All names: SDSS J154307.44+041708.6, PG 1540+044, Gaia EDR3 4424747330647399680, Gaia DR3 4424747330647399680, 2MASS J15430744+0417086, TIC 459422873, PG1540+044, GALEX J154307.4+041708, Gaia DR2 4424747330647399680
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 15 43 07.43 (0.06) | 15 43 07.48 | 15 43 07.45 (0.06) | ||
| Declination | 04 17 08.65 (0.07) | 04 17 08.81 | 04 17 08.69 (0.07) | ||
| Spectral type | sd | sd | |||
| 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] | 0.38 (0.07) | 0.34 (0.1) | 0.38 (0.07) | |
| Distance | [pc] | 2660.28 (512) | 2929.97 (896) | 2660.28 (512) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -11.22 (0.08) | -11.702 (0.2) | -11.22 (0.08) | |
| Proper motion (declination) | [mas/yr] | -2.762 (0.08) | -2.437 (0.2) | -2.762 (0.08) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 15.84 | ||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | 16.81 (0.1) | 16.89 (0.02) | |||
| H magnitude | 16.61 | 16.98 (0.03) | |||
| K magnitude | 16.25 | 17.16 (0.06) | |||
| u magnitude | 15.82 (0.005) | 15.85 (0.01) | |||
| g magnitude | 16.06 (0.004) | 16.08 (0.02) | |||
| r magnitude | 16.56 (0.005) | 16.57 (0.02) | |||
| i magnitude | 16.88 (0.006) | 16.86 (0.02) | |||
| z magnitude | 17.22 (0.01) | 17.21 (0.02) | |||
| G magnitude | 16.32 (0.003) | 16.35 (0.002) | 16.32 (0.003) | ||
| BP magnitude | 16.19 (0.005) | 16.14 (0.01) | |||
| RP magnitude | 16.57 (0.009) | 16.56 (0.006) | |||
| Pan g magnitude | 16.15 (0.002) | ||||
| Pan r magnitude | 16.56 (0.002) | ||||
| Pan i magnitude | 16.91 (0.002) | ||||
| Pan z magnitude | 17.15 (0.006) | ||||
| Pan y magnitude | 17.36 (0.006) | ||||
| E(B-V) | 0.041 | ||||
* 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.