All names: GALEX J155441.8+074657, Gaia EDR3 4454150882916516864, SDSSJ155441.82+074657.8, Gaia DR2 4454150951635553664, Gaia DR3 4454150951635553664, SDSS J155441.82+074657.8
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 15 54 44.72 (0.4) | 15 54 41.83 | 15 54 41.83 (0.05) | ||
| Declination | 07 46 34.77 (0.4) | 07 46 57.86 | 07 46 57.88 (0.05) | ||
| 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] | 1.80 (0.6) | 0.03 (0.09) | 0.13 (0.06) | |
| Distance | [pc] | 554.26 (171) | 32894.74 (95763) | 7830.85 (3869) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -5.872 (0.5) | -2.705 (0.1) | -2.764 (0.07) | |
| Proper motion (declination) | [mas/yr] | -4.965 (0.4) | -2.469 (0.1) | -2.438 (0.06) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | |||||
| V magnitude | |||||
| R magnitude | |||||
| I magnitude | |||||
| J magnitude | |||||
| H magnitude | |||||
| K magnitude | |||||
| u magnitude | 17.07 (0.008) | 17.07 (0.008) | |||
| g magnitude | 16.45 (0.004) | 16.45 (0.004) | |||
| r magnitude | 16.79 (0.004) | 16.79 (0.004) | |||
| i magnitude | 17.03 (0.005) | 17.03 (0.005) | |||
| z magnitude | 17.24 (0.01) | 17.24 (0.01) | |||
| G magnitude | 19.93 (0.005) | 16.66 (0.001) | 16.64 (0.003) | ||
| BP magnitude | 20.30 (0.07) | 16.61 (0.008) | |||
| RP magnitude | 19.43 (0.05) | 16.71 (0.005) | |||
| Pan g magnitude | 16.52 (0.006) | ||||
| Pan r magnitude | 16.80 (0.003) | ||||
| Pan i magnitude | 17.05 (0.004) | ||||
| Pan z magnitude | 17.22 (0.006) | ||||
| Pan y magnitude | 17.32 (0.01) | ||||
| E(B-V) | 0.037 | ||||
* 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.