The GAPS programme at TNG - LXII. Studies of atmospheric FeII winds in ultra-hot Jupiters KELT-9b and KELT-20b using the HARPS-N spectrograph

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Volume 692 (December 2024)

A&A, 692 (2024) A76

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Table 6

Detected Fe II lines in the transmission spectrum of KELT-20b.

Line	h [%]	FWHM [km s⁻¹]	K_p [km s⁻¹]	v_sys + v_wind [km s⁻¹]	v_sys [km s⁻¹]	R_λ [Rp]	Angle [deg]	^νmic[km s⁻¹ ]	^νmac[km s⁻¹]	R_eff [R_p]
λ4233.16	−0.29 ± 0.07	${160.76}_{- 16.78}^{+ 13.01}$ $160.76_{ - 16.78}^{ + 13.01}$	$- {23.62}_{- 0.61}^{+ 0.63}$ $- 23.62_{ - 0.61}^{ + 0.63}$	$- {24.90}_{- 0.50}^{+ 0.45}$ $- 24.90_{ - 0.50}^{ + 0.45}$	${29.00}_{- 8.09}^{+ 7.63}$ $29.00_{ - 8.09}^{ + 7.63}$	1.00 ± 0.02	${0.46}_{- 0.33}^{+ 0.40}$ $0.46_{ - 0.33}^{ + 0.40}$	${* 1.98}_{- 1.38}^{+ 2.66}$ $*1.98_{ - 1.38}^{ + 2.66}$	* ${19.93}_{- 4.96}^{+ 6.07}$ $19.93_{ - 4.96}^{ + 6.07}$	1.1 ± 0.02
λ4351.7	−0.17 ± 0.04	${117.07}_{- 47.48}^{+ 47.69}$ $117.07_{ - 47.48}^{ + 47.69}$	$- {25.63}_{- 2.25}^{+ 2.28}$ $- 25.63_{ - 2.25}^{ + 2.28}$	$- {25.30}_{- 0.70}^{+ 0.74}$ $- 25.30_{ - 0.70}^{ + 0.74}$	${21.82}_{- 10.88}^{+ 10.91}$ $21.82_{ - 10.88}^{ + 10.91}$	0.92 ± 0.03	${0.80}_{- 0.60}^{+ 1.18}$ $0.80_{ - 0.60}^{ + 1.18}$	* ${6.34}_{- 3.73}^{+ 6.74}$ $6.34_{ - 3.73}^{ + 6.74}$	${1.06}_{- 0.02}^{+ 0.01}$ $1.06_{ - 0.02}^{ + 0.01}$	${6.89}_{- 2.95}^{+ 5.64}$ $6.89_{ - 2.95}^{ + 5.64}$
λ4385.3	−0.14 ± 0.07	${133.42}_{- 33.82}^{+ 48.04}$ $133.42_{ - 33.82}^{ + 48.04}$	$- {22.24}_{- 2.73}^{+ 2.26}$ $- 22.24_{ - 2.73}^{ + 2.26}$	$- {24.12}_{- 0.41}^{+ 0.39}$ $- 24.12_{ - 0.41}^{ + 0.39}$	${27.36}_{- 6.71}^{+ 6.18}$ $27.36_{ - 6.71}^{ + 6.18}$	1.11 ± 0.02	${0.13}_{- 0.09}^{+ 0.09}$ $0.13_{ - 0.09}^{ + 0.09}$	${4.49}_{- 3.21}^{+ 4.28}$ $4.49_{ - 3.21}^{ + 4.28}$	* ${1.05}_{- 0.03}^{+ 0.02}$ $1.05_{ - 0.03}^{ + 0.02}$	${0.15}_{- 0.09}^{+ 0.07}$ $0.15_{ - 0.09}^{ + 0.07}$
