All names: Gaia DR3 4457797962985739008, Gaia DR2 4457797962985739008, Gaia EDR3 4457798267925462784, Gaia DR3 4457798267925462784, TIC 393634602, SDSSJ155745.78+115842.1, SDSS J155745.78+115842.1, 2MASS J15574583+1158414, GALEX J155745.8+115842
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad | Vincent et al. 2023 |
|---|---|---|---|---|---|---|
| Right ascension | 15 57 41.25 (0.3) | 15 57 45.79 | 15 57 45.79 (0.05) | |||
| Declination | 12 00 13.33 (0.2) | 11 58 42.10 | 11 58 42.08 (0.04) | |||
| Spectral type | sdB+MS | sdB+? | DA | |||
| 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] | 3.18 (0.3) | 0.01 (0.09) | 0.07 (0.07) | ||
| Distance | [pc] | 314.05 (32) | 117647.06 (1211073) | 13869.63 (14004) | ||
| Composition | ||||||
| Proper motion (right ascension) | [mas/yr] | -34.604 (0.3) | -4.046 (0.1) | -3.898 (0.06) | ||
| Proper motion (declination) | [mas/yr] | -29.461 (0.2) | 1.221 (0.08) | 1.351 (0.05) | ||
| Variability | ||||||
| Magnetic | ||||||
| Bd | [MG] | |||||
| Infrared excess (disk) | ||||||
| Binarity | ||||||
| B magnitude | ||||||
| V magnitude | ||||||
| R magnitude | ||||||
| I magnitude | ||||||
| J magnitude | 16.49 (0.1) | 16.49 (0.1) | ||||
| H magnitude | 15.95 (0.2) | 15.95 (0.2) | ||||
| K magnitude | 15.89 | |||||
| u magnitude | 17.57 (0.01) | 17.57 (0.01) | ||||
| g magnitude | 17.13 (0.005) | 17.13 (0.005) | ||||
| r magnitude | 17.10 (0.005) | 17.10 (0.005) | ||||
| i magnitude | 17.12 (0.006) | 17.12 (0.006) | ||||
| z magnitude | 17.16 (0.01) | 17.16 (0.01) | ||||
| G magnitude | 19.60 (0.004) | 17.05 (0.0008) | 17.03 (0.003) | |||
| BP magnitude | 19.64 (0.04) | 17.15 (0.006) | ||||
| RP magnitude | 19.68 (0.07) | 16.78 (0.005) | ||||
| Pan g magnitude | 17.15 (0.005) | |||||
| Pan r magnitude | 17.11 (0.003) | |||||
| Pan i magnitude | 17.14 (0.004) | |||||
| Pan z magnitude | 17.18 (0.005) | |||||
| Pan y magnitude | 17.17 (0.004) | |||||
| E(B-V) | 0.035 | |||||
* 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.