All names: SDSS J155610.40+254640.2, Gaia DR3 1220049614357436544, SDSS J155610.40+254640.30, SDSS J155610.40+254640.3, Gaia EDR3 1220049614357436544, LAMOST J155610.40+254640.3, GALEX J155610.4+254639, Gaia DR2 1220049614357436544
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad |
|---|---|---|---|---|---|---|---|---|
| Right ascension | 15 56 10.40 (0.05) | 15 56 10.41 | 15 56 10.40 (0.07) | 15 56 10.41 (0.05) | ||||
| Declination | 25 46 40.24 (0.07) | 25 46 40.24 | 25 46 40.24 (0.09) | 25 46 40.26 (0.07) | ||||
| Spectral type | He-sdO | sdOHe | ||||||
| Effective temperature | [K] | 100000.0 (9000) | ||||||
| log(g) | [cgs] | 5.00 (0.01) | ||||||
| Mass | [M☉] | |||||||
| log(Luminosity) | [L☉] | |||||||
| Cooling age | [Gyr] | |||||||
| log(H/He) | ||||||||
| log(C/He) | ||||||||
| log(Ca/He) | ||||||||
| log(Ca/H) | ||||||||
| Parallax | [mas] | 0.09 (0.1) | 0.04 (0.1) | 0.09 (0.1) | ||||
| Distance | [pc] | 11645.45 (13337) | 27222.32 (94613) | 11641.44 (13322) | ||||
| Composition | ||||||||
| Proper motion (right ascension) | [mas/yr] | -5.60864821 (0.06) | -5.545771239 (0.2) | -5.609 (0.06) | ||||
| Proper motion (declination) | [mas/yr] | -1.30871545 (0.1) | -1.270662997 (0.2) | -1.309 (0.1) | ||||
| Variability | ||||||||
| Magnetic | ||||||||
| Bd | [MG] | |||||||
| Infrared excess (disk) | ||||||||
| Binarity | ||||||||
| B magnitude | ||||||||
| V magnitude | ||||||||
| R magnitude | ||||||||
| I magnitude | ||||||||
| J magnitude | 18.72 (0.06) | |||||||
| H magnitude | 18.90 (0.2) | |||||||
| K magnitude | ||||||||
| u magnitude | 17.24 (0.009) | 17.25 (0.01) | 17.24 (0.009) | |||||
| g magnitude | 17.67 (0.006) | 17.71 (0.01) | 17.68 (0.006) | |||||
| r magnitude | 18.14 (0.007) | 18.13 (0.02) | 18.14 (0.007) | |||||
| i magnitude | 18.52 (0.01) | 18.51 (0.03) | 18.52 (0.01) | |||||
| z magnitude | 18.86 (0.03) | 18.87 (0.04) | 18.86 (0.03) | |||||
| G magnitude | 17.91 (0.005) | 17.94 | 17.91 (0.003) | |||||
| BP magnitude | 17.77 (0.005) | 17.68 | ||||||
| RP magnitude | 18.20 (0.01) | 18.21 | ||||||
| Pan g magnitude | 17.72 (0.003) | |||||||
| Pan r magnitude | 18.17 (0.007) | |||||||
| Pan i magnitude | 18.53 (0.006) | |||||||
| Pan z magnitude | 18.80 (0.01) | |||||||
| Pan y magnitude | 19.07 (0.06) | |||||||
| E(B-V) | 0.043 | |||||||
* 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.