All names: Gaia DR2 657211738106094976, [BGK2006] J081818.81+182126.8, GALEX J081818.8+182127, SDSSJ081818.80+182126.7, Gaia DR3 657211738106094976, TIC 14434172, 2MASS J08181879+1821268, SDSS J081818.80+182126.7, SDSS J081818.80+182126.8
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 08 18 18.81 | 08 18 18.81 (0.05) | ||
| Declination | 18 21 26.75 | 18 21 26.80 (0.03) | ||
| Spectral type | sdB+MS | sdA | ||
| 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] | 0.11 (0.08) | 0.09 (0.05) | |
| Distance | [pc] | 9033.42 (6749) | 11428.57 (6766) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -0.969 (0.1) | -0.99 (0.06) | |
| Proper motion (declination) | [mas/yr] | -0.386 (0.08) | -0.376 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 16.45 (0.1) | 16.45 (0.1) | ||
| H magnitude | 16.40 (0.2) | 16.40 (0.2) | ||
| K magnitude | 16.30 | |||
| u magnitude | 16.77 (0.007) | 16.77 (0.007) | ||
| g magnitude | 16.19 (0.003) | 16.19 (0.003) | ||
| r magnitude | 16.50 (0.004) | 16.50 (0.004) | ||
| i magnitude | 16.74 (0.005) | 16.74 (0.005) | ||
| z magnitude | 16.95 (0.01) | 16.97 (0.01) | ||
| G magnitude | 16.39 (0.001) | 16.37 (0.003) | ||
| BP magnitude | 16.31 (0.006) | |||
| RP magnitude | 16.43 (0.009) | |||
| Pan g magnitude | 16.25 (0.003) | |||
| Pan r magnitude | 16.53 (0.002) | |||
| Pan i magnitude | 16.78 (0.002) | |||
| Pan z magnitude | 16.95 (0.005) | |||
| Pan y magnitude | 17.02 (0.01) | |||
| E(B-V) | 0.034 | |||
* 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.