λ4489.1	${6.51}_{- 3.02}^{+ 5.52}$ $6.51_{ - 3.02}^{ + 5.52}$	${101.71}_{- 50.26}^{+ 32.82}$ $101.71_{ - 50.26}^{ + 32.82}$	$- {23.20}_{- 1.36}^{+ 3.26}$ $- 23.20_{ - 1.36}^{ + 3.26}$	$- {24.07}_{- 0.56}^{+ 0.58}$ $- 24.07_{ - 0.56}^{ + 0.58}$	${45.27}_{- 9.95}^{+ 10.02}$ $45.27_{ - 9.95}^{ + 10.02}$	0.91 ± 0.03	${0.44}_{- 0.32}^{+ 0.52}$ $0.44_{ - 0.32}^{ + 0.52}$	* ${14.73}_{- 8.06}^{+ 7.38}$ $14.73_{ - 8.06}^{ + 7.38}$	** ${1.05}_{- 0.03}^{+ 0.02}$ $1.05_{ - 0.03}^{ + 0.02}$	1 05+0.02 . -0.03
λ4508.2	−0.12 ± 0.10	${4.92}_{- 2.38}^{+ 6.20}$ $4.92_{ - 2.38}^{ + 6.20}$	${178.47}_{- 30.94}^{+ 34.87}$ $178.47_{ - 30.94}^{ + 34.87}$	$- {23.84}_{- 2.05}^{+ 2.87}$ $- 23.84_{ - 2.05}^{ + 2.87}$	$- {23.90}_{- 0.66}^{+ 0.60}$ $- 23.90_{ - 0.66}^{ + 0.60}$	0.94 ± 0.03	${34.12}_{- 9.72}^{+ 9.78}$ $34.12_{ - 9.72}^{ + 9.78}$	* ${0.70}_{- 0.52}^{+ 1.18}$ $0.70_{ - 0.52}^{ + 1.18}$	** ${11.40}_{- 6.47}^{+ 8.51}$ $11.40_{ - 6.47}^{ + 8.51}$	1.04 ± 0.03
λ4515.33	$- {0.12}_{- 0.07}^{+ 0.05}$ $- 0.12_{ - 0.07}^{ + 0.05}$	${10.91}_{- 5.79}^{+ 10.00}$ $10.91_{ - 5.79}^{ + 10.00}$	${165.06}_{- 41.46}^{+ 37.92}$ $165.06_{ - 41.46}^{ + 37.92}$	$- {25.33}_{- 2.32}^{+ 2.01}$ $- 25.33_{ - 2.32}^{ + 2.01}$	$- {24.82}_{- 0.67}^{+ 0.57}$ $- 24.82_{ - 0.67}^{ + 0.57}$	0.99 ± 0.03	${29.17}_{- 9.29}^{+ 9.93}$ $29.17_{ - 9.29}^{ + 9.93}$	* ${1.39}_{- 0.96}^{+ 1.69}$ $1.39_{ - 0.96}^{ + 1.69}$	${11.02}_{- 6.37}^{+ 8.52}$ $11.02_{ - 6.37}^{ + 8.52}$	1.04 ± 0.02
λ4522.63	$- {0.24}_{- 0.07}^{+ 0.06}$ $- 0.24_{ - 0.07}^{ + 0.06}$	${5.23}_{- 1.47}^{+ 1.72}$ $5.23_{ - 1.47}^{ + 1.72}$	${174.00}_{- 12.19}^{+ 12.01}$ $174.00_{ - 12.19}^{ + 12.01}$	${24.13}_{- 0.70}^{+ 0.85}$ $24.13_{ - 0.70}^{ + 0.85}$	$- {25.02}_{- 0.37}^{+ 0.39}$ $- 25.02_{ - 0.37}^{ + 0.39}$	1.07 ± 0.02	${49.33}_{- 7.02}^{+ 6.61}$ $49.33_{ - 7.02}^{ + 6.61}$	${0.24}_{- 0.17}^{+ 0.47}$ $0.24_{ - 0.17}^{ + 0.47}$	${3.24}_{- 2.05}^{+ 2.76}$ $3.24_{ - 2.05}^{ + 2.76}$	1.08 ± 0.02
λ4555.89	$- {0.27}_{- 0.11}^{+ 0.13}$ $- 0.27_{ - 0.11}^{ + 0.13}$	${2.90}_{- 0.99}^{+ 1.71}$ $2.90_{ - 0.99}^{ + 1.71}$	${180.59}_{- 6.57}^{+ 7.60}$ $180.59_{ - 6.57}^{ + 7.60}$	$- {22.56}_{- 0.43}^{+ 0.51}$ $- 22.56_{ - 0.43}^{ + 0.51}$	$- {24.16}_{- 0.34}^{+ 0.35}$ $- 24.16_{ - 0.34}^{ + 0.35}$	1.14 ± 0.02	${37.37}_{- 6.44}^{+ 5.41}$ $37.37_{ - 6.44}^{ + 5.41}$	* ${0.15}_{- 0.10}^{+ 0.10}$ $0.15_{ - 0.10}^{ + 0.10}$	${* 1.65}_{- 1.14}^{+ 3.07}$ $*1.65_{ - 1.14}^{ + 3.07}$	1.09 ± 0.04
