All names: PG 1729+272, UCAC2 41385936, Gaia DR2 4595123151363393664, UCAC4 586-057961, SDSS J173118.27+270840.7, GALEX J173118.3+270840, 2MASS J17311826+2708407, PG1729+272, Gaia DR3 4595123151363393664, TIC 321695234
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 17 31 18.31 | 17 31 18.27 (0.02) | ||
| Declination | 27 08 40.56 | 27 08 40.72 (0.03) | ||
| Spectral type | sdB | 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] | 0.48 (0.04) | 0.59 (0.03) | |
| Distance | [pc] | 2072.54 (192) | 1684.92 (97) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -11.732 (0.07) | -11.813 (0.03) | |
| Proper motion (declination) | [mas/yr] | 6.984 (0.08) | 6.966 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.49 (0.02) | |||
| V magnitude | 15.73 (0.07) | |||
| R magnitude | 16.09 (0.3) | |||
| I magnitude | ||||
| J magnitude | 16.27 (0.1) | 16.27 (0.1) | ||
| H magnitude | 16.36 (0.2) | 16.36 (0.2) | ||
| K magnitude | 17.24 | |||
| u magnitude | 15.32 (0.004) | |||
| g magnitude | 15.44 (0.004) | 15.50 (0.03) | ||
| r magnitude | 15.88 (0.004) | 15.93 (0.1) | ||
| i magnitude | 16.21 (0.004) | |||
| z magnitude | 16.51 (0.008) | |||
| G magnitude | 15.69 (0.0006) | 15.67 (0.003) | ||
| BP magnitude | 15.51 (0.004) | |||
| RP magnitude | 15.90 (0.003) | |||
| Pan g magnitude | 15.52 (0.006) | |||
| Pan r magnitude | 15.91 (0.003) | |||
| Pan i magnitude | 16.23 (0.003) | |||
| Pan z magnitude | 16.51 (0.003) | |||
| Pan y magnitude | 16.67 (0.006) | |||
| 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.