Table 2
Summary of stellar and planetary parameters of the WASP-189 system adopted in this study.
| Planetary parameters | ||
|---|---|---|
| Planet radius (Rp) [RJup] |  |
[3] |
| Planet mass (Mp) [MJup] |  |
[1] |
| Eq. temperature (Teq) [K] | 2641± 31 | [2] |
| Density (ρ) [g cm−3] |  |
[1] |
| Surface gravity (log gp) |  |
[1] |
| Stellar parameters | ||
| Star radius (R*) [R⊙] | 2.360 ± 0.030 | [1] |
| Star mass (M*) [M⊙] | 2.030 ± 0.066 | [1] |
| Proj. rot. velocity (υ sin I*) [km s−1] | 93.1 ± 1.7 | [1] |
| Systemic velocity (υsys) [km s−1] | −24.452 ± 0.012 | [2] |
| Orbital and transit parameters | ||
| Transit centre time (T0) [BJDTT - 2 450 000] |  |
[1] |
| Orbital semi-major axis (a) [au] | 0.05053 ± 0.00098 | [1] |
| Scaled semi-major axis (a/R*) |  |
[1] |
| Orbital inclination (i) [°] | 84.03 ± 0.14 | [1] |
| Projected orbital obliquity (λ) [°] |  |
[1] |
| Eclipse duration (T14) [h] |  |
[1] |
| Radius ratio (Rp/R*) |  |
[1] |
| RV semi-amplitude (K) [km s−1] | 0.182 ± 0.013 | [1] |
| Period (P) [d] | 2.7240330 ± 0.0000042 | [2] |
| Eccentricity | 0.0 | [1] |
| Derived parameters(†) | ||
| Orbital velocity υorb [km s−1] | 201.8 ± 3.9 | |
| Proj. orbital velocity (Kp = υorb sin i) [km s−1] | 200.7 ± 4.9 | |
| Approx. scale height (H) [km] |  |
|
| Transit depth of H (ΔF/F) [×10−5] |  |
|
Notes.(†) The projected orbital velocity is given by Kp = υorb sin i = 
. The approximate scale height is given by 
, where R is the gas constant and μ is the mean molecular weight of the atmosphere. In the case of WASP-189 b, we calculated the mean molecular weight using FastChem (Stock et al. 2018, 2022) and found μ = 2.016 g mol−1, which is in agreement with a mostly hydrogen and helium dominated atmosphere. The transit depth of a scale height is calculated using 
. All uncertainties were calculated assuming Gaussian error propagation.
References. [1] Lendl et al. (2020), [2] Anderson et al. (2018), [3] Deline et al. (2022).
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