A sub-Earth-mass planet orbiting Barnard’s star | Astronomy & Astrophysics (A&A)

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Volume 690 (October 2024)

A&A, 690 (2024) A79

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Table 4

Bayesian evidence of models evaluating the 233 d candidate.

Name	Model	N_pl	N_par	ln $Z$ $\[\mathcal{Z}\]$	Δ ln $Z$ $\[\mathcal{Z}\]$
P233: E18, E19 (N_point = 149 × 2)

D	A+cycN	0	26	−447.2	0.0
N1	D+1peN0.5	1	31	−449.4	−2.2
N2	D+1peU50	1	31	−449.6	−2.4
S1	D+1peU100	1	31	−	−
S2	D+1peU100	1	31	−	−

P233: E18, E19, H15, HAN, CAR (N_point = 792 × 2)

K1	GP+cycU	0	39	−4123.0	0.0
O1	K1+1peU50	1	44	−4123.5	−0.5

Notes. Model selection based on Bayesian evidence evaluating the 233 d candidate planet. Different models as in Table 3. Model S1 and S2 are simulations with injected planets. N and U indicate normal and uniform priors, N0.5 for $N$ $\[\mathcal{N}\]$ (P_orb, σ_P) with P_orb = 233 d and σ_P = 0.5 d. U50 and U100 for $U$ $\[\mathcal{U}\]$ /(200, x) with x = 250 and 300 d. Here, npe indicates n Keplerian orbits.

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