Table 4
Summary of the parameters of planets AU Mic b and AU Mic c.
| Parameter | Unit | AU Mic b | AU Mic c |
|---|---|---|---|
| Time of conjunction | TBJD | 1330.39051 ± 0.00015 | 1342.2223 ± 0.0005 |
| Orbital period | d | 8.463000 ± 0.000002 | 18.859019 ± 0.000016 |
| Normalized semi-major axis, a∕R⋆ | – | 19.1 ± 0.3 | 29 ± 3 |
| Semi-major axis(†) | au | 0.0645 ± 0.0013 | 0.1101 ± 0.0022 |
| Transit duration | h | 3.50 ± 0.08 | 4.5 ± 0.8 |
| Orbital inclination | degree | 89.5 ± 0.3 |  |
| Impact parameter | R⋆ | 0.18 ± 0.11 | 0.51 ± 0.21 |
| Eccentricity | – | 0 (FIXED) | 0 (FIXED) |
| Planet-to-star radius ratio (§), Rp∕R⋆ | – | 0.0496 ± 0.0007 | 0.0395 ± 0.0011 |
| Planet radius | RJup | 0.371 ± 0.016 | 0.295 ± 0.014 |
| Planet radius | RNep | 1.05 ± 0.04 | 0.84 ± 0.04 |
| Planet radius | R⊕ | 4.07 ± 0.17 | 3.24 ± 0.16 |
| Velocity semi-amplitude | m s−1 |  (§§) |
0.8 < Kc < 9.5 |
| Planet mass | MJup | 0.054 ± 0.015 (§§) | 0.007 < Mc < 0.079 |
| Planet mass | MNep | 1.00 ± 0.27 (§§) | 0.13 < Mc < 1.46 |
| Planet mass | M⊕ | 17 ± 5 (§§) | 2.2 < Mc < 25.0 |
| Planet density | g cm−3 | 1.4 ± 0.4 | 0.4 < ρc < 4.1 |
| Equilibrium temperature | K | 593 ± 21 | 454 ± 16 |
Notes. (†) Semi-major axis derived from the fit period and the Kepler’s law; (§§)radius values correspond to the effective radius, which is already corrected for spot coverage and contains an additional uncertainty due to rotational modulation, as explained in Sect. 7; (§§) Klein et al. (2021).
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