Table 4
System parameters for WASP-79b.
| Parameter | Value (ms) | Value (no-ms) |
|
|
||
| Transit epoch (HJD, UTC), T0 | 2 455 545.23479 ± 0.00125 | 2 455 545.23530 ± 0.00150 |
| Orbital period, P | 3.6623817 ± 0.0000051 d | 3.6623866 ± 0.0000085 d |
| Transit duration, T14 | 0.1563 ± 0.0031 d | 0.1661 ± 0.0037 d |
| Transit depth, (RP/R ∗ )2 | 0.01148 ± 0.00051 | 0.01268 ± 0.00063 |
| Impact parameter, b | 0.570 ± 0.052 | 0.706 ± 0.031 |
| Stellar reflex velocity, K1 | 0.0882 ± 0.0078 km s-1 | 0.0885 ± 0.0077 km s-1 |
| Centre-of-mass velocity at time T0, γ | 4.9875 ± 0.0004 km s-1 | 4.9875 ± 0.0004 km s-1 |
| Orbital separation, a | 0.0539 ± 0.0009 AU | 0.0535 ± 0.0008 AU |
| Orbital inclination, i | 85.4 ± 0.6 ° | 83.3 ± 0.5 ° |
| Orbital eccentricity, e | 0.0 (assumed) | 0.0 (assumed) |
| Stellar density, ρ ⋆ | 0.36 ± 0.04 ρ⊙ | 0.22 ± 0.03 ρ⊙ |
| Stellar mass, M ⋆ | 1.56 ± 0.09 M⊙ | 1.52 ± 0.07 M⊙ |
| Stellar radius, R ⋆ | 1.64 ± 0.08 R⊙ | 1.91 ± 0.09 R⊙ |
| Stellar surface gravity, log g ⋆ | 4.20 ± 0.03 | 4.06 ± 0.03 |
| Planet mass, MP | 0.90 ± 0.09 MJup | 0.90 ± 0.08 MJup |
| Planet radius, RP | 1.70 ± 0.11 RJup | 2.09 ± 0.14 RJup |
| Planet surface gravity, log gP | 2.85 ± 0.06 | 2.67 ± 0.06 |
| Planet density, ρP | 0.18 ± 0.04 ρJup | 0.10 ± 0.02 ρJup |
| Planet equilibrium temperature, TP | 1770 ± 50 K | 1900 ± 50 K |
Notes. Two solutions are presented: Col. 2 gives that using the main-sequence constraint, while Col. 3 give that without this constraint. The planet equilibrium temperature, TP, assumes a Bond albedo of A = 0 and even redistribution of heat around the planet. Limb-darkening coefficients for the ms solution were for WASP a1 = 0.441, a2 = 0.599, a3 = −0.514 and a4 = 0.150 and TRAPPIST (z′) a1 = 0.517, a2 = 0.202, a3 = −0.181 and a4 = 0.025, while for the non-ms solution they were for WASP a1 = 0.447, a2 = 0.566, a3 = −0.459 and a4 = 0.126 and TRAPPIST (z′) a1 = 0.523, a2 = 0.172, a3 = −0.133 and a4 = 0.004.
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