All names: 2MASS J20341048-1108021, UCAC2 27935744, WISE J203410.49-110802.1, DENIS J203410.4-110801, GALEX J203410.5-110801, TIC 9494769, LB 349, UCAC4 395-123864, GALEXJ20341-1108, Gaia DR3 6901505848986447616, Gaia DR2 6901505848986447616, Gaia EDR3 6901505848986447616, WISEA J203410.49-110802.2
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 20 34 10.49 (0.03) | 20 34 10.53 | 20 34 10.49 (0.03) | ||
| Declination | -11 08 02.22 (0.03) | -11 08 01.06 | -11 08 02.19 (0.03) | ||
| Spectral type | sdO | sdO | |||
| 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] | 1.14 (0.04) | 1.17 (0.06) | 1.14 (0.04) | |
| Distance | [pc] | 874.89 (32) | 851.50 (47) | 874.89 (32) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 5.209 (0.04) | 5.231 (0.1) | 5.209 (0.04) | |
| Proper motion (declination) | [mas/yr] | -1.641 (0.03) | -1.763 (0.06) | -1.641 (0.03) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 13.38 (0.01) | ||||
| V magnitude | 13.69 (0.01) | ||||
| R magnitude | 13.88 (0.1) | ||||
| I magnitude | 13.92 (0.02) | ||||
| J magnitude | 14.25 (0.03) | 14.25 (0.03) | |||
| H magnitude | 14.37 (0.06) | 14.37 (0.06) | |||
| K magnitude | 14.69 (0.1) | 14.69 (0.1) | |||
| u magnitude | |||||
| g magnitude | 13.37 (0.01) | ||||
| r magnitude | 13.87 (0.04) | ||||
| i magnitude | 14.23 (0.02) | ||||
| z magnitude | |||||
| G magnitude | 13.58 (0.003) | 13.60 (0.0008) | 13.58 (0.003) | ||
| BP magnitude | 13.42 (0.003) | 13.36 (0.009) | |||
| RP magnitude | 13.90 (0.004) | 13.89 (0.001) | |||
| Pan g magnitude | 13.46 | ||||
| Pan r magnitude | 13.89 (0.007) | ||||
| Pan i magnitude | 14.24 (0.002) | ||||
| Pan z magnitude | 14.52 (0.002) | ||||
| Pan y magnitude | 14.72 (0.004) | ||||
| E(B-V) | 0.058 | ||||
* 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.