All names: UCAC4 495-051099, GALEX J083919.2+085606, Gaia DR3 596634626009611392, TIC 458681225, SDSS J083919.24+085607.9, UCAC2 34837507, SDSS J083919.24+085607.8, 2MASS J08391925+0856079, WISE J083919.25+085608.2, Gaia EDR3 596634626009611392, GALEXJ08393+0856, WISEA J083919.25+085608.0, Gaia DR2 596634626009611392, SDSS J083919.25+085607.8
| Parameter | Unit | Gaia EDR3 | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|---|
| Right ascension | 08 39 19.25 (0.03) | 08 39 19.20 | 08 39 19.25 (0.03) | ||
| Declination | 08 56 07.85 (0.02) | 08 56 06.72 | 08 56 07.94 (0.02) | ||
| 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] | 1.37 (0.04) | 1.22 (0.06) | 1.37 (0.04) | |
| Distance | [pc] | 728.07 (20) | 818.46 (39) | 728.07 (20) | |
| Composition | |||||
| Proper motion (right ascension) | [mas/yr] | 2.06 (0.04) | 2.134 (0.1) | 2.06 (0.04) | |
| Proper motion (declination) | [mas/yr] | -5.538 (0.03) | -5.615 (0.06) | -5.538 (0.03) | |
| Variability | |||||
| Magnetic | |||||
| Bd | [MG] | ||||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 14.28 (0.09) | ||||
| V magnitude | 14.43 (0.01) | ||||
| R magnitude | 14.74 (0.1) | ||||
| I magnitude | |||||
| J magnitude | 15.06 (0.04) | 15.06 (0.04) | |||
| H magnitude | 15.20 (0.1) | 15.20 (0.1) | |||
| K magnitude | 15.54 (0.2) | 15.54 (0.2) | |||
| u magnitude | 14.05 (0.003) | ||||
| g magnitude | 14.19 (0.003) | 14.70 (0.8) | |||
| r magnitude | 14.64 (0.004) | 14.78 (0.07) | |||
| i magnitude | 14.96 (0.004) | 15.06 (0.01) | |||
| z magnitude | 15.25 (0.005) | ||||
| G magnitude | 14.42 (0.003) | 14.44 (0.0004) | 14.42 (0.003) | ||
| BP magnitude | 14.31 (0.003) | 14.26 (0.004) | |||
| RP magnitude | 14.65 (0.004) | 14.65 (0.002) | |||
| Pan g magnitude | 14.28 (0.008) | ||||
| Pan r magnitude | 14.65 (0.002) | ||||
| Pan i magnitude | 14.99 (0.003) | ||||
| Pan z magnitude | 15.25 (0.003) | ||||
| Pan y magnitude | 15.41 (0.004) | ||||
| E(B-V) | 0.030 | ||||
* 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.