All names: SDSS J155550.39+403853.92, FBS B 127, TIC 29386006, Gaia DR3 1383048811559130240, FBS 1554+408, PG 1554+408, SDSS J155550.39+403853.9, 2MASS J15555038+4038537, LAMOST J155550.48+403854.6, Gaia EDR3 1383048811559130240, GALEX J155550.4+403854, Gaia DR2 1383048807264506496, PG1554+408
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 15 55 50.39 (0.04) | 15 55 50.39 | 15 55 50.40 | 15 55 50.39 (0.04) | 15 55 50.39 (0.04) | ||||
| Declination | 40 38 53.86 (0.04) | 40 38 53.91 | 40 38 53.94 | 40 38 53.86 (0.05) | 40 38 53.90 (0.04) | ||||
| Spectral type | He-sdB | He-sdB | sdBN0.2VIIHe39 | ||||||
| Effective temperature | [K] | 45818.0 (42) | |||||||
| log(g) | [cgs] | 7.00 (0.05) | |||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.26 (0.05) | 0.34 (0.05) | 0.34 (0.05) | 0.26 (0.05) | ||||
| Distance | [pc] | 3792.48 (704) | 2984.18 (473) | 2983.86 (473) | 3792.19 (703) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -2.554470261 (0.05) | -2.492 (0.09) | -2.491536951 (0.09) | -2.554 (0.05) | ||||
| Proper motion (declination) | [mas/yr] | -2.228746693 (0.06) | -2.357 (0.1) | -2.357262923 (0.1) | -2.229 (0.06) | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 15.93 | ||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | 16.76 (0.2) | 16.76 (0.2) | |||||||
| H magnitude | 16.38 | ||||||||
| K magnitude | 15.98 | ||||||||
| u magnitude | 15.67 (0.005) | 15.67 (0.005) | 15.71 (0.02) | 15.67 (0.005) | |||||
| g magnitude | 15.99 (0.003) | 15.99 (0.003) | 16.03 (0.02) | 15.99 (0.003) | |||||
| r magnitude | 16.55 (0.004) | 16.55 (0.004) | 16.56 (0.02) | 16.55 (0.004) | |||||
| i magnitude | 16.89 (0.005) | 16.89 (0.005) | 16.91 (0.02) | 16.89 (0.005) | |||||
| z magnitude | 17.19 (0.01) | 17.19 (0.01) | 17.19 (0.04) | 17.19 (0.01) | |||||
| G magnitude | 16.29 (0.003) | 16.30 (0.002) | 16.30 | 16.29 (0.003) | |||||
| BP magnitude | 16.12 (0.003) | 16.03 (0.01) | 16.03 | ||||||
| RP magnitude | 16.59 (0.006) | 16.59 (0.005) | 16.59 | ||||||
| Pan g magnitude | 16.11 (0.008) | 16.11 (0.008) | |||||||
| Pan r magnitude | 16.55 (0.003) | 16.55 (0.003) | |||||||
| Pan i magnitude | 16.91 (0.003) | 16.91 (0.003) | |||||||
| Pan z magnitude | 17.21 (0.004) | 17.21 (0.004) | |||||||
| Pan y magnitude | 17.42 (0.009) | 17.42 (0.009) | |||||||
| E(B-V) | 0.021 | ||||||||
* 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.