WD 1440+006
All names: LBQS 1440+0039, WD 1440+006, WDJ144244.18+002714.84, Gaia DR3 3651747667992161920, SDSS J144244.19+002714.8, SDSS J144244.18+002714.8, J1442+0027, Gaia EDR3 3651747667992161920, Gaia DR2 3651747667992161920
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Kilic et al. 2025 | Caron et al. 2023 | Kilic et al. 2020 | MWDD H | Gaia DR2 | Stilism | 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 | 14 42 44.09 (0.1) | 14 42 44.19 | 14 42 44.09 (0.2) | 14 42 44.09 | 14 42 44.18 (0.1) | 14 42 44.09 | 14 42 44.19 | 14 42 43.34 | 14 42 44.19 | 14 42 44.19 | ||||||||
| Declination | 00 27 15.23 (0.1) | 00 27 14.82 | 00 27 15.21 (0.2) | 00 27 15.23 | 00 27 14.84 (0.1) | 00 27 15.21 | 00 27 14.80 | 00 27 10.44 | 00 27 14.84 | 00 27 14.83 | ||||||||
| Spectral type | DA | DAH: | DA+DC? | DA | DA | DA | DA | DA | DA6.1 | DA | DA | |||||||
| Effective temperature | [K] | 8065.0 (81) | 8266.0 (75) | 8063.0 (81) | 7994.0 | 8061.0 (197) | 8211.0 (32) | 7809.0 (41) | 8254.0 (31) | |||||||||
| log(g) | [cgs] | 8.27 (0.02) | 8.34 (0.02) | 8.28 (0.02) | 8.27 | 8.26 (0.04) | 8.99 (0.02) | 8.50 (0.07) | 9.00 (0.01) | |||||||||
| Mass | [M☉] | 0.765 (0.02) | 0.812 (0.02) | 0.774 (0.02) | 0.764 | 0.76 (0.04) | ||||||||||||
| log(Luminosity) | [L☉] | |||||||||||||||||
| Cooling age | [Gyr] | 1.8300 | 1.7050 | |||||||||||||||
| 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] | 11.99 (0.2) | 12.13 (0.2) | 12.13 (0.2) | 11.99 | 11.99 (0.2) | 12.13 (0.2) | |||||||||||
| Distance | [pc] | 83.39 (1) | 82.44 (1) | 82.46 (2) | 83.39 | 83.39 (1) | 82.46 (2) | |||||||||||
| Composition | H | H | H | |||||||||||||||
| Proper motion (right ascension) | [mas/yr] | -89.50555912 (0.1) | -89.1227703 (0.3) | -89.506 (0.1) | -89.123 | -89.5 | -88.0 | |||||||||||
| Proper motion (declination) | [mas/yr] | 24.39252452 (0.1) | 24.24889117 (0.3) | 24.393 (0.1) | 24.249 | 25.1 | 24.0 | |||||||||||
| Variability | ||||||||||||||||||
| Magnetic | ||||||||||||||||||
| Bd | [MG] | |||||||||||||||||
| Infrared excess (disk) | ||||||||||||||||||
| Binarity | ||||||||||||||||||
| B magnitude | ||||||||||||||||||
| V magnitude | ||||||||||||||||||
| R magnitude | ||||||||||||||||||
| I magnitude | ||||||||||||||||||
| J magnitude | 17.55 (0.03) | 17.54 (0.03) | ||||||||||||||||
| H magnitude | 17.49 (0.05) | 17.49 (0.05) | ||||||||||||||||
| K magnitude | 17.45 (0.09) | 17.45 (0.09) | ||||||||||||||||
| u magnitude | 18.44 (0.01) | 18.44 (0.01) | 18.44 (0.01) | 18.44 (0.01) | 18.42 (0.02) | 18.41 | 18.43 (0.02) | 18.41 (0.02) | ||||||||||
| g magnitude | 18.02 (0.006) | 18.02 (0.006) | 18.02 (0.006) | 18.02 (0.02) | 18.02 | 18.03 (0.02) | 18.02 (0.02) | |||||||||||
| r magnitude | 17.97 (0.007) | 17.97 (0.007) | 17.97 (0.007) | 17.96 (0.02) | 17.96 | 17.96 (0.02) | 17.96 (0.02) | |||||||||||
| i magnitude | 18.02 (0.008) | 18.02 (0.008) | 18.02 (0.008) | 18.00 (0.02) | 18.00 | 18.01 (0.02) | 18.00 (0.02) | |||||||||||
| z magnitude | 18.14 (0.02) | 18.14 (0.02) | 18.14 (0.02) | 18.12 (0.02) | 18.12 | 18.14 (0.02) | 18.12 (0.02) | |||||||||||
| G magnitude | 17.93 (0.01) | 17.96 | 17.93 | 17.93 (0.003) | 17.96 | |||||||||||||
| BP magnitude | 18.06 (0.01) | 18.07 | 18.07 | |||||||||||||||
| RP magnitude | 17.68 (0.01) | 17.70 | 17.70 | |||||||||||||||
| Pan g magnitude | 18.04 (0.009) | 18.04 (0.008) | ||||||||||||||||
| Pan r magnitude | 17.97 (0.01) | 17.97 (0.01) | ||||||||||||||||
| Pan i magnitude | 18.02 (0.004) | 18.02 (0.004) | ||||||||||||||||
| Pan z magnitude | 18.09 (0.02) | 18.09 (0.02) | ||||||||||||||||
| Pan y magnitude | 18.17 (0.02) | 18.17 (0.02) | ||||||||||||||||
| E(B-V) | 0.008 | |||||||||||||||||
* Constant surface field
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