KOBE-1: The first planetary system from the KOBE survey - Two planets likely residing in the sub-Neptune mass regime around a late K-dwarf

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Volume 694 (February 2025)

A&A, 694 (2025) A15

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Table F.7

Prior and posterior distributions for the best RV model (2p1c2c), with inferred planetary properties.

Parameter	Prior^a	Posterior
m [m s⁻¹ d⁻¹]	𝒰(−0.05, 0.05)	−(7.2 ± 3.2) 10⁻³
q [m s⁻¹ d⁻²]	𝒰(−0.01, 0.01)	−(7.6 ± 2.6) 10⁻⁶
γ [ms⁻¹]	𝒰(−23 330.6, –23 255.7)	$- {23 295.14}_{- 0.84}^{+ 0.85}$ ${ - 23295.14_{ - 0.84}^{ + 0.85}}$
σ_jit [m s⁻¹]	ℳ𝓛𝒰(1.9, 24.9)	${2.17}_{- 0.32}^{+ 0.34}$ ${2.17_{ - 0.32}^{ + 0.34}}$

P_b [d]	𝓛𝒰(1.1, 100.0)	${8.5399}_{- 0.0036}^{+ 0.0037}$ ${8.5399_{ - 0.0036}^{ + 0.0037}}$
K_b [m s⁻¹]	𝒰(0.0, 14.0)	3.75 ± 0.48
T_0,b [d]	𝒰(2 459 397.6, 2 459 497.6)	${2 459 484.26}_{- 0.30}^{+ 0.29}$ ${2459484.26_{ - 0.30}^{ + 0.29}}$
e_b	Fixed to 0

P_c [d]	𝓛𝒰(1.1, 100.0)	${29.671}_{- 0.052}^{+ 0.050}$ $29.671_{ - 0.052}^{ + 0.050}$
K_c [m s⁻¹]	𝒰(0.0, 14.0)	3.50 ± 0.45
T_0,c [d]	𝒰(2 459 397.6, 2 459 497.6)	2 459 448.2 ± 1.2
e_c	Fixed to 0

Planet	Parameter	Inferred value

	Orbit semi-major axis, a_b [au]	0.07006 ± 0.00043
	Relative orbital separation, a_b/R_⋆	${24.33}_{- 0.32}^{+ 0.33}$ $24.33_{ - 0.32}^{ + 0.33}$
KOBE-1 b	Minimum mass, m_b sin i_b [M_⊕]	8.80 ± 0.76
	Isolation flux, S_b [S_⊕]	20.56 ± 0.25
	Equilibrium temperature, T_{eq, b} [K]	594.4 ± 5.3

	Orbit semi-major axis, a_c [au]	0.16071 ± 0.00099
	Relative orbital separation, a_c /R_⋆	${55.81}_{- 0.73}^{+ 0.75}$ $55.81_{ - 0.73}^{ + 0.75}$
KOBE-1 c	Minimum mass, m_c sin i_c [M_⊕]	12.4 ± 1.1
	Isolation flux, S_c [S_⊕]	3.910 ± 0.047
	Equilibrium temperature, T_{eq, c} [K]	392.5 ± 3.5

Notes. ^(a) See Sect. 4.1.2 for details on the selection of these priors.

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