All names: 2MASS J08034631+3045044, Gaia DR2 877744947113226880, SDSS J080346.30+304504.3, LAMOSTJ080346.30+304504.3, WISE J080346.31+304504.3, Gaia DR3 877744947113226880, UCAC4 604-042878, LAMOST J080346.30+304504.3, GALEX J080346.3+304504
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 08 03 46.30 | 08 03 46.30 (0.03) | ||
| Declination | 30 45 04.33 | 30 45 04.37 (0.02) | ||
| Spectral type | sdB | sdB/sdO | ||
| Effective temperature | [K] | 20991.0 (34) | ||
| log(g) | [cgs] | 5.05 (0.03) | ||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 0.30 (0.09) | 0.25 (0.04) | |
| Distance | [pc] | 3333.33 (986) | 3985.65 (627) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 0.455 (0.1) | 0.319 (0.04) | |
| Proper motion (declination) | [mas/yr] | -3.566 (0.07) | -3.455 (0.03) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 15.07 (0.05) | |||
| V magnitude | 15.21 (0.1) | |||
| R magnitude | 15.39 (0.1) | |||
| I magnitude | ||||
| J magnitude | 15.58 (0.07) | 15.58 (0.07) | ||
| H magnitude | 15.18 (0.09) | 15.18 (0.09) | ||
| K magnitude | 15.34 (0.2) | 15.34 (0.2) | ||
| u magnitude | 15.40 (0.006) | |||
| g magnitude | 15.07 (0.004) | 15.06 (0.05) | ||
| r magnitude | 15.55 (0.004) | 15.39 (0.09) | ||
| i magnitude | 15.73 (0.006) | 15.71 (0.2) | ||
| z magnitude | 15.92 (0.008) | |||
| G magnitude | 15.20 (0.0008) | 15.18 (0.003) | ||
| BP magnitude | 15.07 (0.006) | |||
| RP magnitude | 15.31 (0.003) | |||
| Pan g magnitude | 15.03 (0.004) | |||
| Pan r magnitude | 15.36 (0.001) | |||
| Pan i magnitude | 15.65 (0.002) | |||
| Pan z magnitude | 15.85 (0.004) | |||
| Pan y magnitude | 15.96 (0.009) | |||
| E(B-V) | 0.037 | |||
* 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.