All names: WISE J224014.21+020632.7, TIC 421991098, PG2237+018, Gaia DR2 2654860474117747200, HE 2237+0150, WISEA J224014.23+020632.3, UCAC4 461-129782, 2MASS J22401423+0206312, SDSS J224014.26+020632.1, GALEX J224014.2+020631, PHL 367, PG 2237+018, LAMOST J224014.25+020632.1, Gaia DR3 2654860474117747200
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 22 40 14.38 | 22 40 14.26 (0.05) | ||
| Declination | 02 06 31.29 | 02 06 32.18 (0.04) | ||
| Spectral type | sdB | sdB | ||
| Effective temperature | [K] | 25606.0 (500) | ||
| log(g) | [cgs] | 5.38 (0.05) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.35 (0.1) | 0.55 (0.05) | |
| Distance | [pc] | 2881.01 (790) | 1826.15 (177) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 3.886 (0.2) | 3.89 (0.06) | |
| Proper motion (declination) | [mas/yr] | -4.883 (0.1) | -5.04 (0.05) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.78 (0.02) | |||
| V magnitude | 15.71 (0.2) | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 16.23 (0.1) | 16.23 (0.1) | ||
| H magnitude | 16.21 (0.2) | 16.21 (0.2) | ||
| K magnitude | 16.51 | |||
| u magnitude | 15.70 (0.005) | |||
| g magnitude | 15.70 (0.004) | |||
| r magnitude | 16.06 (0.004) | |||
| i magnitude | 16.35 (0.005) | |||
| z magnitude | 16.63 (0.009) | |||
| G magnitude | 15.90 (0.001) | 15.88 (0.003) | ||
| BP magnitude | 15.78 (0.01) | |||
| RP magnitude | 16.03 (0.007) | |||
| Pan g magnitude | ||||
| Pan r magnitude | ||||
| Pan i magnitude | 19.71 (0) | |||
| Pan z magnitude | ||||
| Pan y magnitude | ||||
| E(B-V) | 0.060 | |||
* 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.