Table 2
Comparative between Bayesian log-evidences (∆ ln Z) and planet semi-amplitudes (Kp) for the different explored models.
| Model | ∆ ln Z | Kb (P = 8.8 days) | Kc (P = 28.6 days) | Kd (P = 38 days) | Ke (P = 101 days) | Kg (P ≃ 300 days) |
|---|---|---|---|---|---|---|
| 4 planets | 0.0 | 3.66±0.25 | 1.75±0.25 | 0.57±0.24 | 17.7±0.3 | – |
| GPexponential | 3.1 | 3.62±0.30 | 1.76±0.30 | 0.58±0.28 | 17.8±0.3 | – |
| GPMatern | 4.2 | 3.58±0.25 | 1.93±0.32 | 0.67±0.33 | 17.8±0.5 | – |
| GPqp (a) | 9.2 | 3.55±0.26 | 1.96±0.34 | 0.70±0.35 | 17.8±0.5 | – |
| 5 planets(a) | 7.7 | 3.56±0.25 | 1.91±0.26 | 0.61 ±0.25 | 17.6±0.3 | 1.3±0.3 |
| GPqp (b) | 10.0 | 3.54±0.26 | 1.96±0.33 | 0.72±0.35 | 17.8±0.5 | – |
| 5 planets(b) | 9.4 | 3.55±0.25 | 1.91±0.26 | 0.61 ±0.25 | 17.6±0.3 | 1.3±0.3 |
| Joint fit | 3.56±0.24 | 1.93±0.24 | 0.61±0.13 | 17.75±0.15 | 1.53±0.23 | |
Notes. We used the ln Z from the four-planet model as a reference. The adopted model used in the joint fit is marked in boldface (see Sect. 3.2 for details about the selection of the final model). The last row shows the Kp from the joint fit in Sect. 3.3 for illustrative purposes. (a)Using an uninformative prior for the periodic parameter. (b)Using a normal prior for the periodic parameter centred at 300 days.
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