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 5

Fitted and derived parameters of AF Lep b with orvara.

Parameter	Prior	Median and 1σ errors
Fitted parameters

Primary mass M_⋆ (M_⊙)	𝒩 (1.2,0.06)	${1.218}_{- 0.039}^{+ 0.029}$ $1.218_{ - 0.039}^{ + 0.029}$
Secondary mass M_p (M_Jup)	1/M (log-flat)	${3.61}_{- 0.48}^{+ 0.49}$ $3.61_{ - 0.48}^{ + 0.49}$
Semi-major axis a (au)	1/a (log-flat)	${8.996}_{- 0.077}^{+ 0.19}$ $8.996_{ - 0.077}^{ + 0.19}$
$\sqrt{e} sin ω$ $\sqrt e \sin \omega$	𝒰(0,1)	${0.08}_{- 0.12}^{+ 0.11}$ $0.08_{ - 0.12}^{ + 0.11}$
$\sqrt{e} sin ω$ $\sqrt e \sin \omega$	𝒰(0,1)	$- {0.028}_{- 0.078}^{+ 0.089}$ $- 0.028_{ - 0.078}^{ + 0.089}$
Inclination i (°)	sin i with i ϵ [0°, 180°] (Uniform on sin i)	${57.50}_{- 0.65}^{+ 0.61}$ $57.50_{ - 0.65}^{ + 0.61}$
Mean longitude^(a) λ_ref (°)	𝒰(0,360)	${353.2}_{- 3.6}^{+ 8.6}$ $353.2_{ - 3.6}^{ + 8.6}$
Ascending node Ω (°)	𝒰(0,360)	${248.54}_{- 2.2}^{+ 0.91}$ $248.54_{ - 2.2}^{ + 0.91}$
Parallax ϖ (mas)	𝒩 (37.254, 0.019)	${37.254}_{- 0.019}^{+ 0.019}$ $37.254_{ - 0.019}^{ + 0.019}$

Derived parameters

Period P (years)	–	${24.38}_{- 0.41}^{+ 1.1}$ $24.38_{ - 0.41}^{ + 1.1}$
Argument of periastron ω (°)	–	$121_{- 43}^{+ 158}$ $121_{ - 43}^{ + 158}$
Eccentricity e	–	${0.015}_{- 0.011}^{+ 0.029}$ $0.015_{ - 0.011}^{ + 0.029}$
Time of periastron^(b) t₀ (JD)	–	$2458231_{- 1095}^{+ 3683}$ $2458231_{ - 1095}^{ + 3683}$
Mass ratio $\frac{M_{p}}{M_{⋆}}$ ${{{M_p}} \over {{M_ \star }}}$	–	${0.00284}_{- 0.00036}^{+ 0.00036}$ $0.00284_{ - 0.00036}^{ + 0.00036}$

Notes. ^(a)The mean longitude $λ_{ref}^{*}$ $\lambda _{{\rm{ref}}}^*$ is computed at reference epoch t_ref = 2455197.4 JD (J2010.0). ^(b)The time of periastron is computed as $t_{0} = t_{r e f} - P \frac{λ_{ref} - ω}{360^{°}}$ ${t_0} = {t_{ref}} - P{{{\lambda _{{\rm{ref}}}} - \omega } \over {{{360}^^\circ }}}$

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