Characterization of AF Lep b at high spectral resolution with VLT/HiRISE

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Volume 696 (April 2025)

A&A, 696 (2025) A6

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Table 3

ForMoSA results on AF Lep b for two nights of observation.

Priors ^(a)	T_eff (K)	log g (dex)	[Fe/H] (dex)	C/O	RV (km s⁻¹)	υ sin i (km s⁻¹)	R^(b) (R_Jup)	∆ log z^(c)
2023-11-20

—	$930_{- 83}^{+ 51}$ $930_{ - 83}^{ + 51}$	${3.22}_{- 0.15}^{+ 0.23}$ $3.22_{ - 0.15}^{ + 0.23}$	$- {0.13}_{- 0.22}^{+ 0.26}$ $- 0.13_{ - 0.22}^{ + 0.26}$	${0.47}_{- 0.15}^{+ 0.12}$ $0.47_{ - 0.15}^{ + 0.12}$	${31.68}_{- 1.14}^{+ 1.20}$ $31.68_{ - 1.14}^{ + 1.20}$	${10.09}_{- 2.42}^{+ 2.74}$ $10.09_{ - 2.42}^{ + 2.74}$	${2.37}_{- 0.60}^{+ 0.46}$ $2.37_{ - 0.60}^{ + 0.46}$	0
T_eff, log g	$812_{- 26}^{+ 23}$ $812_{ - 26}^{ + 23}$	${3.68}_{- 0.10}^{+ 0.09}$ $3.68_{ - 0.10}^{ + 0.09}$	${0.07}_{- 0.27}^{+ 0.24}$ $0.07_{ - 0.27}^{ + 0.24}$	${0.39}_{- 0.14}^{+ 0.15}$ $0.39_{ - 0.14}^{ + 0.15}$	${32.04}_{- 1.26}^{+ 1.28}$ $32.04_{ - 1.26}^{ + 1.28}$	${11.60}_{- 2.97}^{+ 3.14}$ $11.60_{ - 2.97}^{ + 3.14}$	${1.40}_{- 0.16}^{+ 0.20}$ $1.40_{ - 0.16}^{ + 0.20}$	−1
T_eff, log g, [Fe/H]	$808_{- 25}^{+ 55}$ $808_{ - 25}^{ + 55}$	${3.68}_{- 0.10}^{+ 0.09}$ $3.68_{ - 0.10}^{ + 0.09}$	${0.50}_{- 0.19}^{+ 0.16}$ $0.50_{ - 0.19}^{ + 0.16}$	${0.57}_{- 0.08}^{+ 0.07}$ $0.57_{ - 0.08}^{ + 0.07}$	${31.77}_{- 1.25}^{+ 1.20}$ $31.77_{ - 1.25}^{ + 1.20}$	${12.44}_{- 2.83}^{+ 2.69}$ $12.44_{ - 2.83}^{ + 2.69}$	${1.39}_{- 0.16}^{+ 0.19}$ $1.39_{ - 0.16}^{ + 0.19}$	−2
T_eff, log g, [Fe/H], C/O	$811_{- 25}^{+ 22}$ $811_{ - 25}^{ + 22}$	${3.68}_{- 0.10}^{+ 0.08}$ $3.68_{ - 0.10}^{ + 0.08}$	${0.47}_{- 0.16}^{+ 0.15}$ $0.47_{ - 0.16}^{ + 0.15}$	${0.57}_{- 0.06}^{+ 0.05}$ $0.57_{ - 0.06}^{ + 0.05}$	${31.77}_{- 1.16}^{+ 1.16}$ $31.77_{ - 1.16}^{ + 1.16}$	${12.27}_{- 2.63}^{+ 2.46}$ $12.27_{ - 2.63}^{ + 2 + 46}$	${1.39}_{- 0.16}^{+ 0.19}$ $1.39_{ - 0.16}^{ + 0.19}$	−1

