Homogeneous search for helium in the atmosphere of 11 gas giant exoplanets with SPIRou

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Volume 677 (September 2023)

A&A, 677 (2023) A164

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Table 2

System parameters of the first eight planets.

Parameters	Symbol (unit)	AU Mic b	GJ1214 b	GJ3470 b	HAT-P-11 b
Star

Stellar mass	M_⋆ (M_⊙)	0.50 ± 0.03⁽¹⁾	0.178 ± 0.010⁽³⁾	0.51 ± 0.06⁽⁴⁾	0.802 ± 0.028⁽⁶⁾
Stellar radius	R_⋆ (R_⊙)	0.86 ± 0.05⁽¹⁸⁾	0.215 ± 0.008⁽³⁾	0.48 ± 0.04⁽⁴⁾	0.683 ± 0.009⁽⁶⁾
Stellar age	(Gyr)	0.022 ± 0.003⁽¹⁾	3−10⁽¹⁴⁾	1.65 ± 1.35⁽⁴⁾	⁽¹³⁾
Limb darkening coefficient	u₁	0.2348	0.0775	0.0866	0.2673
Limb darkening coefficient	u₂	0.3750	0.3627	0.3499	0.2649
Stellar metallicity	Fe/H (dex)	–	0.29 ± 0.12⁽³⁾	0.2 ± 0.1⁽⁴⁾	0.31 ± 0.05⁽⁶⁾
Stellar temperature	T_eff (K)	3700 ± 100⁽¹⁾	3250 ± 100⁽³⁾	3652 ± 50⁽⁴⁾	4780 ± 50⁽⁶⁾
Surface gravity	log(g) (cgs)	4.39 ± 0.03⁽¹⁾	5.026 ± 0.040⁽³⁾	4.658 ± 0.035⁽⁴⁾	4.59 ± 0.03⁽⁶⁾
Spectral type		M1V	M4V	M1.5V	K4V

Planet

Planetary mass	M_p (M_⊕)	11.7 ± 5⁽¹⁾	8.17 ± 0.43⁽³⁾	13.9 ± 1.5⁽⁴⁾	27.74 ± 3.11⁽⁶⁾
Planetary radius	R_p (R_⊕)	3.55 ± 0.13⁽¹⁹⁾	2.742 ± 0.17⁽³⁾	4.57 ± 0.18⁽⁴⁾	4.36 ± 0.06⁽⁶⁾
Density	ρ (cgs)	1.25 ± 0.75⁽¹⁹⁾	2.20 ± 0.17⁽³⁾	0.93 ± 0.56⁽⁴⁾	1.84 ± 0.21
Equilibrium temperature	T_eq (K)	593 ± 21⁽¹⁾	596 ± 19⁽³⁾	615 ± 16⁽⁴⁾	787 ± 11
Orbital period	P (days)	8.463000(2)⁽¹⁾	1.58040433(13)⁽³⁾	3.3366413(6)⁽⁴⁾	4.887802443(34)⁽⁶⁾
Mid-transit time (-2450 000)	T0 (days)	8330.39051(15)⁽¹⁾	5701.413328(66)⁽³⁾	6677.727712(22)⁽⁴⁾	4957.8132067(53)⁽⁶⁾
Transit duration	t_i4 (h)	3.51 ± 0.1⁽¹⁹⁾	0.8688 ± 0.0029⁽³⁾	1.918 ± 0.024⁽⁴⁾	2.3565 ± 0.0015⁽⁶⁾
Semi-amplitude	K_⋆ (m s⁻¹)	5.8 ± 2.5⁽¹⁾	14.36 ± 0.53⁽³⁾	8.21 ± 0.47⁽⁴⁾	12.01 ± 1.38⁽⁶⁾
Semi-major axis	a(R_⋆)	18.95 ± 0.35⁽¹⁹⁾	14.85 ± 0.16⁽³⁾	12.92 ± 0.72⁽⁴⁾	16.50 ± 0.18⁽⁶⁾
Inclination	i (deg)	89.5 ± 0.3⁽²⁾	88.7 ± 0.1⁽³⁾	88.88 ± 0.62⁽⁵⁾	89.05 ± 0.15⁽⁶⁾
Impact parameter	b (R_⊙)	0.17 ± 0.11⁽¹⁹⁾	0.325 ± 0.025⁽³⁾	0.29 ± 0.14⁽⁵⁾	0.209 ± 0.032⁽¹⁵⁾
Eccentricity	e	0	0	0.114 ± 0.052⁽⁴⁾	0.2644 ± 0.0006⁽⁶⁾
Periastron argument	ω	90	90	-82.5 ± 5.7⁽⁴⁾	342.186 ± 0.179⁽⁶⁾