λ4583.83	−0.26 ± 0.05	${6.47}_{- 1.30}^{+ 1.51}$ $6.47_{ - 1.30}^{ + 1.51}$	${157.03}_{- 9.81}^{+ 10.37}$ $157.03_{ - 9.81}^{ + 10.37}$	$- {24.65}_{- 0.64}^{+ 0.65}$ $- 24.65_{ - 0.64}^{ + 0.65}$	$- {24.04}_{- 0.39}^{+ 0.42}$ $- 24.04_{ - 0.39}^{ + 0.42}$	1.09 ± 0.02	${44.18}_{- 6.50}^{+ 7.05}$ $44.18_{ - 6.50}^{ + 7.05}$	${0.16}_{- 0.16}^{+ 0.13}$ $0.16_{ - 0.16}^{ + 0.13}$	${2.50}_{- 1.60}^{+ 1.88}$ $2.50_{ - 1.60}^{ + 1.88}$	1.09 ± 0.02
λ4923.93	−0.41 ± 0.04	${9.37}_{- 1.00}^{+ 0.91}$ $9.37_{ - 1.00}^{ + 0.91}$	${163.88}_{- 6.69}^{+ 6.74}$ $163.88_{ - 6.69}^{ + 6.74}$	$- {24.21}_{- 0.44}^{+ 0.40}$ $- 24.21_{ - 0.44}^{ + 0.40}$	$- {24.24}_{- 0.33}^{+ 0.32}$ $- 24.24_{ - 0.33}^{ + 0.32}$	1.23 ± 0.02	${48.32}_{- 5.42}^{+ 6.07}$ $48.32_{ - 5.42}^{ + 6.07}$	${3.03}_{- 0.53}^{+ 0.52}$ $3.03_{ - 0.53}^{ + 0.52}$	${3.45}_{- 2.22}^{+ 2.10}$ $3.45_{ - 2.22}^{ + 2.10}$	1.14 ± 0.01
λ5018.43	−0.39 ± 0.04	${10.53}_{- 0.96}^{+ 1.09}$ $10.53_{ - 0.96}^{ + 1.09}$	${159.68}_{- 7.86}^{+ 7.86}$ $159.68_{ - 7.86}^{ + 7.86}$	$- {23.59}_{- 0.47}^{+ 0.45}$ $- 23.59_{ - 0.47}^{ + 0.45}$	$- {24.51}_{- 0.32}^{+ 0.32}$ $- 24.51_{ - 0.32}^{ + 0.32}$	1.22 ± 0.02	${38.03}_{- 5.69}^{+ 5.13}$ $38.03_{ - 5.69}^{ + 5.13}$	${1.80}_{- 0.66}^{+ 0.61}$ $1.80_{ - 0.66}^{ + 0.61}$	${5.33}_{- 1.88}^{+ 1.57}$ $5.33_{ - 1.88}^{ + 1.57}$	1.13 ± 0.11
λ5169.03	−0.56 ± 0.03	${11.19}_{- 0.83}^{+ 0.88}$ $11.19_{ - 0.83}^{ + 0.88}$	${167.66}_{- 5.39}^{+ 4.87}$ $167.66_{ - 5.39}^{ + 4.87}$	$- {23.88}_{- 0.33}^{+ 0.32}$ $- 23.88_{ - 0.33}^{ + 0.32}$	${24.46}_{- 0.20}^{+ 0.22}$ $24.46_{ - 0.20}^{ + 0.22}$	1.20 ± 0.01	${48.47}_{- 4.09}^{+ 3.85}$ $48.47_{ - 4.09}^{ + 3.85}$	${2.27}_{- 0.36}^{+ 0.44}$ $2.27_{ - 0.36}^{ + 0.44}$	${1.97}_{- 1.32}^{+ 1.65}$ $1.97_{ - 1.32}^{ + 1.65}$	1.19 ± 0.01
λ5197.57	$- {0.19}_{- 0.06}^{+ 0.05}$ $- 0.19_{ - 0.06}^{ + 0.05}$	${5.37}_{- 1.50}^{+ 2.30}$ $5.37_{ - 1.50}^{ + 2.30}$	${160.58}_{- 9.15}^{+ 12.06}$ $160.58_{ - 9.15}^{ + 12.06}$	$- {22.80}_{- 0.64}^{+ 0.62}$ $- 22.80_{ - 0.64}^{ + 0.62}$	$- {24.49}_{- 0.47}^{+ 0.52}$ $- 24.49_{ - 0.47}^{ + 0.52}$	1.17 ± 0.07	${38.53}_{- 7.36}^{+ 7.44}$ $38.53_{ - 7.36}^{ + 7.44}$	* ${0.14}_{- 0.10}^{+ 0.11}$ $0.14_{ - 0.10}^{ + 0.11}$	${* 4.51}_{- 3.42}^{+ 5.40}$ $*4.51_{ - 3.42}^{ + 5.40}$	1.07 ± 0.02
