All names: SDSS J153931.44+015409.5, GALEX J153931.4+015409, Gaia DR3 4423768112463703680, 2MASS J15393144+0154095, SDSSJ153931.45+015409.5, Gaia DR2 4423768112463703680, TIC 459389049
| Parameter | Unit | Geier 2020 | Simbad |
|---|---|---|---|
| Right ascension | 15 39 31.45 | 15 39 31.45 (0.04) | |
| Declination | 01 54 09.50 | 01 54 09.52 (0.04) | |
| 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] | -0.18 (0.1) | 0.14 (0.06) |
| Distance | [pc] | 6925.21 (2710) | |
| Composition | |||
| Proper motion (right ascension) | [mas/yr] | -2.447 (0.2) | -2.431 (0.06) |
| Proper motion (declination) | [mas/yr] | -7.756 (0.2) | -8.018 (0.05) |
| Variability | |||
| Magnetic | |||
| Bd | [MG] | ||
| Infrared excess (disk) | |||
| Binarity | |||
| B magnitude | |||
| V magnitude | |||
| R magnitude | |||
| I magnitude | |||
| J magnitude | 16.27 (0.09) | 16.31 (0.01) | |
| H magnitude | 16.08 | 16.31 (0.02) | |
| K magnitude | 15.54 | 16.40 (0.04) | |
| u magnitude | 16.27 (0.006) | 16.27 (0.006) | |
| g magnitude | 15.92 (0.004) | 15.92 (0.004) | |
| r magnitude | 16.25 (0.004) | 16.25 (0.004) | |
| i magnitude | 16.48 (0.005) | 16.48 (0.005) | |
| z magnitude | 16.70 (0.01) | 16.70 (0.01) | |
| G magnitude | 16.11 (0.001) | 16.09 (0.003) | |
| BP magnitude | 16.03 (0.006) | ||
| RP magnitude | 16.16 (0.005) | ||
| Pan g magnitude | 15.98 (0.005) | ||
| Pan r magnitude | 16.26 (0.003) | ||
| Pan i magnitude | 16.50 (0.002) | ||
| Pan z magnitude | 16.70 (0.002) | ||
| Pan y magnitude | 16.79 (0.01) | ||
| E(B-V) | |||
* 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.