WD 1720+556
All names: SDSS J172059.05+553505.9, Gaia EDR3 1420444434675945984, WD 1720+556, SDSS J172059.05+553505.8, Gaia DR2 1420444434675945984, GALEX J172058.9+553505, Gaia DR3 1420444434675945984
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | MWDD H | Gaia DR2 | Stilism | Simbad | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Kleinman et al. 2004 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 17 20 59.04 (0.3) | 17 20 59.05 | 17 20 59.04 (0.4) | 17 20 59.06 (0.3) | 17 20 59.06 | 17 20 58.63 | 17 20 59.05 | 17 20 59.05 | |||||
| Declination | 55 35 05.96 (0.4) | 55 35 05.89 | 55 35 05.96 (0.5) | 55 35 05.89 (0.4) | 55 35 05.83 | 55 35 02.04 | 55 35 05.85 | 55 35 05.86 | |||||
| Spectral type | DA | DA | DA | DA2.6 | DA | DA | |||||||
| Effective temperature | [K] | 27446.0 | 19091.0 (398) | 18591.0 (535) | 19142.0 (393) | ||||||||
| log(g) | [cgs] | 8.68 | 8.03 (0.07) | 8.00 (0.1) | 8.04 (0.07) | ||||||||
| Mass | [M☉] | 1.049 | |||||||||||
| log(Luminosity) | [L☉] | ||||||||||||
| Cooling age | [Gyr] | 0.1057 | |||||||||||
| log(H/He) | |||||||||||||
| log(C/He) | |||||||||||||
| log(Ca/He) | |||||||||||||
| log(Ca/H) | |||||||||||||
| log(C/H) | |||||||||||||
| log(N/H) | |||||||||||||
| log(O/H) | |||||||||||||
| log(Na/H) | |||||||||||||
| log(Mg/H) | |||||||||||||
| log(Al/H) | |||||||||||||
| log(Si/H) | |||||||||||||
| log(P/H) | |||||||||||||
| log(S/H) | |||||||||||||
| log(Sc/H) | |||||||||||||
| log(Ti/H) | |||||||||||||
| log(Cr/H) | |||||||||||||
| log(Mn/H) | |||||||||||||
| log(Fe/H) | |||||||||||||
| log(Ni/H) | |||||||||||||
| Parallax | [mas] | 1.69 (0.3) | 2.03 (0.4) | 1.69 (0.3) | |||||||||
| Distance | [pc] | 591.47 (118) | 493.02 (109) | 591.47 (118) | |||||||||
| Composition | H | ||||||||||||
| Proper motion (right ascension) | [mas/yr] | -7.032915929 (0.4) | -6.415132893 (0.9) | -7.033 (0.4) | -7.6 | -10.0 | |||||||
| Proper motion (declination) | [mas/yr] | 4.294590048 (0.5) | 4.648009185 (1) | 4.295 (0.5) | -4.8 | -3.0 | |||||||
| Variability | |||||||||||||
| Magnetic | |||||||||||||
| Bd | [MG] | ||||||||||||
| Infrared excess (disk) | |||||||||||||
| Binarity | |||||||||||||
| B magnitude | |||||||||||||
| V magnitude | |||||||||||||
| R magnitude | |||||||||||||
| I magnitude | |||||||||||||
| J magnitude | |||||||||||||
| H magnitude | |||||||||||||
| K magnitude | |||||||||||||
| u magnitude | 19.94 (0.03) | 19.94 (0.03) | 19.95 (0.04) | 19.94 | 19.95 (0.04) | 19.94 (0.04) | |||||||
| g magnitude | 19.76 (0.01) | 19.76 (0.01) | 19.77 (0.02) | 19.78 | 19.77 (0.02) | 19.78 (0.02) | |||||||
| r magnitude | 20.04 (0.02) | 20.04 (0.02) | 20.06 (0.03) | 20.06 | 20.05 (0.03) | 20.06 (0.03) | |||||||
| i magnitude | 20.35 (0.04) | 20.35 (0.04) | 20.36 (0.04) | 20.37 | 20.36 (0.04) | 20.37 (0.04) | |||||||
| z magnitude | 20.77 (0.2) | 20.77 (0.2) | 20.73 (0.2) | 20.77 | 20.73 (0.2) | 20.77 (0.2) | |||||||
| G magnitude | 19.92 (0.07) | 19.99 | 19.92 (0.006) | ||||||||||
| BP magnitude | 19.94 (0.07) | 19.87 | |||||||||||
| RP magnitude | 19.90 (0.09) | 19.99 | |||||||||||
| Pan g magnitude | 19.78 (0.02) | ||||||||||||
| Pan r magnitude | 20.07 (0.01) | ||||||||||||
| Pan i magnitude | 20.33 (0.02) | ||||||||||||
| Pan z magnitude | 20.65 (0.4) | ||||||||||||
| Pan y magnitude | |||||||||||||
| E(B-V) | 0.026 | ||||||||||||
* Constant surface field
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