All names: Gaia DR2 4601638307512889088, TIC 39429290, Gaia EDR3 4601638307512889088, SDSSJ173057.94+320737.0, SDSS J173057.93+320736.9, USNO-B1.0 1221-00340655, SDSS J173057.94+320737.0, Gaia DR3 4601638307512889088, SDSS J173057.93+320736.98, SDSS J173057.93+320737.0, GALEX J173057.9+320737, 2MASS J17305791+3207367, SDSS J173057.94+320737.02, PG 1729+322
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2016 | Kepler et al. 2015 | Simbad |
|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 17 30 57.93 (0.03) | 17 30 57.93 | 17 30 57.94 | 17 30 57.93 (0.05) | 17 30 57.94 (0.03) | |||||
| Declination | 32 07 36.97 (0.04) | 32 07 37.05 | 32 07 37.00 | 32 07 36.97 (0.06) | 32 07 37.08 (0.04) | |||||
| Spectral type | sdB | sdB | sdB | sdB | ||||||
| Effective temperature | [K] | 28200.0 (700) | 28519.0 (128) | 29612.0 (104) | ||||||
| log(g) | [cgs] | 5.40 (0.05) | 5.52 (0.02) | 5.52 (0.02) | ||||||
| Mass | [M☉] | |||||||||
| log(Luminosity) | [L☉] | |||||||||
| Cooling age | [Gyr] | |||||||||
| log(H/He) | ||||||||||
| log(C/He) | ||||||||||
| log(Ca/He) | ||||||||||
| log(Ca/H) | ||||||||||
| Parallax | [mas] | 0.39 (0.04) | 0.35 (0.07) | 0.35 (0.07) | 0.39 (0.04) | |||||
| Distance | [pc] | 2543.41 (281) | 2894.36 (549) | 2894.19 (549) | 2543.23 (281) | |||||
| Composition | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -4.390820815 (0.05) | -4.475 (0.1) | -4.474606274 (0.1) | -4.391 (0.05) | |||||
| Proper motion (declination) | [mas/yr] | -7.194189705 (0.05) | -7.205 (0.1) | -7.204856805 (0.1) | -7.194 (0.05) | |||||
| Variability | ||||||||||
| Magnetic | ||||||||||
| Bd | [MG] | |||||||||
| Infrared excess (disk) | ||||||||||
| Binarity | ||||||||||
| B magnitude | 16.00 | |||||||||
| V magnitude | ||||||||||
| R magnitude | 16.10 | |||||||||
| I magnitude | ||||||||||
| J magnitude | 16.82 (0.1) | 16.82 (0.1) | ||||||||
| H magnitude | 17.24 | |||||||||
| K magnitude | 16.61 | |||||||||
| u magnitude | 15.82 (0.005) | 15.82 (0.005) | 15.84 (0.02) | 15.84 (0.02) | 15.82 (0.005) | |||||
| g magnitude | 15.90 (0.004) | 15.90 (0.004) | 15.92 (0.01) | 15.92 (0.01) | 15.90 (0.004) | |||||
| r magnitude | 16.40 (0.005) | 16.40 (0.005) | 16.41 (0.01) | 16.41 (0.01) | 16.40 (0.005) | |||||
| i magnitude | 16.73 (0.005) | 16.73 (0.005) | 16.72 (0.009) | 16.72 (0.01) | 16.73 (0.005) | |||||
| z magnitude | 17.02 (0.01) | 17.02 (0.01) | 17.02 (0.02) | 17.02 (0.02) | 17.02 (0.01) | |||||
| G magnitude | 16.15 (0.003) | 16.17 (0.001) | 16.17 | 16.15 (0.003) | ||||||
| BP magnitude | 16.03 (0.003) | 15.97 (0.008) | 15.97 | |||||||
| RP magnitude | 16.40 (0.004) | 16.40 (0.004) | 16.40 | |||||||
| Pan g magnitude | 15.98 (0.004) | 15.98 (0.004) | ||||||||
| Pan r magnitude | 16.39 (0.003) | 16.39 (0.003) | ||||||||
| Pan i magnitude | 16.73 (0.002) | 16.73 (0.002) | ||||||||
| Pan z magnitude | 17.00 (0.006) | 17.00 (0.006) | ||||||||
| Pan y magnitude | 17.15 (0.008) | 17.15 (0.008) | ||||||||
| E(B-V) | 0.028 | |||||||||
* 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.