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 1

Physical and orbital parameters of the KELT-9 and KELT-20 systems.

Parameter	KELT-9	KELT-20
	Stellar parameters
T_eff (K)	9600 ± 400	$8980_{- 130}^{+ 90}$ $8980_{ - 130}^{ + 90}$
log g (cgs)	4.1 ± 0.3	4.31 ± 0.02
[Fe/H]	0.14 ± 0.30	−0.02 ± 0.07
M_★ (M_⊙)	2.32 ± 0.16	${1.89}_{- 0.05}^{+ 0.06}$ $1.89_{ - 0.05}^{ + 0.06}$
R_★ (R_⊙)	2.418 ± 0.058	1.60 ± 0.06
v sin i_★ (km s⁻¹)	111.4 ± 1.3 ^(a)	114±3
K_★ (m s⁻¹)	293 ± 32	<311.3
	Planet parameters
M_p (M_J)	2.88 ± 0.35	<3.510
R_p (R_J)	1.936 ± 0.047	1.83 ± 0.07
T_eq (K)	$3921_{- 174}^{+ 182}$ $3921_{ - 174}^{ + 182}$	2260 ± 50
K_p (km s⁻¹)	236.4 ± 9.0 ^(e)	157.4 ± 17.1^(f)
	Transit parameters
T₀ (BJD_TDB)	2 459 006.3289 ^(b)	2457 503.120120 ^(g)
	±0.0001	±0.00018
P (d)	1.4811188 ^(b)	3.47410196 ^(g)
	±0.0000003	±0.00000106
T₁₄ (h)	0.15949 ± 0.00011^(c)System parameters	${0.14882}_{- 0.00090}^{+ 0.00092}$ $0.14882_{ - 0.00090}^{ + 0.00092}$
a (au)	0.03368 ± 0.00078	${0.0542}_{- 0.0021}^{+ 0.0014}$ $0.0542_{ - 0.0021}^{ + 0.0014}$
i_p (deg)	86.79 ± 0.25 ^(d)	${86.15}_{- 0.27}^{+ 0.28}$ $86.15_{ - 0.27}^{ + 0.28}$
λ (deg)	-85.78 ± 0.23 ^(b)	3.9 ± 1.1 ^(h)
e (deg)	0 (fixed)	0 (fixed)

Notes. The physical and orbital parameters for KELT-9 were adopted from Borsa et al. (2019), except for ^(a)adopted from Gaudi et al. (2017), ^(b)Pino et al. (2022), ^(c) Pai Asnodkar et al. (2022), ^(d)Wyttenbach et al. (2020), and ^(e)retrieved in this work from single line analysis. The physical and orbital parameters for KELT-20 were adopted from Talens et al. (2018), except for ^(f)retrieved in this work, ^(g)adopted from Casasayas-Barris et al. (2019), and ^(h) adopted from Singh et al. (2024).

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