Characterising WASP-43b’s interior structure: Unveiling tidal decay and apsidal motion

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Volume 694 (February 2025)

A&A, 694 (2025) A233

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Table 1

Fitting parameters of the JWST light curve.

Parameter	Symbol (units)	Value	Priors
Mid-transit time	T_tr (BJD_TDB-2 450 000)	9915.12076 ± 0.00032	𝒰 [9914.0;9916.0]
Sidereal period	P_s (d)	${0.81346}_{- 0.00030}^{+ 0.00031}$ ${0.81346_{ - 0.00030}^{ + 0.00031}}$	𝒰 [0.8125; 0.8144]
Scaled semi-major axis	a/R_⋆	${4.834}_{- 0.045}^{+ 0.050}$ ${4.834_{ - 0.045}^{ + 0.050}}$	𝒰 [0; 10]
Planet-to-star radius ratio	r_p/R_⋆	${0.1568}_{- 0.0010}^{+ 0.0012}$ ${0.1568_{ - 0.0010}^{ + 0.0012}}$	𝒰 [0.5; 0.5]
Planet-to-star intensity ratio	I_p/I_⋆	${0.0445}_{- 0.0113}^{+ 0.0099}$ ${0.0445_{ - 0.0113}^{ + 0.0099}}$	𝒰 [0; 1]
Impact parameter	b	${0.6676}_{- 0.0111}^{+ 0.0082}$ ${0.6676_{ - 0.0111}^{ + 0.0082}}$	𝒰 [0; 1]
	$\sqrt{e} \cdot \sin ω$ ${\sqrt e \cdot \sin \omega }$	${0.0065}_{- 0.0559}^{+ 0.0440}$ ${0.0065_{ - 0.0559}^{ + 0.0440}}$	𝒰 [−1; 1]
	$\sqrt{e} \cdot \cos ω$ ${\sqrt e \cdot \cos \omega }$	$- {0.0082}_{- 0.0098}^{+ 0.0073}$ ${ - 0.0082_{ - 0.0098}^{ + 0.0073}}$	𝒰 [−1; 1]
White noise	σ_w	${0.0007722}_{- 0.0000049}^{+ 0.0000047}$ $0.0007722_{ - 0.0000049}^{ + 0.0000047}$	𝒰 [0; 1]
Red noise	σ_r	0.02044 ± 0.00053	𝒰 [0; 1]
Limb darkening	u₊	0.168 ± 0.024
	u₋	−0.05 ± 0.14

Notes. Median and 1σ error bars of the fitting parameters of the full-phase JWST light curve between 6.5 and 7.0 µm. Limb darkening parameters u₊ and u₋ are not fitting parameters but were derived from the limb darkening parameters A and B (see Kálmán et al. 2024), so their priors are not reported in the Table.

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