Exploring the ultra-hot Jupiter WASP-178b - Constraints on atmospheric chemistry and dynamics from a joint retrieval of VLT/CRIRES+ and space photometric data

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Volume 688 (August 2024)

A&A, 688 (2024) A206

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Table 2

Parameters of the WASP-178 system.

Parameter	Symbol (unit)	Value
Planet
Radius	R_p (R_Jup)	${1.940}_{- 0.058}^{+ 0.060}$ $\[1.940_{-0.058}^{+0.060}\]$
Orbital period	P_orb (d)	3.3448412
Transit epoch	T₀ (BJD_tdb)	2458321.86724
Transit duration	T_transit (h)	3.63 ± 0.04
Ingress duration	T_ingress (h)	${0.57}_{- 0.03}^{+ 0.04}$ $\[0.57_{-0.03}^{+0.04}\]$
Orbital inclination	i (deg)	84.45
Surface gravity	log g (cgs)	2.97
RV semi-amplitude	K_p (km s⁻¹)	176.5
		181.0 ^(*)
Systemic velocity	υ_sys (km s⁻¹)	$- {25.595}_{- 0.024}^{+ 0.025}$ $\[-25.595_{-0.024}^{+0.025}\]$
		−23.908 ± 0.007 ^(*)
Star
Radius	R_* (R_⊙)	${1.801}_{- 0.048}^{+ 0.049}$ $\[1.801_{-0.048}^{+0.049}\]$
Effective temperature	T_eff (K)	$8640_{- 240}^{+ 500}$ $\[8640_{-240}^{+500}\]$

Notes. ^(*)Hellier et al. (2019), all other values from Rodríguez Martínez et al. (2020). The RV semi-amplitude values were calculated using the expression, K_p = (2πGM_*/P_orb)^1/3 · sin i where G is the gravitational constant and all other parameters are listed in the table. In the present study we use the values from Rodríguez Martínez et al. (2020) due to the more recent transit epoch. The values of K_p and υ_sys obtained from Hellier et al. (2019) are shown here for comparison.

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