Table C.1
Priors used within juliet to model the YZ Ceti multiplanetary system.
| Parameter name | Prior | Units | Description |
|---|---|---|---|
| Planet b | |||
| Pb |  |
d | Period |
| t0,b − 2 450 000 |  |
d | Time of transit-center |
| Kb |  |
m s−1 | Radial-velocity semi-amplitude |
| eb |  |
… | Eccentricity of the orbit |
| ωb |  |
deg | Argument of periastron passage of the orbit |
| Planet c | |||
| Pc |  |
d | Period |
| t0,c − 2 450 000 |  |
d | Time of transit-center |
| Kc |  |
m s−1 | Radial-velocity semi-amplitude |
| ec |  |
… | Eccentricity of the orbit |
| ωc |  |
deg | Argument of periastron passage of the orbit |
| Planet d | |||
| Pd |  |
d | Period |
| t0,d − 2 450 000 |  |
d | Time of transit-center |
| Kd |  |
m s−1 | Radial-velocity semi-amplitude |
| ed |  |
… | Eccentricity of the orbit |
| ωd |  |
deg | Argument of periastron passage of the orbit |
| RV parameters | |||
| μHARPS-PRE |  |
m s−1 | Systemic velocity for HARPS before fiber upgrade |
| σHARPS-PRE |  |
m s−1 | Extra jitter term for HARPS before fiber upgrade |
| μHARPS-POST |  |
m s−1 | Systemic velocity for HARPS after fiber upgrade |
| σHARPS-POST |  |
m s−1 | Extra jitter term for HARPS after fiber upgrade |
| μCARMENES |  |
m s−1 | Systemic velocity for CARMENES |
| σCARMENES |  |
m s−1 | Extra jitter term for CARMENES |
Notes. The prior labels 
and 
represent uniform, and Jeffrey’s distributions (Jeffreys 1946). The planetary and RV priors were not changed between models with different numbers of planets. The GP hyperparameter priors for four different runs are shown in Table 6.
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