All names: Gaia DR2 867233444154245504, Gaia DR3 867233444154245504, [BGK2006] J073912.57+225311.6, Gaia EDR3 867233444154245504, SDSS J073912.58+225311.58, SDSSJ073912.57+225311.6, SDSS J073912.57+225311.6, GALEX J073912.6+225312, 2MASS J07391257+2253117, SDSS J073912.56+225311.6, TIC 70439842, SDSS J073912.58+225311.5
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 07 39 12.57 (0.04) | 07 39 12.58 | 07 39 12.58 | 07 39 12.57 (0.06) | 07 39 12.57 (0.04) | ||||
| Declination | 22 53 11.55 (0.04) | 22 53 11.63 | 22 53 11.62 | 22 53 11.56 (0.05) | 22 53 11.67 (0.04) | ||||
| Spectral type | sdB | sdB | sdB | ||||||
| Effective temperature | [K] | 23807.0 (112) | |||||||
| log(g) | [cgs] | 5.00 (0.05) | |||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.18 (0.05) | 0.16 (0.07) | 0.16 (0.07) | 0.18 (0.05) | ||||
| Distance | [pc] | 5439.04 (1354) | 6226.65 (2532) | 6225.34 (2532) | 5437.74 (1354) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | 0.474949996 (0.05) | 0.249 (0.1) | 0.248856912 (0.1) | 0.475 (0.05) | ||||
| Proper motion (declination) | [mas/yr] | -7.011163752 (0.04) | -6.992 (0.09) | -6.991602458 (0.09) | -7.011 (0.04) | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | |||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | 16.07 (0.07) | 16.05 (0.006) | |||||||
| H magnitude | 16.12 (0.2) | 16.10 (0.02) | |||||||
| K magnitude | 15.90 (0.2) | 16.16 (0.03) | |||||||
| u magnitude | 15.66 (0.004) | 15.66 (0.004) | 15.69 (0.02) | 15.66 (0.004) | |||||
| g magnitude | 15.43 (0.003) | 15.43 (0.003) | 15.46 (0.02) | 15.43 (0.003) | |||||
| r magnitude | 15.84 (0.003) | 15.84 (0.003) | 15.85 (0.01) | 15.84 (0.003) | |||||
| i magnitude | 16.14 (0.004) | 16.14 (0.004) | 16.16 (0.03) | 16.14 (0.004) | |||||
| z magnitude | 16.40 (0.008) | 16.40 (0.008) | 16.41 (0.02) | 16.40 (0.008) | |||||
| G magnitude | 15.67 (0.002) | 15.69 (0.0008) | 15.69 | 15.67 (0.003) | |||||
| BP magnitude | 15.59 (0.002) | 15.55 (0.009) | 15.55 | ||||||
| RP magnitude | 15.82 (0.005) | 15.81 (0.008) | 15.81 | ||||||
| Pan g magnitude | 15.50 (0.001) | 15.51 (0.001) | |||||||
| Pan r magnitude | 15.87 (0.002) | 15.87 (0.002) | |||||||
| Pan i magnitude | 16.15 (0.003) | 16.16 (0.003) | |||||||
| Pan z magnitude | 16.38 (0.002) | 16.38 (0.002) | |||||||
| Pan y magnitude | 16.50 (0.006) | 16.50 (0.006) | |||||||
| 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.