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Table 5.
WD2015 best fit solutions for the TESS light curves of the α Dra system.
| Parameter | Unit | Part 1 | Part 2 | Adopted |
|---|---|---|---|---|
| Sectors 14, 15, 16 | Sectors 21, 22 | solution | ||
| Orbital elements | ||||
| Orbital period P | [d] | 51.4198 ± 0.0031 | 51.4200 ± 0.0032 | 51.4199 ± 0.0031 |
| Time of periastron Tpp | [d] | 2458753.107 ± 0.019 | 2458753.118 ± 0.026 | 2458753.112 ± 0.023 |
| Eccentricity e | 0.4230 ± 0.0013 | 0.4217 ± 0.0026 | 0.4223 ± 0.0021 | |
| Argument of periastron ω | [deg] | 20.74 ± 0.53 | 20.27 ± 0.78 | 20.51 ± 0.67 |
| Orbital inclination i | [deg] | 86.345 ± 0.024 | 86.358 ± 0.026 | 86.352 ± 0.025 |
| Stars | ||||
| Surface potential of star A ΩA | 22.22 ± 0.14 | 22.32 ± 0.16 | 22.27 ± 0.15 | |
| Surface potential of star B ΩB | 36.21 ± 0.80 | 35.90 ± 0.95 | 36.06 ± 0.88 | |
| Fractional radius of star A rA | 0.0479 ± 0.0003 | 0.0476 ± 0.0004 | 0.0477 ± 0.0003 | |
| Fractional radius of star B rB | 0.0224 ± 0.0005 | 0.0226 ± 0.0006 | 0.0225 ± 0.0005 | |
| Eff. temperature of star A Teff, A | [K] | 10 225 (fix) | 10 225 (fix) | 10 225 (fix) |
| Eff. temperature of star B Teff, B | [K] | 10 031 ± 248 | 9 837 ± 375 | 9930 ± 328 |
| Light of star A LA | 101.61 ± 1.44 | 100.61 ± 1.78 | 101.11 ± 1.62 | |
| Light of star B LB | 21.57 ± 1.24 | 21.27 ± 1.49 | 21.42 ± 1.37 | |
| Fractional light of star A ℓA | 0.8249 ± 0.0172 | 0.8255 ± 0.0214 | 0.8252 ± 0.0194 | |
| Fractional light of star B ℓB | 0.1751 ± 0.0104 | 0.1745 ± 0.0126 | 0.1748 ± 0.0115 | |
| Light ratio ℓB/ℓA | 0.2123 ± 0.0125 | 0.2114 ± 0.0152 | 0.2118 ± 0.0139 | |
Notes. The adopted solution is reported in the last column and represents the mean of the two individual solutions (see text for definition of the Part 1 and Part 2 data sets).
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