2023-11-23 offset 1

—	$880_{- 116}^{+ 86}$ $880_{ - 116}^{ + 86}$	${3.51}_{- 0.33}^{+ 0.37}$ $3.51_{ - 0.33}^{ + 0.37}$	$- {0.06}_{- 0.2}^{+ 0.32}$ $- 0.06_{ - 0.2}^{ + 0.32}$	${0.28}_{- 0.12}^{+ 0.17}$ $0.28_{ - 0.12}^{ + 0.17}$	${32.10}_{- 1.33}^{+ 1.35}$ $32.10_{ - 1.33}^{ + 1.35}$	${11.09}_{- 4.08}^{+ 4.07}$ $11.09_{ - 4.08}^{ + 4.07}$	${1.72}_{- 0.60}^{+ 0.80}$ $1.72_{ - 0.60}^{ + 0.80}$	0
T_eff, log g	$814_{- 25}^{+ 23}$ $814_{ - 25}^{ + 23}$	${3.66}_{- 0.09}^{+ 0.09}$ $3.66_{ - 0.09}^{ + 0.09}$	$- {0.01}_{- 0.26}^{+ 0.32}$ $- 0.01_{ - 0.26}^{ + 0.32}$	${0.21}_{- 0.08}^{+ 0.15}$ $0.21_{ - 0.08}^{ + 0.15}$	${31.95}_{- 1.34}^{+ 1.36}$ $31.95_{ - 1.34}^{ + 1.36}$	${11.16}_{- 4.35}^{+ 3.85}$ $11.16_{ - 4.35}^{ + 3.85}$	${1.44}_{- 0.16}^{+ 0.19}$ $1.44_{ - 0.16}^{ + 0.19}$	−1
T_eff, log g, [Fe/H]	$805_{- 26}^{+ 24}$ $805_{ - 26}^{ + 24}$	${3.67}_{- 0.09}^{+ 0.09}$ $3.67_{ - 0.09}^{ + 0.09}$	${0.54}_{- 0.22}^{+ 0.23}$ $0.54_{ - 0.22}^{ + 0.23}$	${0.43}_{- 0.15}^{+ 0.11}$ $0.43_{ - 0.15}^{ + 0.11}$	${32.17}_{- 1.32}^{+ 1.18}$ $32.17_{ - 1.32}^{ + 1.18}$	${10.99}_{- 4.42}^{+ 3.72}$ $10.99_{ - 4.42}^{ + 3.72}$	${1.42}_{- 0.16}^{+ 0.18}$ $1.42_{ - 0.16}^{ + 0.18}$	−1
T_eff, log g, [Fe/H], C/O	$809_{- 25}^{+ 24}$ $809_{ - 25}^{ + 24}$	${3.66}_{- 0.09}^{+ 0.09}$ $3.66_{ - 0.09}^{ + 0.09}$	${0.63}_{- 0.18}^{+ 0.19}$ $0.63_{ - 0.18}^{ + 0.19}$	${0.51}_{- 0.07}^{+ 0.06}$ $0.51_{ - 0.07}^{ + 0.06}$	${32.19}_{- 1.33}^{+ 1.21}$ $32.19_{ - 1.33}^{ + 1.21}$	${11.45}_{- 4.23}^{+ 3.42}$ $11.45_{ - 4.23}^{ + 3.42}$	${1.43}_{- 0.17}^{+ 0.19}$ $1.43_{ - 0.17}^{ + 0.19}$	−0.5

2023-11-23 offset 2

–	$897_{- 107}^{+ 71}$ $897_{ - 107}^{ + 71}$	${3.50}_{- 0.33}^{+ 0.29}$ $3.50_{ - 0.33}^{ + 0.29}$	$- {0.12}_{- 0.18}^{+ 0.21}$ $- 0.12_{ - 0.18}^{ + 0.21}$	${0.15}_{- 0.04}^{+ 0.07}$ $0.15_{ - 0.04}^{ + 0.07}$	${32.92}_{- 1.56}^{+ 1.46}$ $32.92_{ - 1.56}^{ + 1.46}$	${17.36}_{- 2.51}^{+ 3.29}$ $17.36_{ - 2.51}^{ + 3.29}$	${1.74}_{- 0.51}^{+ 0.81}$ $1.74_{ - 0.51}^{ + 0.81}$	0
T_eff, log g	$841_{- 40}^{+ 38}$ $841_{ - 40}^{ + 38}$	${3.56}_{- 0.15}^{+ 0.15}$ $3.56_{ - 0.15}^{ + 0.15}$	$- {0.03}_{- 0.17}^{+ 0.22}$ $- 0.03_{ - 0.17}^{ + 0.22}$	${0.15}_{- 0.03}^{+ 0.06}$ $0.15_{ - 0.03}^{ + 0.06}$	${32.87}_{- 1.57}^{+ 1.47}$ $32.87_{ - 1.57}^{ + 1.47}$	${17.23}_{- 2.55}^{+ 3.49}$ $17.23_{ - 2.55}^{ + 3.49}$	${1.62}_{- 0.28}^{+ 0.35}$ $1.62_{ - 0.28}^{ + 0.35}$	−2
T_eff, log g, [Fe/H]	$805_{- 24}^{+ 24}$ $805_{ - 24}^{ + 24}$	${3.68}_{- 0.09}^{+ 0.09}$ $3.68_{ - 0.09}^{ + 0.09}$	${0.36}_{- 0.21}^{+ 0.23}$ $0.36_{ - 0.21}^{ + 0.23}$	${0.19}_{- 0.06}^{+ 0.12}$ $0.19_{ - 0.06}^{ + 0.12}$	${32.55}_{- 1.59}^{+ 1.50}$ $32.55_{ - 1.59}^{ + 1.50}$	${17.20}_{- 3.15}^{+ 6.55}$ $17.20_{ - 3.15}^{ + 6.55}$	${1.41}_{- 0.16}^{+ 0.19}$ $1.41_{ - 0.16}^{ + 0.19}$	−3
T_eff, log g, [Fe/H], C/O	$814_{- 25}^{+ 24}$ $814_{ - 25}^{ + 24}$	${3.65}_{- 0.09}^{+ 0.08}$ $3.65_{ - 0.09}^{ + 0.08}$	${0.63}_{- 0.19}^{+ 0.21}$ $0.63_{ - 0.19}^{ + 0.21}$	${0.43}_{- 0.08}^{+ 0.07}$ $0.43_{ - 0.08}^{ + 0.07}$	${32.10}_{- 1.64}^{+ 1.54}$ $32.10_{ - 1.64}^{ + 1.54}$	${16.76}_{- 3.40}^{+ 7.08}$ $16.76_{ - 3.40}^{ + 7.08}$	${1.46}_{- 0.16}^{+ 0.18}$ $1.46_{ - 0.16}^{ + 0.18}$	−4.5

Notes. ^(a) The definition of the priors is provided in Table 2. ^(b)R represents the self consistent radius using Newton’s law with the corresponding value of log g and estimated value of mass (3.68 ± 0.48 M_Jup) from Balmer et al. (2025). ^(c) For each night, ∆ log z indicates the difference in log z between the specific case being analysed and the cas where all parameters are free.

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