Table 4
System parameters for WASP-104 and WASP-106.
| Parameter | Symbol | Unit | WASP-104 | WASP-106 |
|
|
||||
| Model parameters: | ||||
| Orbital period | P | d | 1.7554137 † |
9.289715 ± 0.000010 |
| Epoch of mid-transit | Tc | HJD, UTC | 2 456 406.11126 ± 0.00012 | 2 456 649.54972 ± 0.00033 |
| Transit duration | T14 | d | 0.07342 ± 0.00056 | 0.22346 |
| Planet-to-star area ratio |  / |
... | 0.01474 ± 0.00020 | 0.00642 ± 0.00018 |
| Transit impact parameter | b | ... | 0.724 ± 0.014 | 0.127 |
| Stellar orbital velocity semi-amplitude | K ∗ | m s-1 | 202.7 ± 4.3 | 165.3 ± 4.3 |
| System velocity | γ | km s-1 | 28.54804 ± 0.00010 | 17.24744 ± 0.00019 |
| Velocity offset between CORALIE and SOPHIE | γ COR − SOPH | m s-1 | 280.2 ± 1.0 | −59.57 ± 0.13 |
| Stellar effective temperature | T∗,eff | K | 5475 ± 127 | 6055 ± 136 |
| Stellar metallicity | [Fe/H] | dex | + 0.320 ± 0.090 | −0.090 ± 0.090 |
| Derived parameters: | ||||
| Ingress/egress duration | T12 = T34 | d | 0.01535 ± 0.00075 | 0.01685 |
| Orbital inclination angle | iP | ° | 83.63 ± 0.25 | 89.49 |
| Orbital eccentricity (adopted) | e | ... | 0 | 0 |
| Orbital eccentricity (3-σ upper-limit) | ... | ... | 0.060 | 0.13 |
| Stellar mass | M∗ | M⊙ | 1.076 ± 0.049 | 1.192 ± 0.054 |
| Stellar radius | R∗ | R⊙ | 0.963 ± 0.027 | 1.393 |
| log (stellar surface gravity) | log g∗ | (cgs) | 4.503 ± 0.016 | 4.226 |
| Stellar density | ρ∗ | ρ⊙ | 1.207 ± 0.070 | 0.445 |
| Planet mass | MP | MJup | 1.272 ± 0.047 | 1.925 ± 0.076 |
| Planet radius | RP | RJup | 1.137 ± 0.037 | 1.085 |
| log (planet surface gravity) | log gP | (cgs) | 3.353 ± 0.023 | 3.571 |
| Planet density | ρP | ρJ | 0.866 ± 0.071 | 1.50 |
| Scaled orbital major semi-axis | a/R∗ | ... | 6.52 ± 0.13 | 14.20 |
| Orbital major semi-axis | a | au | 0.02918 ± 0.00045 | 0.0917 ± 0.0014 |
| Planet equilibrium temperature | T P,A = 0 | K | 1516 ± 39 | 1140 ± 29 |
| (uniform heat redistribution) | ||||
Notes. The following constant values are used: au = 1.49598 × 1011 m; R⊙ = 6.9599 × 108 m; M⊙ = 1.9892 × 1030 kg; RJup = 7.1492 × 107 m; MJup = 1.89896 × 1027 kg; ρJ = 1240.67 kg m-3.
The orbital period of WASP-104b and its uncertainty was determined from a fit to all the data (including photometry from the WASP instruments). The period was fixed in subsequent analyses (which excluded the WASP photometry). See Sect. 3.2.1.
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