All names: 2MASS J15405772+3518343, TIC 16993518, FBS 1539+355, FBS B 572, Gaia DR2 1374324770909412224, GALEXJ15409+3518, SDSS J154057.73+351834.3, Gaia DR3 1374324770909412224, GALEX J154057.7+351835
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 15 40 57.76 | 15 40 57.73 (0.02) | ||
| Declination | 35 18 35.22 | 35 18 34.35 (0.03) | ||
| Spectral type | sdB | sdOB | ||
| 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 (0.04) | 0.44 (0.03) | |
| Distance | [pc] | 2298.32 (220) | 2279.46 (167) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -1.923 (0.06) | -1.804 (0.03) | |
| Proper motion (declination) | [mas/yr] | -1.876 (0.08) | -1.767 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | ||||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 15.87 (0.07) | 15.87 (0.07) | ||
| H magnitude | 16.04 | |||
| K magnitude | 15.69 (0.2) | 15.69 (0.2) | ||
| u magnitude | 14.63 (0.005) | 14.62 (0.01) | ||
| g magnitude | 14.82 (0.004) | 14.86 (0.01) | ||
| r magnitude | 15.37 (0.004) | 15.37 (0.01) | ||
| i magnitude | 15.76 (0.005) | 15.76 (0.01) | ||
| z magnitude | 16.05 (0.008) | 16.05 (0.02) | ||
| G magnitude | 15.13 (0.001) | 15.12 (0.003) | ||
| BP magnitude | 14.91 (0.01) | |||
| RP magnitude | 15.42 (0.004) | |||
| Pan g magnitude | 14.95 (0.006) | |||
| Pan r magnitude | 15.38 (0.007) | |||
| Pan i magnitude | 15.77 (0.003) | |||
| Pan z magnitude | 16.04 (0.003) | |||
| Pan y magnitude | 16.23 (0.009) | |||
| E(B-V) | 0.024 | |||
* 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.