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Table 2
Physical and orbital parameters of the WASP-52 system.
| Parameter | Symbol [Unit] | Value |
|---|---|---|
| Stellar parameters | ||
| Stellar mass | M⋆ [M⊙] | 0.87 ± 0.03 (a) |
| Stellar radius | R⋆ [R⊙] | 0.79 ± 0.02 (a) |
| Effective temperature | Teff [K] | 5014 ± 41 (b) |
| Surface gravity | logg⋆ [cgs] | 4.48 ± 0.08 (b) |
| Metallicity | [Fe∕H] [dex] | 0.06 ± 0.03 (b) |
| Projected rotation velocity | vsini⋆ [km s−1] | 3.13 ± 0.42 (b) |
| Planet parameters | ||
| Planet mass | Mp [MJ] | 0.46 ± 0.02 (a) |
| Planet radius | Rp [RJ] | 1.27 ± 0.03 (a) |
| Equilibrium temperature | Teq [K] | 1315 ± 35 (a) |
| Surface gravity | loggp [cgs] | 2.81 ± 0.03 (a) |
| System parameters | ||
| Transit epoch | T0 [BJDTDB] | 2456862.79776 (c) |
| Orbital period | P [d] | 1.74978119 (c) |
| Planet-to-star radius ratio | Rp∕R⋆ | 0.1608 ± 0.0018 (d) |
| Scaled semi-major axis | a∕R⋆ | 7.14 ± 0.12 (d) |
| Orbital inclination | i [deg] | 85.06 ± 0.27 (d) |
| Transit duration | T14 [d] | 0.07734 (d) |
| Fully in-transit duration | T23 [d] | 0.04477 (d) |
| Eccentricity | e | 0 (fixed) (a) |
| Stellar RV semi-amplitude | K⋆ [km s−1] | 0.0843 ± 0.0030 (a) |
| Rossiter–McLaughlin parameters | ||
| Systemic velocity #1 | γ [m s−1] | −821.16 ± 0.66 (e) |
| Systemic velocity #2 | γ [m s−1] | −843.39 ± 0.63 (e) |
| Systemic velocity #3 | γ [m s−1] | −835.69 ± 0.56 (e) |
| Joint offset of mid-transit | ΔTC [d] | 0.00031 ± 0.00032 (e) |
| Stellar RV semi-amplitude | K⋆ [km s−1] | 0.0828 ± 0.0021 (e) |
| Projected rotation velocity | v sin i⋆ [km s −1 ] | 2.622 ± 0.074 (e) |
| Projected spin-orbit angle | λ [deg] | 1.1 ± 1.1 (e) |
| Limb darkening coefficient | u1 | 0.94 ± 0.06 (e) |
References. (a) Hébrard et al. (2013). (b) This work (spectroscopic analysis). (c)Mancini et al. (2017). (d)Chen et al. (2017). (e)This work (Rossiter–McLaughlin analysis).
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