All names: LB 720, SDSS J140747.84+235424.3, 2MASS J14074785+2354242, WISE J140747.85+235424.3, WISEA J140747.84+235424.3, GALEX J140747.8+235424, PG1405+241, Gaia DR2 1257145727928011904, UCAC4 570-051405, Ton 185, TIC 98464893, PG 1405+241, Gaia DR3 1257145727928011904
| Parameter | Unit | Geier 2020 | Stilism | Simbad |
|---|---|---|---|---|
| Right ascension | 14 07 47.86 | 14 07 47.85 (0.03) | ||
| Declination | 23 54 24.54 | 23 54 24.34 (0.03) | ||
| Spectral type | sdOB+MS | sdB+A/F | ||
| 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] | 0.30 (0.07) | 0.37 (0.05) | |
| Distance | [pc] | 3317.85 (766) | 2678.09 (328) | |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | -4.734 (0.2) | -4.501 (0.05) | |
| Proper motion (declination) | [mas/yr] | -3.303 (0.1) | -2.837 (0.04) | |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 16.28 (0.04) | |||
| V magnitude | 16.27 (0.01) | |||
| R magnitude | ||||
| I magnitude | ||||
| J magnitude | 15.52 (0.06) | 15.52 (0.06) | ||
| H magnitude | 15.15 (0.08) | 15.15 (0.08) | ||
| K magnitude | 15.09 (0.1) | 15.09 (0.1) | ||
| u magnitude | 15.87 (0.005) | 15.87 (0.005) | ||
| g magnitude | 16.05 (0.004) | 16.05 (0.004) | ||
| r magnitude | 16.26 (0.004) | 16.26 (0.004) | ||
| i magnitude | 16.31 (0.004) | 16.31 (0.004) | ||
| z magnitude | 16.37 (0.008) | 16.37 (0.008) | ||
| G magnitude | 16.12 (0.002) | 16.09 (0.003) | ||
| BP magnitude | 16.07 (0.01) | |||
| RP magnitude | 15.98 (0.007) | |||
| Pan g magnitude | 16.13 (0.003) | |||
| Pan r magnitude | 16.27 (0.004) | |||
| Pan i magnitude | 16.34 (0.004) | |||
| Pan z magnitude | 16.39 (0.006) | |||
| Pan y magnitude | 16.38 (0.007) | |||
| E(B-V) | 0.020 | |||
* 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.