All names: Gaia DR3 671353867118310528, Gaia DR2 671353867118310528, SDSS J073958.57+175834.3, GALEX J073958.5+175835, 2MASS J07395858+1758345, TIC 70547328, LAMOST J073958.54+175835.0, SDSSJ073958.57+175834.4, SDSS J073958.57+175834.4
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 07 39 58.57 | 07 39 58.58 (0.07) | ||
| Declination | 17 58 34.40 | 17 58 34.43 (0.06) | ||
| Spectral type | sdB+MS | sdB1He0+G/K | ||
| Effective temperature | [K] | |||
| log(g) | [cgs] | |||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.44 (0.1) | 0.46 (0.08) | |
| Distance | [pc] | 2256.32 (559) | 2194.91 (365) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -3.144 (0.2) | -2.802 (0.08) | |
| Proper motion (declination) | [mas/yr] | -4.511 (0.1) | -4.929 (0.06) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 14.70 (0.03) | 14.70 (0.03) | ||
| H magnitude | 14.27 (0.05) | 14.27 (0.05) | ||
| K magnitude | 14.21 (0.06) | 14.21 (0.06) | ||
| u magnitude | 14.60 (0.004) | 14.60 (0.004) | ||
| g magnitude | 14.75 (0.003) | 14.75 (0.003) | ||
| r magnitude | 15.09 (0.004) | 15.09 (0.004) | ||
| i magnitude | 15.25 (0.004) | 15.25 (0.004) | ||
| z magnitude | 15.35 (0.005) | 15.35 (0.005) | ||
| G magnitude | 14.92 (0.001) | 14.92 (0.003) | ||
| BP magnitude | 14.78 (0.008) | |||
| RP magnitude | 14.93 (0.003) | |||
| Pan g magnitude | 14.82 (0.003) | |||
| Pan r magnitude | 15.12 (0.003) | |||
| Pan i magnitude | 15.26 (0.01) | |||
| Pan z magnitude | 15.40 (0.005) | |||
| Pan y magnitude | 15.43 (0.002) | |||
| E(B-V) | 0.039 | |||
* 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.