Table A.4
Parameters used in the analysis.
| Parameter | Prior | Posterior | |
|---|---|---|---|
| Dartmouth | PARSEC | ||
| (Adopted) | |||
| Stellar parameters | |||
| Effective temperature Teff (K) |  |
5477 ± 27 | 5480 ± 24 |
| Surface gravity log g (cgs) |  |
4.419 ± 0.053 | 4.429 ± 0.045 |
| Iron abundance [Fe/H] (dex) |  |
0.078 ± 0.020 | 0.079 ± 0.020 |
| Distance to Earth D (pc) |  |
145 ± 8 | 141 ± 6 |
| Interstellar extinction E(B − V) (mag) |  |
 |
 |
| Systemic radial velocity γ (km s−1) |  |
− 18.186 ± 0.002 | − 18.186 ± 0.002 |
| Linear limb-darkening coefficient ua | (Derived) | 0.4631 ± 0.0061 | 0.4625 ± 0.0057 |
| Quadratic limb-darkening coefficient ub | (Derived) | 0.2270 ± 0.0041 | 0.2273 ± 0.0037 |
| Stellar density ρ⋆ ∕ρ⊙ | (Derived) | 0.98 ± 0.19 | 1.03 ± 0.16 |
| Stellar mass M⋆ (M⊙) | (Derived) | 0.915 ± 0.017 | 0.884 ± 0.018 |
| Stellar radius R⋆ (R⊙) | (Derived) | 0.977 ± 0.053 | 0.950 ± 0.040 |
| Stellar age τ (Gyr) | (Derived) | 9.7 ± 3.0 | 10.8 ± 2.8 |
| Planet b parameters | |||
| Orbital period P (d) |  |
2.369172 ± 8.9 × 10−5 | 2.369173 ± 9.0 × 10−5 |
| Transit epoch T0 (BJD - 2456000) |  |
981.6431 ± 1.6 × 10−3 | 981.6431 ± 1.6 × 10−3 |
| Radial velocity semi-amplitude K (m s−1) |  |
3.34 ± 0.43 | 3.33 ± 0.43 |
| Orbital inclination i (°) |  |
87.7 ± 1.6 | 88.1 ± 1.4 |
| Planet-to-star radius ratio k |  |
0.01604 ± 0.00041 | 0.01599 ± 0.00035 |
| Orbital eccentricity e |  |
0.084 ± 0.079 | 0.080 ± 0.068 |
| Argument of periastron ω (°) |  |
 |
 |
| System scale a∕R⋆ | (Derived) | 7.43 ± 0.45 | 7.56 ± 3.8 |
| Impact parameter b | (Derived) | 0.30 ± 0.20 | 0.25 ± 0.19 |
| Transit duration T14 (h) | (Derived) | 2.266 ± 0.050 | 2.264 ± 0.049 |
| Semi-major axis a (AU) | (Derived) | 0.03376 ± 0.00021 | 0.03337 ± 0.00023 |
| Planet mass Mp (M⊕) | (Derived) | 6.54 ± 0.84 | 6.38 ± 0.83 |
| Planet radius Rp (R⊕) | (Derived) | 1.71 ± 0.11 | 1.654 ± 0.84 |
| Planet bulk density ρp (g cm−3) | (Derived) | 7.1 ± 1.8 | 7.7 ± 1.7 |
| Gaussian process hyperparameters | |||
| A(m s−1) |  |
 |
5.96 ± 1.2 |
| λ1 (d) |  |
34 ± 12 | 34 ± 12 |
| λ2 |  |
0.46 ± 0.12 | 0.46 ± 0.12 |
| Prot (d) |  |
32.2 ± 0.5 | 32.2 ± 0.5 |
| Instrument-related parameters | |||
| HARPS jitter (m s−1) |  |
1.9 ± 0.4 | 1.9 ± 0.4 |
| K2 contamination (%) |  |
0.952 ± 0.024 | 0.952 ± 0.024 |
| K2 jitter (ppm) |  |
59 ± 1 | 59 ± 1 |
| K2 out-of-transit flux |  |
1.000006 ± 2 × 10−6 | 1.000006 ± 2 × 10−6 |
| SED jitter (mag) |  |
0.054 ± 0.021 | 0.054 ± 0.022 |
Notes. The respective priors are provided together with the posteriors for both the Dartmouth and PARSEC stellar evolution tracks. The posterior values represent the median and 68.3% credible interval. Fixed and derived values that might be useful for follow-up work are also reported.
: normal distribution with mean μ and width σ2.
: uniform distribution between a and b.
: normal distribution with mean μ and width σ2 multiplied with a uniform distribution between a and b.
: sine distribution between a and b.
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