Exploring the surface of HD 189733 via Doppler shadow analysis of planetary transits

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Volume 709 (May 2026)

A&A, 709 (2026) A16

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Table 1

HD 189733’s system parameters used in this work.

Parameter	Value	References
P_rot (days)	${11.454}_{- 0.088}^{+ 0.092}$ $Mathematical equation: $11.454_{ - 0.088}^{ + 0.092}$$	Cr24
i_star (^◦)	${71.87}_{- 6.91}^{+ 5.55}$ $Mathematical equation: $71.87_{ - 6.91}^{ + 5.55}$$	Cr24
i_planet (^◦)	${85.465}_{- 0.021}^{+ 0.020}$ $Mathematical equation: $85.465_{ - 0.021}^{ + 0.020}$$	Cr24
λ (^◦)	$- {1.00}_{- 0.23}^{+ 0.22}$ $Mathematical equation: $ - 1.00_{ - 0.23}^{ + 0.22}$$	Cr24
a_planet (R_star)	${8.7686}_{- 0.0082}^{+ 0.0082}$ $Mathematical equation: $8.7686_{ - 0.0082}^{ + 0.0082}$$	Cr24
R_planet (R_star)	${0.1602}_{- 0.0035}^{+ 0.0039}$ $Mathematical equation: $0.1602_{ - 0.0035}^{ + 0.0039}$$	Cr24
∆ϕ_p,0	$- {0.002424}_{- 0.00035}^{+ 0.00036}$ $Mathematical equation: $ - 0.002424_{ - 0.00035}^{ + 0.00036}$$	Cr24
∆ϕ_p,1	$- {0.002300}_{- 0.00044}^{+ 0.00035}$ $Mathematical equation: $ - 0.002300_{ - 0.00044}^{ + 0.00035}$$	Cr24
R_star (R_⊙)	${0.766}_{- 0.013}^{+ 0.007}$ $Mathematical equation: $0.766_{ - 0.013}^{ + 0.007}$$	Tr09
T_eff (K)	4969 ± 43	So18
T₀ (MBJD)	${53988.30339}_{- 0.000039}^{+ 0.000072}$ $Mathematical equation: $53988.30339_{ - 0.000039}^{ + 0.000072}$$	Tr09
P_orbit (days)	${2.21857312}_{- 0.00000076}^{+ 0.00000036}$ $Mathematical equation: $2.21857312_{ - 0.00000076}^{ + 0.00000036}$$	Tr09
[Fe/H] (dex)	−0.07 ± 0.02	So18
log (g)	4.60 ±0.01	So18

Notes. P_rot is the rotation period of the HD 189733, i_star is the stellar inclination, i_planet is the orbital inclination of the planet, λ is the spin-orbit angle, a_planet (R_star) is the semi-major axis in units of the stellar radius, R_planet (R_star) is the planetary radius in units of the stellar radius. ∆ϕ_p,0 and ∆ϕ_p,1 are dimensionless correction factors for the respective transit epochs of the transits of 11 August 2021 and 31 August 2021. R_star is the stellar radius, T_eff is the effective temperature, T₀ is the transit epoch of the planet, Porbit is the orbital period of the planet, [Fe/H] is the stellar metalicity, and log (g) is the surface gravity of HD 189733. (Cr24) Cristo et al. (2024); (Tr09) Triaud et al. (2009); (So18) Sousa et al. (2018).

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