A transiting hot Jupiter with two outer siblings orbiting an intermediate-mass post-main-sequence star

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Volume 706 (February 2026)

A&A, 706 (2026) A20

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Table A.1

Comparison of different radial velocity models.

model	$_{o r b i t}^{T O I - 375 c}$ $^{TOI-375c}_{orbit}$	$_{o r b i t}^{T O I - 375 d}$ $^{TOI-375d}_{orbit}$	${R V}_{t r e n d}^{l i n e a r}$ $\mathrm{RV}^{linear}_{trend}$	log(z)	N_params	AIC	BIC
A	circular	circular	no	−321.3	18	678.6	718.0
B	circular	circular	yes	−328.4	20	696.8	740.6
C	circular	elliptic	no	−322.4	20	684.8	728.6
D	circular	elliptic	yes	−328.0	22	700.0	748.2
E	elliptic	circular	no	−324.4	20	688.8	732.6
F	elliptic	circular	yes	−332.4	22	708.8	757.0
G	elliptic	elliptic	no	−323.4	22	690.8	739.0
H	elliptic	elliptic	yes	−326.5	24	701.0	753.6
model	$_{o r b i t}^{T O I - 375 c}$ $^{TOI-375c}_{orbit}$	$_{o r b i t}^{T O I - 375 d}$ $^{TOI-375d}_{orbit}$	$_{o r b i t}^{T O I - 375 e}$ $^{TOI-375e}_{orbit}$	log(z)	N_params	AIC	BIC
I	circular	circular	circular	−323.6	21	689.2	735.2
J	circular	circular	elliptic	−326.2	23	698.4	748.8
K	circular	elliptic	circular	−322.9	23	691.8	742.2
L	circular	elliptic	elliptic	−331.5	25	713.0	767.7
M	elliptic	circular	circular	−322.6	23	691.2	741.6
N	elliptic	circular	elliptic	−325.9	25	701.8	756.5
O	elliptic	elliptic	circular	−324.9	25	699.8	754.5
P	elliptic	elliptic	elliptic	−332.5	27	719.0	778.1

Notes. Models A trough H consists of three planets with uniform priors for the period of the two outer planets: 100-200 and 200-500 days, respectively, and with or without a linear trend. Model I trough P consist of four planets with uniform priors for the period of the three outer planets:10-100, 100-200, and 200-500 days, respectively. All models have a Gaussian prior for the epoch and period of TOI-375b provided by the light curve model.

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