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Table A.1

Default priors used for the GP kernels.

Parameter Prior Unit Description
dSHO-GP kernel parameters
PGP 𝒰/𝒩 d Period, uniform range for explorative fits; normal distribution centred on the stellar rotation period for RV and photometric fits, with at least three times the uncertainty of the period as the standard deviation of the normal distribution
σGp 𝒰 (0, 50)/𝒥(1, 1 X 106) m s−1/ppm Standard deviation of the GP, uniform for RVs and log-uniform for photometry
fGP 𝒰 (0, 1) Fractional amplitude of secondary mode
Q0,GP 𝒥 (0.1, 1 × 105) Quality factor of secondary mode
dQGP 𝒥 (0.1, 1 × 105) Difference in quality factor between primary and secondary mode
QP-GP kernel parameters
PGP 𝒰/𝒩 d Period of the GP quasi-periodic component
σGP 𝒥 (1, 1 × 106) ppm Amplitude of the GP component
ΓGP 𝒰 (0, 10) Amplitude of the GP sine-squared component
αGP 𝒰 (0, 10) d−2 Inverse length-scale of the GP exponential component
QPC-GP kernel parameters
PGP 𝒰/𝒩 d Period of the GP quasi-periodic component
σGP 𝒥 (1, 1 × 106) ppm Amplitude of the GP
h1 𝒥 (1, × 105) m s−1 Amplitude of the quasi-periodic component
h2 𝒥 (1, 1 × 105) m s−1 Amplitude of the cosine component

Notes. The prior labels 𝒰, 𝒥, and 𝒩 represent uniform, log-uniform, and normal distributions, respectively.

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