All names: Gaia DR3 1377891689708857856, GALEX J154039.2+395548, LAMOST J154039.03+395549.0, TIC 321543564, PG 1538+401, Gaia DR2 1377891689708857856, FBS 1538+401, PG1538+401, [TFW97] J154039.02+395549.25, 2MASS J15403902+3955488, FBS B 124
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 15 40 39.01 | 15 40 39.03 (0.02) | ||
| Declination | 39 55 50.03 | 39 55 49.07 (0.03) | ||
| Spectral type | sdB | sdO9VIIIHe0 | ||
| Effective temperature | [K] | 33800.0 (1510) | ||
| log(g) | [cgs] | 5.91 (0.2) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 2.37 (0.04) | 2.41 (0.03) | |
| Distance | [pc] | 422.30 (8) | 414.70 (5) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 8.137 (0.07) | 8.159 (0.03) | |
| Proper motion (declination) | [mas/yr] | -24.131 (0.09) | -24.098 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 13.13 | |||
| V magnitude | 13.22 | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 13.88 (0.03) | 13.88 (0.03) | ||
| H magnitude | 14.00 (0.04) | 14.00 (0.04) | ||
| K magnitude | 14.02 (0.05) | 14.02 (0.05) | ||
| u magnitude | 12.89 (0.003) | |||
| g magnitude | 13.23 (0.003) | |||
| r magnitude | 13.59 (0.005) | |||
| i magnitude | 14.10 (0.003) | |||
| z magnitude | 14.21 (0.005) | |||
| G magnitude | 13.21 (0.0007) | 13.20 (0.003) | ||
| BP magnitude | 12.98 (0.009) | |||
| RP magnitude | 13.50 (0.002) | |||
| Pan g magnitude | 13.39 | |||
| Pan r magnitude | 13.46 (0.001) | |||
| Pan i magnitude | 13.84 (0.003) | |||
| Pan z magnitude | 14.13 (0.002) | |||
| Pan y magnitude | 14.33 (0.002) | |||
| E(B-V) | 0.023 | |||
* 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.