All names: LAMOST J040047.29+171842.0, TIC 242992862, SDSS J040047.29+171841.9, 2MASS J04004728+1718419, Gaia DR3 46608061680943872, UCAC4 537-007609, LAMOSTJ040047.29+171842.0, Gaia DR2 46608061680943872
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 04 00 47.29 | 04 00 47.30 (0.04) | ||
| Declination | 17 18 42.09 | 17 18 41.94 (0.03) | ||
| Spectral type | sdB | sdB | ||
| Effective temperature | [K] | 28750.0 (290) | ||
| log(g) | [cgs] | 5.57 (0.04) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.79 (0.05) | 0.78 (0.04) | |
| Distance | [pc] | 1269.20 (80) | 1285.84 (66) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -0.829 (0.1) | -0.778 (0.05) | |
| Proper motion (declination) | [mas/yr] | 7.994 (0.06) | 7.871 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.65 (0.06) | |||
| V magnitude | 15.44 (0.03) | |||
| R magnitude | 15.63 (0.2) | |||
| I magnitude | ||||
| J magnitude | 15.21 (0.05) | 15.21 (0.05) | ||
| H magnitude | 15.26 (0.1) | 15.26 (0.1) | ||
| K magnitude | 15.14 (0.2) | 15.14 (0.2) | ||
| u magnitude | 15.65 (0.005) | 15.65 (0.005) | ||
| g magnitude | 15.42 (0.004) | 15.42 (0.004) | ||
| r magnitude | 15.51 (0.004) | 15.51 (0.004) | ||
| i magnitude | 15.62 (0.005) | 15.62 (0.005) | ||
| z magnitude | 15.74 (0.006) | 15.74 (0.006) | ||
| G magnitude | 15.45 (0.0005) | 15.43 (0.003) | ||
| BP magnitude | 15.46 (0.004) | |||
| RP magnitude | 15.30 (0.003) | |||
| Pan g magnitude | 15.49 (0.005) | |||
| Pan r magnitude | 15.53 (0.002) | |||
| Pan i magnitude | 15.65 (0.003) | |||
| Pan z magnitude | 15.77 (0.004) | |||
| Pan y magnitude | 15.83 (0.004) | |||
| E(B-V) | 0.295 | |||
* 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.