The overflowing atmosphere of WASP-121 b - High-resolution He I λ10833 transmission spectroscopy with VLT/CRIRES+

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Volume 692 (December 2024)

A&A, 692 (2024) A230

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Table 1

Relevant system parameters of WASP-121.

Parameter	Value	Source ^(a)
T_eff,★ (K)	6460 ±140	D 16
M_★ (M_⊙)	${1.358}_{- 0.084}^{+ 0.075}$ $1.358_{ - 0.084}^{ + 0.075}$	D 16
R_★ (R_⊙)	${1.458}_{- 0.03}^{+ 0.03}$ $1.458_{ - 0.03}^{ + 0.03}$	D16
d (pc)	${263.2}_{- 0.7}^{+ 0.7}$ $263.2_{ - 0.7}^{ + 0.7}$	DR3
a (au)	${0.02596}_{- 0.00063}^{0.00043}$ $0.02596_{ - 0.00063}^{0.00043}$	B20
T₀ (BJD_TDB)	2 458 119.72074 ± 0.00017	B20
P_orb (d)	${1.27492504}_{- 1.4 \times 10^{- 7}}^{1.5 \times 10^{- 7}}$ $1.27492504_{ - 1.4 \times {{10}^{ - 7}}}^{1.5 \times {{10}^{ - 7}}}$	B20
i_orb (deg)	88.49 ± 0.16	B20
v sin(i_★) (km s⁻¹)	${13.56}_{- 0.68}^{+ 0.69}$ $13.56_{ - 0.68}^{ + 0.69}$	D16
R_p R_★⁻¹	${0.12355}_{- 0.00029}^{0.00033}$ $0.12355_{ - 0.00029}^{0.00033}$	B20
M_p (M_J)	1.157 ± 0.070	B20
q^(b)	8.135 × 10⁻⁴	B20
γ^(c) (km s⁻¹)	38.350 ± 0.021	D16
R_P (R_Jup)	1.753 ± 0.036	B20
R_side (R_Jup)	1.770	TW
R_pole (R_Jup)	1.735	TW

Notes. ^(a)D16: Delrez et al. (2016), B20: Bourrier et al. (2020), DR3: Gaia Data Release 3 (Gaia Collaboration 2023), TW: This work. ^(b)Ratio of planetary and stellar mass. ^(c)Systemic radial velocity.

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