Parameters	Symbol (unit)	WASP-11 b	WASP-39 b	WASP-52 b	WASP-69 b
Star

Stellar mass	M_⋆ (M_⊙)	0.81 ± 0.04⁽⁷⁾	0.913 ± 0.047⁽⁹⁾	0.87 ± 0.03⁽¹⁰⁾	0.826 ± 0.029⁽¹¹⁾
Stellar radius	R_⋆ (R_⊙)	0.772 ± 0.015⁽⁷⁾	0.939 ± 0.022⁽⁹⁾	0.79 ± 0.24⁽¹⁰⁾	0.813 ± 0.028⁽¹¹⁾
Stellar age	(Gyr)				~2⁽¹²⁾
Limb darkening coefficient	u₁	0.2465	0.1767	0.2321	0.2696
Limb darkening coefficient	u₂	0.2721	0.2942	0.2773	0.2617
Stellar metallicity	Fe H (dex)	0.12 ± 0.09⁽⁷⁾	0.01 ± 0.09⁽⁹⁾	0.03 ± 0.12⁽¹⁰⁾	0.144 ± 0.077⁽¹²⁾
Stellar temperature	T_eff (K)	4900 ± 65⁽⁷⁾	5485 ± 50⁽⁹⁾	5000 ± 100⁽¹⁰⁾	4715 ± 50⁽¹²⁾
Surface gravity	log(g) (cgs)	4.569 ± 0.018⁽⁷⁾	4.453 ± 0.012⁽⁹⁾	4.582 ± 0.014⁽¹⁰⁾	4.535 ± 0.023⁽¹²⁾
Spectral type		K3	G8	K2	K5

Planet

Planetary mass	M_p (M_⊕)	156 ± 8⁽⁷⁾	89.3 ± 10.2⁽⁹⁾	146.2 ± 6.36⁽¹⁰⁾	82.64 ± 5.88⁽¹¹⁾
Planetary radius	R_p (R_⊕)	11.10 ± 0.25⁽⁷⁾	14.34 ± 0.45⁽⁹⁾	14.24 ± 0.34⁽¹⁰⁾	11.85 ± 0.19⁽¹¹⁾
Density	ρ (cgs)	0.632 ± 0.035⁽⁷⁾	0.167 ± 0.023⁽⁹⁾	0.29 ± 0.03⁽¹⁰⁾	0.262 ± 0.047⁽¹¹⁾
Equilibrium temperature	T_eq (K)	992 ± 14⁽⁷⁾	1166 ± 14⁽⁹⁾	1315 ± 35⁽¹⁰⁾	963 ± 18⁽¹¹⁾
Orbital period	P (days)	3.7224790(3)⁽⁸⁾	4.0552941(34)⁽⁹⁾	1.7497798(12)⁽¹⁰⁾	3.8681390(6)⁽⁸⁾
Mid-transit time (-2450 000)	T0 (days)	6200.28683(9)⁽⁸⁾	5342.96913(63)⁽⁹⁾	5793.68143(9)⁽¹⁰⁾	7176.17789(17)⁽⁸⁾
Transit duration	t₁₄ (h)	2.58 ± 0.91⁽⁷⁾	2.80 ± 0.02⁽⁹⁾	1.81 ± 0.012⁽¹⁰⁾	2.23 ± 0.03⁽¹¹⁾
Semi-amplitude	K_⋆ (m s⁻¹)	82.7 ± 4.2⁽⁷⁾	37.9 ± 5.4⁽⁹⁾	109.6 ± 4.4⁽¹⁰⁾	38.1 ± 2.4⁽¹¹⁾
Semi-major axis	a(R_⋆)	12.19 ± 0.21⁽⁷⁾	11.37 ± 0.24⁽⁹⁾	7.38 ± 0.11⁽¹⁰⁾	12.00 ± 0.46⁽¹¹⁾
Inclination	i (deg)	89.03 ± 0.34⁽⁷⁾	87.32 ± 0.17⁽⁹⁾	85.35 ± 0.2⁽¹⁰⁾	86.71 ± 0.20⁽¹¹⁾
Impact parameter	b(R_⊙)	0.054 ± 0.168⁽¹⁶⁾	0.447 ± 0.055⁽¹⁷⁾	0.60 ± 0.02⁽¹⁰⁾	0.686 ± 0.023⁽¹¹⁾
Eccentricity	e	0	0	0	0
Periastron argument	ω	90	90	90	90

References. ⁽¹⁾Zicher et al. (2022). ⁽²⁾Martioli et al. (2021). ⁽³⁾Cloutier et al. (2021). ⁽⁴⁾Kosiarek et al. (2019). ⁽⁵⁾Biddle et al. (2014). ⁽⁶⁾Allart et al. (2018).⁽⁷⁾ Mancini et al. (2015). ⁽⁸⁾Kokori et al. (2022).⁽⁹⁾ Mancini et al. (2018). ⁽¹⁰⁾Hébrard et al. (2013). ⁽¹¹⁾Casasayas-Barris et al. (2017). ⁽¹²⁾Anderson et al. (2014). ⁽¹³⁾Bakos et al. (2010). ⁽¹⁴⁾Charbonneau et al. (2009). ⁽¹⁵⁾Huber et al. (2017).⁽¹⁶⁾West et al. (2009). ⁽¹⁷⁾Maciejewski et al. (2016). ⁽¹⁸⁾Gallenne et al. (2022). ⁽¹⁹⁾Szabó et al. (2022).

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