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Table 3
System parameters from RV and transit data from our adopted, circular solutions.
| Parameter | Symbol | WASP-22 | WASP-26 | Unit |
|
|
||||
| Orbital period | P | 3.5327313 ± 0.0000058 | 2.7566004 ± 0.0000067 | d |
| Epoch of mid-transit (HJD, UTC) | T0 | 2 455 497.39967 ± 0.00025 | 2 455 228.38842 ± 0.00058 | d |
| Transit duration | T14 | 0.14501 |
0.0993 ± 0.0018 | d |
| Transit ingress (=egress) duration | T12 = T34 | 0.01369 |
0.0239 ± 0.0026 | d |
| Planet-star area ratio | (RP/R∗)2 | 0.00954 ± 0.00018 | 0.01022 ± 0.00034 | |
| Impact parameter | b | 0.25 ± 0.12 | 0.812 ± 0.020 | |
| Orbital inclination | i | 88.26 ± 0.91 | 82.91 ± 0.46 | ° |
| Stellar reflex velocity semi-amplitude | K1 | 73.2 ± 1.7 | 137.7 ± 1.5 | m s-1 |
| Semi-major axis | a | 0.04698 ± 0.00037 | 0.03985 ± 0.00033 | AU |
| Offset between HARPS and CORALIE | ΔγHARPS | 17.60 ± 0.80 | 20.62 ± 0.14 | m s-1 |
| Systemic velocity at time T0 | γ | −7 187.3 ± 3.5 | 8 459.297 ± 0.073 | m s-1 |
| Linear drift in systemic velocity |
|
37.8 ± 2.2 | – | m s-1 yr-1 |
| Orbital eccentricity | e | 0 (adopted) | 0 (adopted) | |
| < 0.063 (3σ) | < 0.048 (3σ) | |||
| Sky-projected spin-orbit angle | λ | 22 ± 16 | – | ° |
| Sky-projected stellar rotation velocity | vsinI | 4.42 ± 0.34 | – | km s-1 |
| vsinI cosλ | 3.98 ± 0.43 | – | km s-1 | |
| vsinI sinλ | 1.63 ± 1.13 | – | km s-1 | |
| Stellar mass | M∗ | 1.109 ± 0.026 | 1.111 ± 0.028 | M⊙ |
| Stellar radius | R∗ | 1.219 |
1.303 ± 0.059 | R⊙ |
| Stellar surface gravity | log g∗ | 4.310 |
4.253 ± 0.034 | (cgs) |
| Stellar density | ρ∗ | 0.612 |
0.502 ± 0.062 | ρ⊙ |
| Stellar effective temperature | Teff | 5958 ± 98 | 5939 ± 100 | K |
| Stellar metallicity | [Fe/H] | 0.050 ± 0.080 | −0.020 ± 0.091 | |
| Planetary mass | Mpl | 0.588 ± 0.017 | 1.028 ± 0.021 | MJup |
| Planetary radius | Rpl | 1.158 |
1.281 ± 0.075 | RJup |
| Planetary surface gravity | log gpl | 3.001 |
3.156 ± 0.048 | (cgs) |
| Planetary density | ρpl | 0.378 |
0.488 ± 0.082 | ρJup |
| Planetary equilibrium temperature | Teql | 1466 ± 34 | 1637 ± 45 | K |
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