All names: GALEX J004740.4+312355, 2MASS J00474050+3123555, UCAC4 607-002189, SDSS J004740.51+312355.3, LAMOST J004740.51+312355.5, Gaia DR2 360511037906831872, Gaia DR3 360511037906831872, GALEXJ00476+3123
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 00 47 40.44 | 00 47 40.51 (0.03) | ||
| Declination | 31 23 55.08 | 31 23 55.42 (0.02) | ||
| Spectral type | sdB | sdB | ||
| Effective temperature | [K] | 30990.0 (280) | ||
| log(g) | [cgs] | 5.75 (0.04) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 1.01 (0.06) | 1.04 (0.04) | |
| Distance | [pc] | 993.94 (58) | 963.02 (36) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 1.887 (0.09) | 1.895 (0.04) | |
| Proper motion (declination) | [mas/yr] | -2.469 (0.08) | -2.303 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 14.64 (0.09) | |||
| V magnitude | 14.78 (0.08) | |||
| R magnitude | 15.00 (0.01) | |||
| I magnitude | ||||
| J magnitude | 15.28 (0.05) | 15.28 (0.05) | ||
| H magnitude | 15.40 (0.1) | 15.40 (0.1) | ||
| K magnitude | 15.09 (0.1) | 15.09 (0.1) | ||
| u magnitude | 14.43 (0.003) | 14.43 (0.003) | ||
| g magnitude | 14.58 (0.003) | 14.61 (0.07) | ||
| r magnitude | 15.00 (0.003) | 15.04 (0.08) | ||
| i magnitude | 15.28 (0.004) | 15.31 (0.1) | ||
| z magnitude | 15.55 (0.005) | 15.55 (0.005) | ||
| G magnitude | 14.81 (0.0005) | 14.80 (0.003) | ||
| BP magnitude | 14.65 (0.007) | |||
| RP magnitude | 14.99 (0.002) | |||
| Pan g magnitude | 14.66 (0.002) | |||
| Pan r magnitude | 15.04 (0.006) | |||
| Pan i magnitude | 15.33 (0.0007) | |||
| Pan z magnitude | 15.56 (0.003) | |||
| Pan y magnitude | 15.69 (0.004) | |||
| E(B-V) | 0.053 | |||
* 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.