All names: GALEX J001843.5+010125, UCAC4 456-000395, SDSS J001843.51+010123.6, FBS 0016+007, LAMOST J001843.51+010123.5, UCAC2 32134602, SDSS J001843.51+010123.5, Gaia EDR3 2547139876837313920, HE 0016+0044, HS0016+0044, Gaia DR3 2547139876837313920, Gaia DR2 2547139876837313920, TIC 293342656, HS 0016+0044, 2MASS J00184351+0101238
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Geier 2020 | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 00 18 43.52 (0.04) | 00 18 43.51 | 00 18 43.51 | 00 18 43.52 (0.06) | 00 18 43.52 (0.04) | 00 18 43.52 | |||
| Declination | 01 01 23.47 (0.03) | 01 01 23.59 | 01 01 24.44 | 01 01 23.47 (0.04) | 01 01 23.63 (0.03) | 01 01 23.63 | |||
| Spectral type | sdB | sdB1.5VIIHe2 | SD_auto | ||||||
| Effective temperature | [K] | 28264.0 (500) | 28475.0 (161) | ||||||
| log(g) | [cgs] | 5.38 (0.05) | 5.00 (0.002) | ||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.62 (0.04) | 0.58 (0.09) | 0.58 (0.09) | 0.62 (0.04) | ||||
| Distance | [pc] | 1616.43 (117) | 1723.84 (268) | 1723.91 (268) | 1616.55 (117) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | 2.352649194 (0.06) | 3.052 (0.2) | 3.0521847 (0.2) | 2.353 (0.06) | 2.3 | |||
| Proper motion (declination) | [mas/yr] | -10.33711879 (0.04) | -10.174 (0.1) | -10.17409122 (0.1) | -10.337 (0.04) | -10.7 | |||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 14.75 (0.04) | ||||||||
| V magnitude | 14.88 (0.01) | ||||||||
| R magnitude | 15.13 (0.09) | ||||||||
| I magnitude | |||||||||
| J magnitude | 15.05 (0.04) | 15.05 (0.003) | |||||||
| H magnitude | 14.88 (0.05) | 14.85 (0.008) | |||||||
| K magnitude | 14.71 (0.07) | 14.87 (0.01) | |||||||
| u magnitude | 14.52 (0.004) | 14.52 (0.004) | 14.52 (0.004) | 14.54 (0.02) | |||||
| g magnitude | 14.65 (0.003) | 14.65 (0.003) | 14.65 (0.003) | 14.72 (0.02) | |||||
| r magnitude | 15.08 (0.004) | 15.08 (0.004) | 15.08 (0.004) | 15.07 (0.02) | |||||
| i magnitude | 15.34 (0.004) | 15.34 (0.004) | 15.34 (0.004) | 15.35 (0.01) | |||||
| z magnitude | 15.55 (0.006) | 15.54 (0.006) | 15.54 (0.006) | 15.55 (0.03) | |||||
| G magnitude | 14.86 (0.001) | 14.87 (0.0005) | 14.87 | 14.86 (0.003) | |||||
| BP magnitude | 14.75 (0.001) | 14.71 (0.005) | 14.71 | ||||||
| RP magnitude | 15.04 (0.001) | 15.04 (0.002) | 15.04 | ||||||
| Pan g magnitude | 14.75 (0.007) | 14.75 (0.007) | |||||||
| Pan r magnitude | 15.10 (0.001) | 15.10 (0.001) | |||||||
| Pan i magnitude | 15.39 (0.004) | 15.39 (0.004) | |||||||
| Pan z magnitude | 15.57 (0.004) | 15.57 (0.004) | |||||||
| Pan y magnitude | 15.69 (0.008) | 15.69 (0.008) | |||||||
| E(B-V) | 0.027 | ||||||||
* 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.