Gaussian processes for radial velocity modeling - Better rotation periods and planetary parameters with the quasi-periodic kernel and constrained priors

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Volume 674 (June 2023)

A&A, 674 (2023) A108

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Table 5

Median value of the standard deviation distance between the derived and simulated orbital periods, RV semi-amplitudes, and eccentricities for different stellar activity configurations or all simulations.

Configuration	K+W	K+GP I	K+GP II	K+GP III	K+GP IV
Orbital periods (median of standard deviation distance, smaller is better)
Random, t_spot = P_rot = 22 days	1.120	0.679	0.915	0.654	0.800
Random, t_spot = 5P_rot = 110 days	5.667	0.794	0.846	0.803	0.808
Two act. long., t_spot = P_rot = 22 days	1.057	0.672	0.777	0.730	0.704
Two act. long., t_spot = 5P_rot = 110 days	0.982	0.812	0.856	0.773	0.754
all 24000 simulations	2.207	0.739	0.849	0.740	0.766
RV semi-amplitudes (median of standard deviation distance, smaller is better)
random, t_spot = P_rot = 22 days	0.875	0.731	0.721	0.692	0.696
Random, t_spot = 5P_rot = 110 days	3.370	10.245	10.268	13.489	13.485
Two act. long., t_spot = P_rot = 22 days	0.883	0.647	0.646	0.679	0.688
Two act. long., t_spot = 5P_rot = 110 days	0.748	0.723	0.742	0.709	0.706
All 24000 simulations	1.469	3.086	3.094	3.892	3.894
Eccentricity (median of standard deviation distance, smaller is better)
Random, t_spot = P_rot = 22 days	2.546	2.519	2.586	1.938	2.275
Random, t_spot = 5P_rot = 110 days	4.590	2.187	2.247	1.589	1.589
Two act. long., t_spot = P_rot = 22 days	2.536	2.305	2.336	2.081	2.352
Two act. long., t_spot = 5P_rot = 110 days	2.692	2.267	2.679	2.106	1.909
All 24000 simulations	3.091	2.320	2.462	1.929	2.031

Notes. Bold font highlights the best models.

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