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Table 3
WASP-24 system parameters.
| Parameter | Symbol | Value | Unit |
|
|
|||
| Orbital period | P | 2.3412132 ± 0.0000018 | d |
| Epoch of mid-transit (BJD, TDB) | t c | 2 455 149.27535 ± 0.00015 | d |
| Transit duration (from first to fourth contact) | t 14 | 0.11364 ± 0.00069 | d |
| Duration of transit ingress ≈ duration of transit egress | t12 ≈ t34 | 0.01839 ± 0.00082 | d |
| Planet-to-star area ratio | (Rpl/R∗)2 | 0.01102 ± 0.00013 | |
| Impact parameter | b | 0.669 ± 0.016 | |
| Orbital inclination | i | 83.30 ± 0.30 | ° |
| Semi-amplitude of the stellar reflex velocity | K 1 | 150.6 ± 2.5 | m s-1 |
| Centre-of-mass velocity | γ rv1 | −17803 ± 0.15 | m s-1 |
| Offset between CORALIE and NOT | γ CORALIE−NOT | 102.85 ± 0.15 | m s-1 |
| Offset between CORALIE and HARPS | γ HARPS−CORALIE | −14.21 ± 0.64 | m s-1 |
| Orbital eccentricity | e |
|
|
| <0.0388 (3 σ) | |||
| Argument of periastron | ω |
|
° |
| ecosω |
|
||
| esinω |
|
||
| Phase of mid-occultation, having accounted for light travel time | φ mid−occ. |
|
|
| Occultation duration | t 58 |
|
d |
| Duration of occultation ingress ≈ duration of occultation egress | t56 ≈ t78 |
|
d |
| Relative planet-to-star flux at 3.6 μm | ΔF3.6 | 0.159 ± 0.013 | per cent |
| Relative planet-to-star flux at 4.5 μm | ΔF4.5 | 0.202 ± 0.018 | per cent |
| Planet brightness temperature at 3.6 μm | T b,3.6 | 1974 ± 71 | K |
| Planet brightness temperature at 4.5 μm | T b,4.5 | 1944 ± 85 | K |
| Sky-projected stellar rotation velocity | vsini | 5.86 ± 0.63 | km s-1 |
| Sky-projected angle between stellar spin and planetary orbit axes | λ | −5.8 ± 4.1 | ° |
| Stellar mass | M ∗ | 1.154 ± 0.025 | M ⊙ |
| Stellar radius | R ∗ | 1.354 ± 0.032 | R ⊙ |
| Stellar density | ρ ∗ | 0.465 ± 0.028 | ρ ⊙ |
| Stellar surface gravity | log g∗ | 4.236 ± 0.017 | (cgs) |
| Stellar effective temperature | T ∗,eff | 6038 ± 95 | K |
| Stellar metallicity | [Fe/H] | 0.099 ± 0.071 | (dex) |
| Planet mass | M pl | 1.091 ± 0.025 | M Jup |
| Planet radius | R pl | 1.383 ± 0.039 | R Jup |
| Planet density | ρ pl | 0.412 ± 0.032 | ρ Jup |
| Planet surface gravity | log gP | 3.115 ± 0.022 | (cgs) |
| Scaled orbital major semi-axis | a/R∗ | 5.75 ± 0.11 | |
| Orbital major semi-axis | a | 0.03619 ± 0.00027 | AU |
| Planet equilibrium temperature† (full redistribution) | T P,A = 0,f = 1 | 1781 ± 34 | K |
| Planet equilibrium temperature† (day side redistribution) | T P,A = 0,f = 2 | 2118 ± 41 | K |
| Planet equilibrium temperature† (instant re-radiation) | T P,A = 0,f = 8/3 | 2276 ± 44 | K |
Notes.
(†)
TP,A = 0,f = 
where f is the redistribution factor, with f = 1 for full redistribution, f = 2 for dayside redistribution and f = 8/3 for instant re-radiation (Cowan & Agol 2011). We assumed the planet albedo to be zero, A = 0.
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