λ5234.62	−0.13 ± 0.03	${10.54}_{- 2.09}^{+ 2.77}$ $10.54_{ - 2.09}^{ + 2.77}$	${174.96}_{- 17.88}^{+ 22.51}$ $174.96_{ - 17.88}^{ + 22.51}$	$- {24.07}_{- 1.37}^{+ 1.34}$ $- 24.07_{ - 1.37}^{ + 1.34}$	$- {24.95}_{- 0.43}^{+ 0.40}$ $- 24.95_{ - 0.43}^{ + 0.40}$	1.24 ± 0.02	${39.50}_{- 6.45}^{+ 6.42}$ $39.50_{ - 6.45}^{ + 6.42}$	${3.03}_{- 1.58}^{+ 2.43}$ $3.03_{ - 1.58}^{ + 2.43}$	${6.07}_{- 4.11}^{+ 6.85}$ $6.07_{ - 4.11}^{ + 6.85}$	1.05 ± 0.01
λ5275.99	$- {0.20}_{- 0.05}^{+ 0.04}$ $- 0.20_{ - 0.05}^{ + 0.04}$	${9.25}_{- 2.71}^{+ 2.37}$ $9.25_{ - 2.71}^{ + 2.37}$	${166.43}_{- 12.49}^{+ 16.27}$ $166.43_{ - 12.49}^{ + 16.27}$	$- {23.54}_{- 1.33}^{+ 1.26}$ $- 23.54_{ - 1.33}^{ + 1.26}$	$- {24.22}_{- 0.43}^{+ 0.43}$ $- 24.22_{ - 0.43}^{ + 0.43}$	1.22 ± 0.03	${48.08}_{- 7.33}^{+ 7.17}$ $48.08_{ - 7.33}^{ + 7.17}$	${4.31}_{- 1.67}^{+ 2.00}$ $4.31_{ - 1.67}^{ + 2.00}$	${* 3.51}_{- 2.40}^{+ 3.00}$ $*3.51_{ - 2.40}^{ + 3.00}$	1.07 ± 0.02
λ5316.16	${0.28}_{- 0.04}^{+ 0.03}$ $0.28_{ - 0.04}^{ + 0.03}$	${9.31}_{- 1.40}^{+ 1.60}$ $9.31_{ - 1.40}^{ + 1.60}$	${152.15}_{- 10.53}^{+ 9.40}$ $152.15_{ - 10.53}^{ + 9.40}$	−23.16 ± 0.55	$- {24.99}_{- 0.38}^{+ 0.36}$ $- 24.99_{ - 0.38}^{ + 0.36}$	1.24 ± 0.02	${47.20}_{- 6.07}^{+ 5.64}$ $47.20_{ - 6.07}^{ + 5.64}$	${2.52}_{- 0.92}^{+ 1.20}$ $2.52_{ - 0.92}^{ + 1.20}$	${3.25}_{- 2.12}^{+ 2.78}$ $3.25_{ - 2.12}^{ + 2.78}$	1.10 ± 0.01
λ5362.86	−0.14 ± 0.04	${6.75}_{- 1.82}^{+ 2.54}$ $6.75_{ - 1.82}^{ + 2.54}$	${134.80}_{- 15.07}^{+ 13.65}$ $134.80_{ - 15.07}^{ + 13.65}$	−23.92 ± 0.93	$- {24.51}_{- 0.54}^{+ 0.55}$ $- 24.51_{ - 0.54}^{ + 0.55}$	1.19 ± 0.03	${43.13}_{- 7.46}^{+ 9.18}$ $43.13_{ - 7.46}^{ + 9.18}$	* ${3.42}_{- 2.35}^{+ 4.30}$ $3.42_{ - 2.35}^{ + 4.30}$	${* 5.37}_{- 3.74}^{+ 7.17}$ $*5.37_{ - 3.74}^{ + 7.17}$	1.05 ± 0.01

Notes. The values marked with an asterisk “*” are consistent with 0 km s⁻¹, while a double asterisk “**” indicates values that could not be determined through the MCMC analysis.

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