Table 6
WASP-148 system parameters.
| Stellar parameters (Sect. 3): | WASP-148 | ||
| Stellar mass, M* | [M⊙] | 1.00 ± 0.08 | |
| Stellar radius, R* | [R⊙] | 1.03 ± 0.20 | |
| Stellar density, ρ* | [g cm−3] |  |
|
| Spectroscopic surface gravity, log g | [cgs] | 4.40 ± 0.15 | |
| Effective temperature, Teff | [K] | 5460 ± 130 | |
| Metallicity, [Fe∕H] | [dex] | +0.11 ± 0.08 | |
Activity index,  |
− 5.09 ± 0.11 | ||
| Projected RV, v sin i* | [km s−1] | 3 ± 2 | |
| Rotation period, Prot | [d] | 26.2 ± 1.3 | |
| Barycentric systemic RV, γ | [km s−1] | − 5.619 ± 0.005 | |
| Transit and orbital parameters (Sect. 5): | WASP-148b | WASP-148c | |
| Orbital period, P | [d] | 8.803810 ± 0.000043 (a) | 34.516 ± 0.029 |
| [8.803726, 8.803894] | [34.467, 34.582] | ||
| Argument of periastron, ω | [deg] | 59 ± 20 | 14 ± 17 |
| [11.2, 89.4] | [−20.0, 46.7] | ||
| Time of inferior conjunction or transit, Tc | [BJDUTC − 2 450 000] | 7957.4877 ± 0.0059(a) | 7935.2 ± 1.1 |
| [7957.4761, 7957.4993] | [7933.2, 7937.9] | ||
| Time of pericenter passage, Tp | [BJDUTC − 2 450 000] | 7957.00 ± 0.43 | 7931.4 ± 1.5 |
| [7955.84, 7957.52] | [7928.5, 7934.6] | ||
| Mean longitude at BJD = 2 455 500, λ0 | [deg] | 27.3 ± 4.2 | 214 ± 17 |
| [21.4, 38.4] | [182.2, 252.2] | ||
| Transit duration, T14 | [h] | 3.016 ± 0.019(b) | – |
| [2.984, 3.060] | – | ||
| Radius ratio, Rp∕R* | 0.0807 ± 0.0007 | – | |
| [0.07943, 0.08224] | – | ||
| Normalized semimajor axis, a∕R* | 19.8 ± 1.5 | – | |
| [17.7, 23.8] | – | ||
| Impact parameter, b | 0.046 ± 0.066 | – | |
| [0.000, 0.216] | – | ||
| Orbital inclination, ip | [deg] | 89.80 ± 0.27 | – |
| [89.10, 90.00] | – | ||
| RV semiamplitude, K1 | [m s−1 ] | 28.7 ± 2.0 | 25.9 ± 2.9 |
| [24.5, 32.7] | [21.4, 33.1] | ||
 |
0.24 ± 0.09 | 0.58 ± 0.10 | |
| [0.033, 0.385] | [0.344, 0.733] | ||
 |
0.40 ± 0.12 | 0.14 ± 0.15 | |
| [0.05, 0.54] | [−0.20, 0.38] | ||
| Orbital eccentricity, e | 0.220 ± 0.063 | 0.359 ± 0.086 | |
| [0.053, 0.306] | [0.175, 0.517] | ||
| Planet mass (sky-projected), Mp sin ip | [MJup ] | 0.291 ± 0.025 | 0.397 ± 0.044 |
| [0.238, 0.336] | [0.318, 0.494] | ||
| Planet mass, Mp | [MJup ] | 0.291 ± 0.025 | 0.40 ± 0.05 |
| [0.238, 0.336] | [0.32, 0.60](c) | ||
| Planet radius, Rp | [RJup ] | 0.722 ± 0.055 | – |
| [0.578, 0.798] | – | ||
| Planet density, ρp | [g cm−3 ] | 0.96 ± 0.26 | – |
| [0.63, 1.64] | – | ||
| Orbital semimajor axis, a | [AU] | 0.0845 ± 0.0022 | 0.2101 ± 0.0055 |
| [0.0789, 0.0877] | [0.1962, 0.2182] | ||
| Planet blackbody equilibrium temperature (d), Teq | [K] | 940 ± 80 | 590 ± 50 |
| [745, 1050] | [470, 670] | ||
| ωb − ωc | [deg] | 45 ± 25 | |
| [−10.3, 89.9] | |||
| Stellar radius (from WASP-148b transits), R* | [R⊙ ] | 0.918 ± 0.070 | |
| [0.744, 1.019] | |||
| Stellar density (from WASP-148b transits), ρ* | [g cm−3 ] | 1.89 ± 0.48 | |
| [1.31, 3.16] | |||
Notes. The stellar parameters are obtained from Sect. 3. The transit and orbital parameters are obtained from the Keplerian fit statistics of the joint posterior sample (Sect. 5). In particular, the mean ephemeris of WASP-148b are obtained from the TTV fit presented in see Sect. 5.4.1. The MAP probability estimates are given together with the standard deviations of the marginal distribution following the ± sign. For some parameters, the extremes of the 95% highest density interval are also given in brackets. Except for the semiamplitude K1, which refers to the star, the other orbitalparameters (ω, λ0, T14, b, a...) refer to the planetary orbits. (a)Mean ephemeris obtained from the TTV fit presented in see Sect. 5.4.1. (b) Computed under the approximations of Tingley & Sackett (2015). (c)See Sect. 6.3. (d)Computed at a, assuming a Bond albedo of 0.1 and a uniform heat redistribution to the night side.
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