Time-resolved absorption of six chemical species with MAROON-X points to a strong drag in the ultra-hot Jupiter TOI-1518 b

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Volume 698 (May 2025)

A&A, 698 (2025) A314

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Table 2

TOI-1518 stellar and planetary parameters from Cabot et al. (2021).

Stellar parameters	Value
Stellar radius	1.950 ± 0.048 R_⊙
Effective temperature	7300 ± 100 K
Metallicity [Fe/H]	−0.1 ± 0.12 dex
Rotational velocity	85.1 ± 6.3 km s⁻¹
Spectral type	F0

Planetary parameters	Value

Planet mass	1.83 ± 0.47 $M_{J}^{a}$ $M_{\mathrm{J}}^{a}$
Planet radius	1.875 ± 0.053 R_J
Equilibrium temperature	$2546_{- 36}^{+ 35} K^{a}$ $2546_{-36}^{+35} \mathrm{~K}^{a}$

System parameters	Value

Orbital period	1.90261131	±
	0.00000043 days^a
Mid-transit Time	2458787.04943	±
	0.00028 BJD_TDB^a
Orbital Inclination	77.626 ± 0.097 degrees^a
Semi-major axis	0.03712 ± 0.00082 AU^a
Systemic Velocity (V_sys)	−13.94 ± 0.17 km s⁻¹
Projected orbital velocity (K_p)	207.32 ± 4.51 km s⁻¹ ★
Impact Parameter (b)	${0.9036}_{- 0.0053}^{+ 0.0061}$ $0.9036_{-0.0053}^{+0.0061}$

Notes. ★: Derived from Eq. (1). Recent observations from SOPHIE (described in Appendix A) provide updates for some of them (marked with^a).

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