Table A.4
Summary of all hyperparameters of the different models applied to GJ 720 A RVs implemented with juliet with their corresponding priors and uncertainties.
| σGP | αGP | ΓGP | Prot, GP | P | T0 | e | ω | K | |
|---|---|---|---|---|---|---|---|---|---|
| (m s−1) | (day−2) | ... | (days) | (days) | (BJD) | ... | (deg) | (m s−1) | |
| BM + GP |  (0, 15) |
 (10−20, 10−5) |
 (0.01, 100) |
 (1, 1000) |
... | ... | ... | ... | ... |
| BM+GP+LT(*) |  (0, 15) |
 (10−20, 10−3) |
 (0.01, 15) |
 (1, 1000) |
... | ... | ... | ... | ... |
| BM+1pl | ... | ... | ... | ... |  (1, 50) |
 (0,50) |
 (0, 0.8) |
 (0, 360) |
 (0, 10) |
| BM + GP + 1pl(1) |  (0, 10) |
 (10−11, 10−3) |
 (0.01, 100) |
 (1, 1000) |
 (19.5, 0.5) |
 (0,15) |
 (0, 0.8) |
 (0, 360) |
 (0, 10) |
| BM+GP+1pl(2) |  (0, 10) |
 (10−11, 10−6) |
 (0.01, 100) |
 (30, 50) |
 (19.5, 0.5) |
 (0,15) |
 (0, 0.8) |
 (0, 360) |
 (0, 10) |
| BM + GP + 1pl + LT(*) |  (0, 15) |
 (10−20, 10−3) |
 (0.01, 100) |
 (1, 1000) |
 (19.5, 0.5) |
 (0,15) |
 (0, 0.8) |
 (0, 360) |
 (0, 10) |
| BM+2pl | ... | ... | ... | ... |  (19.5, 0.5) |
 (0,30) |
 (0, 0.8) |
 (0, 360) |
 (0, 10) |
| ... | ... | ... | ... |  (42.1, 0.1) |
 (0,40) |
 (0, 0.8) |
 (0, 360) |
 (0, 10) |
|
| BM + GP + 2pl |  (0, 15) |
 (10−11, 10−3) |
 (0.01, 100) |
 (1, 1000) |
 (19.5, 0.5) |
 (0,15) |
 (0, 0.8) |
 (0, 360) |
 (0, 10) |
| ... | ... | ... | ... |  (42.1, 0.5) |
 (0,50) |
... | ... |  (0, 10) |
|
Notes. * The LT hyperparameters are rvinterc and rvslope indicating the intercept and slope parameters, respectively. Their priors were set with a uniform distribution,
.
(1),(2) : The difference between these two models is the prior of the GP Prot
parameter. For the first model the Prot
was set with a wide prior value (1–1000) days (including all possible RV signals) while the second one was set around the value of the possible rotation period of the star (30–50) days. The prior labels of
,
and
represent normal, uniform, and Jeffrey distribution, respectively. The reference time for
T0 is BJD-2 456 400. All the models include the BM model that includes the RV zero point and an extra jitter term for the HARPS-N RVs, their hyperparameters and priors value were set as
and
, respectively.
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