The obliquity and atmosphere of the hot Jupiter WASP-122b (KELT-14b) with ESPRESSO: An aligned orbit and no sign of atomic or molecular absorption

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Volume 691 (November 2024)

A&A, 691 (2024) A120

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Table 1

Physical and orbital parameters of the WASP-122 system.

Parameter	Value
Stellar parameters
T_eff [K]	$5802_{- 92}^{+ 95}$ $5802_{ - 92}^{ + 95}$
log g [cgs]	${4.234}_{- 0.041}^{+ 0.045}$ $4.234_{ - 0.041}^{ + 0.045}$
[Fe/H]	${0.326}_{- 0.089}^{+ 0.091}$ $0.326_{ - 0.089}^{ + 0.091}$
M_★ [M_⊙]	${1.178}_{- 0.066}^{+ 0.052}$ $1.178_{ - 0.066}^{ + 0.052}$
R_⋆ [R_⊙]	${1.368}_{- 0.077}^{+ 0.078}$ $1.368_{ - 0.077}^{ + 0.078}$
v sin i_⋆^(a) [km s^–1]	1.84 ± 0.08
Planet parameters
M_p [M_J]	1.196 ± 0.072
R_p [R_J]	${1.52}_{- 0.11}^{+ 0.12}$ $1.52_{ - 0.11}^{ + 0.12}$
T_eq [K]	1904 ± 54
K_p^(a) [km s^–1]	185 ± 4
Transit parameters
T₀^(b) [BJD_TDB]	2457872.52231 ± 0.00015
P ^(b) [days]	1.71005344 ± 0.00000032
T₁₄^(c) [days]	${0.0889}_{- 0.0026}^{+ 0.0025}$ $0.0889_{ - 0.0026}^{ + 0.0025}$
System parameters
a/R_⋆	${4.64}_{- 0.22}^{+ 0.25}$ $4.64_{ - 0.22}^{ + 0.25}$
R_p/R_⋆	${0.1143}_{- 0.0026}^{+ 0.0029}$ $0.1143_{ - 0.0026}^{ + 0.0029}$
i_p [deg]	${79.67}_{- 0.77}^{+ 0.80}$ $79.67_{ - 0.77}^{ + 0.80}$
λ^(a) [deg]	${0.09}_{- 0.90}^{+ 0.88}$ $0.09_{ - 0.90}^{ + 0.88}$

Notes. The physical and orbital parameters for the WASP-122 system were adopted from Rodriguez et al. (2016), except for ^(a) value retrieved in this work and ^(b) adopted from Edwards et al. (2021). ^(c) T₁₄ is the total transit duration, between the first and fourth contacts of the transit.

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