All names: Gaia DR2 1399993557054575232, PG 1555+489, Gaia DR3 1399993557054575232, SDSS J155729.92+485023.20, SDSS J155729.93+485023.2, Gaia EDR3 1399993557054575232, SDSS J155729.92+485023.2, UCAC4 695-055841, GALEX J155729.6+485021, PG1555+489, LAMOST J155729.86+485022.7
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2016 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 15 57 29.92 (0.04) | 15 57 29.93 | 15 57 29.98 | 15 57 29.92 (0.05) | 15 57 29.93 (0.04) | ||||
| Declination | 48 50 23.17 (0.05) | 48 50 23.27 | 48 50 23.43 | 48 50 23.17 (0.06) | 48 50 23.22 (0.05) | ||||
| Spectral type | He-sdO | sdO | sdOB | ||||||
| Effective temperature | [K] | 49774.0 (634) | 40000.0 (10000) | ||||||
| log(g) | [cgs] | 6.21 (0.06) | 6.00 (0) | ||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.31 (0.05) | 0.35 (0.06) | 0.35 (0.06) | 0.31 (0.05) | ||||
| Distance | [pc] | 3230.09 (527) | 2866.15 (517) | 2866.45 (517) | 3229.97 (527) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -5.91764819 (0.06) | -5.94 (0.1) | -5.940089604 (0.1) | -5.918 (0.06) | ||||
| Proper motion (declination) | [mas/yr] | -3.544360476 (0.06) | -3.39 (0.1) | -3.390251681 (0.1) | -3.544 (0.06) | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 16.23 (0.05) | ||||||||
| V magnitude | 16.35 (0.01) | ||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | |||||||||
| H magnitude | |||||||||
| K magnitude | |||||||||
| u magnitude | 15.80 (0.005) | 15.81 (0.005) | 15.81 (0.01) | 15.81 (0.01) | |||||
| g magnitude | 16.23 (0.004) | 16.23 (0.004) | 16.26 (0.02) | 16.26 (0.02) | |||||
| r magnitude | 16.76 (0.004) | 16.76 (0.004) | 16.77 (0.01) | 16.77 (0.01) | |||||
| i magnitude | 17.13 (0.005) | 17.12 (0.005) | 17.13 (0.01) | 17.13 (0.01) | |||||
| z magnitude | 17.45 (0.01) | 17.46 (0.01) | 17.46 (0.02) | 17.45 (0.02) | |||||
| G magnitude | 16.49 (0.003) | 16.52 (0.002) | 16.52 | 16.49 (0.003) | |||||
| BP magnitude | 16.33 (0.003) | 16.26 (0.009) | 16.26 | ||||||
| RP magnitude | 16.81 (0.006) | 16.80 (0.009) | 16.80 | ||||||
| Pan g magnitude | 16.34 (0.004) | 16.34 (0.004) | |||||||
| Pan r magnitude | 16.75 (0.006) | 16.75 (0.006) | |||||||
| Pan i magnitude | 17.13 (0.002) | 17.13 (0.002) | |||||||
| Pan z magnitude | 17.43 (0.006) | 17.43 (0.006) | |||||||
| Pan y magnitude | 17.65 (0.01) | 17.65 (0.01) | |||||||
| E(B-V) | 0.019 | ||||||||
* 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.