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Table 3

Planetary and stellar parameters with their 68.3% central confidence intervals.

Stellar parameters from the combined analysis
Stellar density ρ⋆ [ρ⊙] 0.291
Stellar mass [M⊙] 1.129
Stellar radius [R⊙] 1.606 ± 0.049
Teff[K] 6150 ± 110
Metallicity [Fe/H] [dex] –0.04 ± 0.10
Derived log g[cgs] 4.102 ± 0.019
Age t [Gyr] 5.3 ± 1.4
Distance of the system [pc] 1430 ± 50
Interstellar extinction E(B − V) 0.057 ± 0.029
Quadratic limb-darkening coefficient ua 0.382 ± 0.031
Quadratic limb-darkening coefficient ub 0.187 ± 0.056
Stellar RV linear drift [ m s-1 yr-1] 12 ± 22
Systemic velocity (BJD 2 456 355), Vr [ km s-1] –12.951 ± 0.013
Kepler-117 b Kepler-117 c
Orbital period P [days] 18.7959228 ± 7.5 × 10-6 50.790391 ± 1.4 × 10-5
Orbital semi-major axis a [AU] 0.1445 0.2804
Primary transit epoch T0 [BJD-2450000] 4978.82204 ± 3.5 × 10-4 4968.63205 ± 2.5 × 10-4
Orbital eccentricity e 0.0493 ± 0.0062 0.0323 ± 0.0033
Argument of periastron ω [deg] 254.3 ± 4.1 305.0 ± 7.5
Orbital inclination i [deg] 88.74 ± 0.12 89.64 ± 0.10†
Transit impact parameter bprim 0.446 ± 0.032 0.268‡
Transit duration T14 [h] 7.258 ± 0.020 10.883 ± 0.031
Scaled semi-major axis a/R⋆ 19.67 ± 0.37 38.18 ± 0.72
Radius ratio Rp/R⋆ 0.04630 ± 0.00025 0.07052 ± 0.00034
Radial velocity semi-amplitude K [ m s-1] 6.5 ± 2.1 90.4 ± 7.0
Longitude of the ascending node Ω [deg] 177.9 ± 5.6 180 (fixed)
Planet mass Mp [MJ] 0.094 ± 0.033 1.84 ± 0.18
Planet radius Rp[RJ] 0.719 ± 0.024 1.101 ± 0.035
Planet density ρp [gcm-3] 0.30 ± 0.11 1.74 ± 0.18
Planet surface gravity, log  gp [cgs] 2.67 3.574 ± 0.041
Planet equilibrium temperature, Teq [K]∗ 984 ± 18 704 ± 15
Data-related parameters
Kepler jitter (LC) [ppm] 67
Kepler jitter (SC) [ppm] 0+12
SOPHIE jitter a [ m s-1] 0+25
SED jitter [mags] 0.043
TTV1 jitter [min] 0.95 ± 0.48
TTV2 jitter [min] 0.90 ± 0.62

Notes.

(†)

From the posterior distribution, reflected with respect to i = 90°.

(‡)

Reflected as the inclination, with respect to b = 0.

(∗)

, with A (planet albedo) = 0.

(a)

This value is compatible with the low level of activity observed in the photometry (Sect. 4.1) and confirms the estimate of the error bars on the RVs (Sect. 2.2). M⊙ = 1.98842 × 1030 kg, R⊙ = 6.95508 × 108 m, MJ = 1.89852 × 1027 kg, RJ = 71 492 000 m.

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