WD 0018+004
All names: WD 0018+004, SDSS J002049.54+004433.9, TIC 293361488, SDSS J002049.55+004433.94, SDSS J002049.55+004433.9, SDSS J002049.39+004435.1, WDJ002049.41+004434.90, Gaia DR3 2546887573277984256, SDSS J002049.43+004434.8, USNO-B1.0 0907-00003855, Gaia DR2 2546887573277984256, LP 585-7, J0020+0044, PB 5879, SDSS J002049.38+004435.0, Gaia EDR3 2546887573277984256, SDSS J002049.39+004435.0, SDSS J002049.42+004434.7, GALEX J002049.4+004435, SDSS J002049.43+004434.7, LSPM J0020+0044, 2MASS J00204938+0044353, NLTT 1086
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | SDSS DR12 | Caron et al. 2023 | Kilic et al. 2020 | MWDD H | Gaia DR2 | Stilism | Kepler et al. 2015 | Tremblay et al. 2011 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Kleinman et al. 2004 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 00 20 49.61 (0.06) | 00 20 49.43 | 00 20 49.43 | 00 20 49.61 (0.08) | 00 20 49.61 | 00 20 49.41 (0.06) | 00 20 49.61 | 00 20 49.43 | 00 20 48.82 | 00 20 49.39 | 00 20 49.38 | |||||||||
| Declination | 00 44 33.56 (0.04) | 00 44 34.76 | 00 44 34.76 | 00 44 33.60 (0.05) | 00 44 33.56 | 00 44 34.90 (0.04) | 00 44 33.60 | 00 44 34.74 | 00 44 32.64 | 00 44 35.08 | 00 44 35.09 | |||||||||
| Spectral type | DA | DA | DA | DA | DA | DA | DA3 | DA | DA | DA5.5 | DA | DA | ||||||||
| Effective temperature | [K] | 8921.0 (48) | 8906.0 (62) | 8856.0 | 8803.0 (13) | 8930.0 (20) | 8687.0 (74) | 9160.0 (10) | 8807.0 (29) | 9182.0 (17) | ||||||||||
| log(g) | [cgs] | 8.46 (0.009) | 8.46 (0.01) | 8.46 | 8.41 (0.02) | 8.76 (0.03) | 8.43 (0.01) | 9.00 (0.003) | 8.61 (0.04) | 9.00 (0) | ||||||||||
| Mass | [M☉] | 0.895 (0.008) | 0.894 (0.01) | 0.888 | 0.846 (0.01) | 1.07 (0.01) | 0.869 (0.01) | |||||||||||||
| log(Luminosity) | [L☉] | |||||||||||||||||||
| Cooling age | [Gyr] | 1.9900 | 1.9150 | 2.8184 | ||||||||||||||||
| 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] | 21.25 (0.07) | 21.17 (0.1) | 21.17 (0.1) | 21.25 | 21.25 (0.07) | 21.17 (0.1) | |||||||||||||
| Distance | [pc] | 47.07 (0.2) | 47.24 (0.2) | 47.23 (0.2) | 47.07 | 47.07 (0.2) | 47.23 (0.2) | |||||||||||||
| Composition | H | H | H | |||||||||||||||||
| Proper motion (right ascension) | [mas/yr] | 192.6729278 (0.08) | 192.6533194 (0.2) | 192.673 (0.08) | 192.653 | 193.1 | 193.0 | |||||||||||||
| Proper motion (declination) | [mas/yr] | -83.89549958 (0.06) | -83.90720439 (0.1) | -83.895 (0.06) | -83.907 | -88.7 | -88.0 | |||||||||||||
| Variability | ||||||||||||||||||||
| Magnetic | ||||||||||||||||||||
| Bd | [MG] | |||||||||||||||||||
| Infrared excess (disk) | ||||||||||||||||||||
| Binarity | ||||||||||||||||||||
| B magnitude | 17.00 | |||||||||||||||||||
| V magnitude | ||||||||||||||||||||
| R magnitude | 16.70 | |||||||||||||||||||
| I magnitude | ||||||||||||||||||||
| J magnitude | 16.41 (0.009) | 16.34 (0.1) | ||||||||||||||||||
| H magnitude | 16.31 (0.03) | 16.30 (0.2) | ||||||||||||||||||
| K magnitude | 16.29 (0.03) | 16.13 (0.3) | ||||||||||||||||||
| u magnitude | 17.09 (0.008) | 17.09 (0.008) | 17.07 (0.009) | 17.09 (0.01) | 17.09 (0.008) | 17.06 (0.008) | 17.04 (0.02) | 17.02 | 17.03 (0.02) | 17.02 (0.04) | ||||||||||
| g magnitude | 16.71 (0.004) | 16.71 (0.004) | 16.73 (0.02) | 16.70 (0.004) | 16.72 (0.004) | 16.80 (0.03) | 16.77 | 16.79 (0.03) | 16.77 (0.03) | |||||||||||
| r magnitude | 16.72 (0.005) | 16.72 (0.005) | 16.71 (0.02) | 16.71 (0.005) | 16.72 (0.004) | 16.74 (0.03) | 16.74 | 16.72 (0.02) | 16.74 (0.03) | |||||||||||
| i magnitude | 16.79 (0.006) | 16.79 (0.006) | 16.79 (0.01) | 16.79 (0.006) | 16.77 (0.005) | 16.78 (0.01) | 16.78 | 16.77 (0.02) | 16.78 (0.01) | |||||||||||
| z magnitude | 16.89 (0.01) | 16.89 (0.01) | 16.87 (0.02) | 16.89 (0.01) | 16.91 (0.01) | 16.94 (0.02) | 16.93 | 16.91 (0.02) | 16.93 (0.02) | |||||||||||
| G magnitude | 16.67 (0.005) | 16.68 | 16.67 | 16.67 (0.003) | 16.68 | |||||||||||||||
| BP magnitude | 16.75 (0.005) | 16.75 | 16.75 | |||||||||||||||||
| RP magnitude | 16.49 (0.007) | 16.49 | 16.49 | |||||||||||||||||
| Pan g magnitude | 16.73 (0.004) | 16.73 (0.004) | ||||||||||||||||||
| Pan r magnitude | 16.74 (0.003) | 16.74 (0.003) | ||||||||||||||||||
| Pan i magnitude | 16.83 (0.004) | 16.83 (0.005) | ||||||||||||||||||
| Pan z magnitude | 16.93 (0.005) | 16.93 (0.005) | ||||||||||||||||||
| Pan y magnitude | 17.01 (0.01) | 17.01 (0.01) | ||||||||||||||||||
| E(B-V) | 0.001 | |||||||||||||||||||
* Constant surface field
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