) | 07 23 52.39 | |||
| Declination | 30 19 16.46 (0.04) | 30 19 16.53 | 30 19 16.50 | 30 19 16.47 (0.05) | 30 19 16.66 (0.04) | 30 19 19.92 | |||
| Spectral type | sdB | sdB | sd | ||||||
| Effective temperature | [K] | 32400.0 (190) | |||||||
| log(g) | [cgs] | 5.91 (0.04) | |||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 1.28 (0.05) | 1.18 (0.06) | 1.18 (0.06) | 1.28 (0.05) | ||||
| Distance | [pc] | 781.06 (33) | 846.60 (44) | 846.57 (44) | 781.07 (33) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -7.648007996 (0.05) | -7.806 (0.09) | -7.806256736 (0.09) | -7.648 (0.05) | ||||
| Proper motion (declination) | [mas/yr] | -12.32235953 (0.04) | -12.273 (0.08) | -12.27319737 (0.08) | -12.322 (0.04) | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 14.82 (0.01) | ||||||||
| V magnitude | 15.04 (0.03) | ||||||||
| R magnitude | 15.47 (0.09) | ||||||||
| I magnitude | |||||||||
| J magnitude | 15.60 (0.06) | 15.60 (0.06) | |||||||
| H magnitude | 15.73 (0.2) | 15.73 (0.2) | |||||||
| K magnitude | 15.40 | ||||||||
| u magnitude | 14.54 (0.003) | 14.55 (0.003) | 14.55 (0.003) | ||||||
| g magnitude | 14.77 (0.003) | 14.77 (0.003) | 14.77 (0.003) | ||||||
| r magnitude | 15.24 (0.003) | 15.23 (0.003) | 15.23 (0.003) | ||||||
| i magnitude | 15.57 (0.004) | 15.56 (0.004) | 15.56 (0.004) | ||||||
| z magnitude | 15.88 (0.006) | 15.88 (0.006) | 15.88 (0.006) | ||||||
| G magnitude | 15.02 (0.003) | 15.04 (0.0009) | 15.04 | 15.02 (0.003) | |||||
| BP magnitude | 14.90 (0.003) | 14.83 (0.01) | 14.83 | ||||||
| RP magnitude | 15.26 (0.003) | 15.26 (0.005) | 15.26 | ||||||
| Pan g magnitude | 14.87 (0.004) | 14.87 (0.004) | |||||||
| Pan r magnitude | 15.26 (0.002) | 15.26 (0.002) | |||||||
| Pan i magnitude | 15.61 (0.002) | 15.61 (0.002) | |||||||
| Pan z magnitude | 15.87 (0.004) | 15.87 (0.004) | |||||||
| Pan y magnitude | 16.05 (0.006) | 16.05 (0.006) | |||||||
| E(B-V) | 0.042 | ||||||||
* 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.