Open Access
Table 5
PyTTV model parameters and priors.
| Description | Units | Prior |
|---|---|---|
| Stellar parameters | ||
| Stellar mass | (M⊙) | 𝒩 (1.447,0.077) |
| Stellar radius | (R⊙) | 𝒩 (1.698,0.060) |
Limb darkening  |
(–) | 𝒰 (0, 1) |
Limb darkening  |
(–) | 𝒰 (0, 1) |
| Planet b parameters | ||
| log10 mass | (log10 M⊙) | 𝒰 (−2.8,−2.l) |
| Radius ratio | (R★) | 𝒩 (0.08,0.001) |
| Transit centre | (BJD) | 𝒩 (2459 378.46,0.02) |
| Orbital period | (d) | 𝒩 (0.67247414, 0.005) |
| Impact parameter | (R★) | 𝒩 (0.75,0.01) |
 cos ω |
(–) | 𝒰(−0.25,0.25) |
 sin ω |
(–) | 𝒰(−0.25,0.25) |
| Ω | (rad) | N(π, 0.0001) |
| Planet c parameters | ||
| logio mass | (log10 M⊙) | 𝒰(−5.2, −3.0) |
| Radius ratio | (R★) | 𝒩(0.05, 0.0001) |
| Mean anomaly at Tref | (rad) | 𝒰(0, 2π) |
| Orbital period | (d) | Depends on the scenario |
| Impact parameter | (R★) | 𝒰(1.0,3.0) |
 cos ω |
(–) | 𝒰(−0.25, 0.25) |
 sin ω |
(–) | 𝒰(−0.25, 0.25) |
| Ω | (rad) | N(π, 0.0001) |
| RV parameters | ||
| Linear trend | (m/s/d) | 𝒩 (−0, 1.0) |
| Systemic velocity 1 | (m/s) | 𝒩 (−25 855,200) |
| Systemic velocity 2 | (m/s) | 𝒩 (−25 416,200) |
| log10 jitter 1 | (log10 m/s) | 𝒩 (−1,0.1) |
| log10 jitter 2 | (log10 m/s) | 𝒩 (−1,0.1) |
| Additional priors | ||
| Both eccentricities | 𝒩 (0.0, 0.023) | |
Notes. All the planetary parameters except the radius ratio and log10 mass are defined at a reference time, tref = 2459 378.46. (a)We use the triangular parametrisation for quadratic limb darkening introduced by Kipping (2013).
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