Table 1
Parameters used to calculate the expected apsidal motion rate in Sect. 4 of WASP-18Ab or used as priors in Eq. (21).
| Parameter | Value and uncertainty | Source |
|---|---|---|
| Ve sin i (km s−1) | 11.5 ± 1.5 | Hellier et al. (2009) |
| Rp∕Rs |  |
Triaud et al. (2010) |
| Rs∕a |  |
Triaud et al. (2010) |
| q = Mplanet∕Ms | 0.007784 ± 0.000315 | Triaud et al. (2010) |
| Ms∕M⊙ | 1.24 ± 0.04 | Triaud et al. (2010) |
| Rs∕R⊙ |  |
Triaud et al. (2010) |
| Porb∕Prot | 0.17184 ± 0.01345 | Calculated from Rs and Ve sin i |
| a | 0.02047 ± 0.00053 | Southworth et al. (2009) |
| Inclination (°) | 85.96 ± 1.70 | Southworth et al. (2009) |
| Teff, star (K) | 6400 ± 100 | Hellier et al. (2009) |
| Transit period (d) | 0.94145299 ± 8.7 × 10−7 | Hellier et al. (2009) |
| Epoch | 2 454 221.48 163 | Hellier et al. (2009), fixed |
| k2,star | 0.0143 ± 0.0008 | Claret (2004) |
| e | 0.0085 ± 0.0020 | This study |
| ω (°) | 257.27 ± 2.13 | This study |
| K (m s−1) |  |
This study |
Notes. The Love number of the star was estimated from the tables of Claret (2004) by interpolation who presented the apsidal motion constant (half of the Love number) as a function of stellar effective temperature, mass and radius. q is calculated from the planetary and stellar masses of Triaud et al. (2010).
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