HADES RV Programme with HARPS-N at TNG - XIII. A sub-Neptune around the M dwarf GJ 720 A

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Table 3

Comparison of different solutions for GJ 720 A using juliet.

Model⁽¹⁾	Parameters	Description		BIC⁽²⁾
BM	γ₀	RV offset	–394	798
	σ	RV jitter

BM+GP	σ_GP	Amplitude of GP	–315	660
	α_GP	Inverse (squared) length scale
	Γ_GP	Amplitude of the sine-part
	P_{rot, GP}	Period of GP
BM+GP+LT	Slope	Slope RV data	–312	665
	Inter.	Intercept coeff.

BM+1pl	P, T₀, e, ω, K	Planet params	–346	718

BM+GP+1pl	...	...	–298	650
BM+GP+1pl+LT	...	...	–295	655

BM+2pl	...	...	–319	698
BM+GP+2pl	...	...	–299	667

Notes. ⁽¹⁾ BM stands for the base model containing RV offsets and jitter. GP corresponds to a quasi-periodic GP kernel and 1pl means one planet model. ⁽²⁾ BIC corresponds to the Bayesian Information Criterion.

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