WD 1540+027
All names: Gaia DR3 4423916301719101312, GALEX J154250.1+023511, SDSS J154250.09+023510.9, Gaia EDR3 4423916301719101312, WD 1540+027, SDSS J154250.09+023511.4, SDSS J154250.08+023511.3, Gaia DR2 4423916301719101312, SDSS J154250.09+023511.3
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | MWDD H | MWDD HE | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 15 42 50.09 (0.3) | 15 42 50.09 | 15 42 50.09 (0.5) | 15 42 50.09 (0.3) | 15 42 50.09 | 15 42 50.21 | 15 42 50.09 | ||||||
| Declination | 02 35 10.75 (0.3) | 02 35 11.31 | 02 35 10.77 (0.4) | 02 35 11.39 (0.3) | 02 35 11.34 | 02 35 06.72 | 02 35 11.36 | ||||||
| Spectral type | DC | DC | DC | DC | DC | DC | DC: | ||||||
| Effective temperature | [K] | 9883.0 | 9745.0 | 11356.0 (466) | 10966.0 (506) | ||||||||
| log(g) | [cgs] | 8.30 | 8.22 | 8.70 (0.3) | 8.92 (0.7) | ||||||||
| Mass | [M☉] | 0.786 | 0.717 | ||||||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | 0.9675 | 0.9202 | ||||||||||
| log(H/He) | |||||||||||||
| log(C/He) | |||||||||||||
| log(Ca/He) | |||||||||||||
| log(Ca/H) | |||||||||||||
| Parallax | [mas] | 3.55 (0.5) | 4.28 (0.8) | 3.55 (0.5) | |||||||||
| Distance | [pc] | 281.98 (40) | 233.66 (44) | 281.98 (40) | |||||||||
| Composition | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | 1.356438286 (0.4) | 1.930431829 (1) | 1.356 (0.4) | 9.4 | ||||||||
| Proper motion (declination) | [mas/yr] | -40.08636591 (0.4) | -40.78290466 (1) | -40.086 (0.4) | -43.4 | ||||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | |||||||||||||
| V magnitude | |||||||||||||
| R magnitude | |||||||||||||
| I magnitude | |||||||||||||
| J magnitude | |||||||||||||
| H magnitude | |||||||||||||
| K magnitude | |||||||||||||
| u magnitude | 19.67 (0.03) | 19.67 (0.03) | 19.64 (0.04) | 19.60 | 19.61 (0.04) | ||||||||
| g magnitude | 19.51 (0.01) | 19.51 (0.01) | 19.48 (0.02) | 19.48 | 19.47 (0.02) | ||||||||
| r magnitude | 19.57 (0.02) | 19.57 (0.02) | 19.61 (0.02) | 19.61 | 19.61 (0.02) | ||||||||
| i magnitude | 19.73 (0.02) | 19.73 (0.03) | 19.76 (0.02) | 19.76 | 19.76 (0.02) | ||||||||
| z magnitude | 19.81 (0.08) | 19.82 (0.09) | 19.86 (0.09) | 19.85 | 19.87 (0.09) | ||||||||
| G magnitude | 19.50 (0.06) | 19.55 | 19.50 (0.005) | ||||||||||
| BP magnitude | 19.61 (0.06) | 19.60 | |||||||||||
| RP magnitude | 19.41 (0.07) | 19.42 | |||||||||||
| Pan g magnitude | 19.52 (0.008) | ||||||||||||
| Pan r magnitude | 19.58 (0.009) | ||||||||||||
| Pan i magnitude | 19.72 (0.008) | ||||||||||||
| Pan z magnitude | 19.87 (0.03) | ||||||||||||
| Pan y magnitude | 20.04 (0.07) | ||||||||||||
| E(B-V) | 0.046 | ||||||||||||
* Constant surface field
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