All names: TIC 405540741, Gaia DR2 1353479675418573568, PG 1705+398, SDSS J170643.61+394356.7, GALEX J170643.6+394356, Gaia DR3 1353479675418573568, 2MASS J17064362+3943565, FBS B 149, PG1705+398, FBS 1705+398
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 17 06 43.63 | 17 06 43.62 (0.03) | ||
| Declination | 39 43 56.98 | 39 43 56.76 (0.04) | ||
| Spectral type | sdB+MS | sdB | ||
| 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] | 0.14 (0.07) | 0.38 (0.04) | |
| Distance | [pc] | 7117.44 (3298) | 2630.19 (272) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -3.427 (0.1) | -3.49 (0.04) | |
| Proper motion (declination) | [mas/yr] | -7.321 (0.1) | -7.519 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 16.01 | |||
| V magnitude | ||||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 16.30 (0.1) | 16.30 (0.1) | ||
| H magnitude | 16.24 (0.3) | 16.24 (0.3) | ||
| K magnitude | 15.56 (0.2) | 15.56 (0.2) | ||
| u magnitude | 16.21 (0.006) | 16.21 (0.006) | ||
| g magnitude | 16.27 (0.004) | 16.27 (0.004) | ||
| r magnitude | 16.60 (0.005) | 16.60 (0.005) | ||
| i magnitude | 16.76 (0.005) | 16.76 (0.005) | ||
| z magnitude | 16.90 (0.01) | 16.90 (0.01) | ||
| G magnitude | 16.40 (0.001) | 16.37 (0.003) | ||
| BP magnitude | 16.27 (0.01) | |||
| RP magnitude | 16.43 (0.005) | |||
| Pan g magnitude | 16.31 (0.005) | |||
| Pan r magnitude | 16.59 (0.005) | |||
| Pan i magnitude | 16.77 (0.003) | |||
| Pan z magnitude | 16.90 (0.004) | |||
| Pan y magnitude | 16.97 (0.01) | |||
| E(B-V) | 0.025 | |||
* 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.