All names: UCAC2 11655218, WISE J183924.12-470812.5, Gaia DR2 6705587204931977728, 2MASS J18392411-4708126, UCAC4 215-178787, DENIS J183924.1-470812, WISEA J183924.13-470812.6, GALEX J183924.1-470812, Gaia DR3 6705587204931977728, Gaia EDR3 6705399635115125632, GALEXJ18394-4708, TIC 339907982
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 18 39 30.47 (0.4) | 18 39 24.20 | 18 39 24.11 (0.03) | ||
| Declination | -47 08 41.17 (0.3) | -47 08 12.11 | -47 08 12.62 (0.03) | ||
| Spectral type | sdB | sdB | |||
| Effective temperature | [K] | ||||
| log(g) | [cgs] | ||||
| Mass | [M☉] | ||||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | ||||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| log(Ca/H) | |||||
| Parallax | [mas] | 1.35 (0.4) | 0.96 (0.08) | 0.84 (0.04) | |
| Distance | [pc] | 738.93 (234) | 1046.90 (92) | 1185.82 (55) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | -2.77 (0.4) | -1.273 (0.1) | -1.114 (0.04) | |
| Proper motion (declination) | [mas/yr] | -5.673 (0.4) | -8.137 (0.1) | -7.997 (0.03) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 14.36 (0.08) | ||||
| V magnitude | 14.61 (0.02) | ||||
| R magnitude | 14.77 (0.08) | ||||
| I magnitude | 14.73 (0.08) | ||||
| J magnitude | 15.03 (0.04) | 15.03 (0.04) | |||
| H magnitude | 15.11 (0.08) | 15.11 (0.08) | |||
| K magnitude | 15.16 (0.1) | 15.16 (0.1) | |||
| u magnitude | |||||
| g magnitude | 14.37 (0.06) | ||||
| r magnitude | 14.82 (0.02) | ||||
| i magnitude | 14.90 (0.01) | ||||
| z magnitude | |||||
| G magnitude | 19.65 (0.005) | 14.56 (0.0009) | 14.54 (0.003) | ||
| BP magnitude | 20.09 (0.07) | 14.33 (0.01) | |||
| RP magnitude | 19.33 (0.05) | 14.76 (0.004) | |||
| Pan g magnitude | |||||
| Pan r magnitude | |||||
| Pan i magnitude | |||||
| Pan z magnitude | |||||
| Pan y magnitude | |||||
| E(B-V) | 0.054 | ||||
* 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.