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Table B.3

Orbital elements using a model of three Keplerian plus a Gaussian process.

N Meas 211

γ  [m s-1] 28 301.00 ± 0.30 ΔV21  [m s-1] 0.01 ± 0.60
[28 300.37,2831.62] [− 1.62,0.85]

GP hyperparameters

σJ [m s-1] 0.13 ± 0.28 [m s-1] 0.64 ± 0.46
[0.00,0.95] [0.00,1.64]
log 10(A) [m s-1] 0.14 ± 0.12 [d] 79 ± 17
[− 0.021,0.348] [51,114]
log 10(τ) [d] 0.68 ± 0.27 ϵ 1.02 ± 0.29
[0.28,1.40] [0.54,1.50]

YZ Cet b YZ Cet c YZ Cet d

P [days] 1.96876 ± 0.00021 3.06008 ± 0.00022 4.65627 ± 0.00042
[1.96858,1.96934] [3.05958,3.06051] [4.65565,4.65740]
K [m s-1] 1.48 ± 0.25 1.68 ± 0.23 1.72 ± 0.23
[0.92,1.92] [1.22,2.13] [1.13,2.09]
e [0...1[ 0.00 ± 0.12 0.04 ± 0.11 0.129 ± 0.096
[0.00,0.41] [0.00,0.37] [0.000,0.311]
λ0 at BJDref = 2 456 845.73 [deg] 233.9 ± 9.4 298.8 ± 8.3 319.9 ± 8.8
[215.0,254.2] [283.5,316.4] [297.8,333.4]

0.02 ± 0.27 −0.19 ± 0.21 −0.06 ± 0.22
[− 0.61,0.43] [− 0.48,0.32] [− 0.41,0.43]
−0.04 ± 0.26 −0.07 ± 0.24 0.36 ± 0.22
[− 0.47,0.56] [− 0.63,0.26] [− 0.28,0.55]
Msini [MEarth] 0.75 ± 0.13 0.98 ± 0.14 1.14 ± 0.17
[0.436,0.964] [0.675,1.267] [0.723,1.389]
a [au] 0.01557 ± 0.00052 0.02090 ± 0.00070 0.02764 ± 0.00093
[0.01444,0.01661] [0.01938,0.02229] [0.02564,0.02948]
Teq for AB = [0.75, 0] [K] [347, 491] [299, 423] [260, 368]
BJDTrans−2 456 846.0 [days] 0.911 ± 0.095 1.05 ± 0.14 1.44 ± 0.16
[0.723,1.137] [0.74,1.35] [1.16,1.79]
Trans. Prob. [%] 5.7 4.1 2.9

Notes. Values correspond to the maximum-a-posteriori of the MCMC, with errors being the standard deviation of the MCMC samples. In the second line we report the 95% highest-density interval.

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