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Table 3
Parameters of the model using the full dataset.
| Parameter | Priors | GP | GP + 1 Signal | GP + 2 Signals |
|---|---|---|---|---|
| Keplerian | ||||
| Period [days] |  (2, 20) |
11.18427 |
11.18418 |
|
| K [m s−1] |  (0, 5) |
1.377 |
1.368 |
|
| e |  (0, 1) |
0.124 |
0.109 |
|
| TP − 2 450 000 [d] |  (8525, 8535) |
8530.1 |
8530.2 |
|
| ω [rad] |  (− π, π) |
–1.32 |
–1.19 |
|
| Derived parameters | ||||
| Semi-major axis [AU] | 0.04855 |
0.04857 |
||
| Mass sin (i)D00 [M⊕] | 1.15 |
1.16 |
||
| Mass sin (i)M 15 [M⊕] | 1.173 |
1.173 |
||
| Sinusoidal | ||||
| Period [days] |  (2, 20) |
5.168 |
||
| K [m s−1] |  (0, 5) |
0.35 |
||
| T0 − 2 450 000 [d] |  (8525, 8535) |
8530.47 |
||
| Activity model | ||||
| BGP RV [(m s−1)2] |  (0.1, 50) |
3.13 |
4.63 |
4.65 |
| BGP FWHM [(m s−1)2] |  (0.1, 300) |
191 |
152 |
153 |
| PGP [d] |  (30, 300) |
87.0 |
87.5 |
87.0 |
| LGP [d] |  (30, 300) |
109 |
67 |
68 |
| log CGP |  (−600, 600) |
–300 |
–300 |
–300 |
| Noise | ||||
| JitUVES RV [m s−1] |  (0, 5) |
1.47 |
0.72 |
0.72 |
| JitH pre15 RV [m s−1] |  (0, 5) |
1.41 |
0.78 |
0.76 |
| JitH post15 RV [m s−1] |  (0, 5) |
0.92 |
0.108 |
0.093 |
| JitE pre RV [m s−1] |  (0, 5) |
1.15 |
0.33 |
0.213 |
| JitE post RV [m s−1] |  (0, 5) |
1.22 |
0.058 |
0.065 |
| JitH pre15 FWHM [m s−1] |  (0, 5) |
2.11 |
2.03 |
2.02 |
| JitH post15 FWHM [m s−1] |  (0, 5) |
2.21 |
1.96 |
1.98 |
| JitE pre FWHM [m s−1 ] |  (0, 5) |
0.071 |
0.070 |
0.064 |
| JitE post FWHM [m s−1 ] |  (0, 5) |
0.101 |
0.105 |
0.113 |
| Polynomial terms | ||||
| V0UVES RV [m s−1 ] |  (−10, 10) |
0.1 |
0.6 |
0.6 |
| V0H pre 15 RV [m s−1 ] |  (−10, 10) |
0.72 |
0.91 |
0.87 |
| V0H post15 RV [m s−1 ] |  (−10, 10) |
–0.21 |
–0.5 |
–0.5 |
| V0E pre RV [m s−1 ] |  (−10, 10) |
–0.5 |
–1.1 |
–1.1 |
| V0E post RV [m s−1 ] |  (−10, 10) |
1.5 |
0.8 |
0.9 |
| Lin RV [m s−1 −d ] |  (−0.1, 0.1) |
–0.00008 |
0.00021 |
0.00009 |
| V0H pre15 FWHM [m s−1 ] |  (−10, 10) |
5.7 |
6.1 |
5.9 |
| V0H post15 FWHM [m s−1 ] |  (−10, 10) |
–3.6 |
–4.1 |
–3.9 |
| V0E pre FWHM [m s−1 ] |  (−10, 10) |
–4 |
–4.9 |
–4.9 |
| V0E post FWHM [m s−1 ] |  (−10, 10) |
–8 |
–9 |
–10 |
| Lin FWHM [m s−1 −d ] |  (−0.1, 0.1) |
0.0033 |
–0.0035 |
–0.0035 |
| Residuals | ||||
| RMS res [m s−1 ] | 1.57 | 1.10 | 1.07 | |
| RMS resUVES [m s−1 ] | 1.48 | 0.78 | 0.79 | |
| RMS resHARPS [m s−1 ] | 1.72 | 1.33 | 1.30 | |
| RMS resESPRESSO [m s−1 ] | 1.15 | 0.37 | 0.28 | |
| log Z | –1469 | –1405 | –1398 |
Notes. Mass sin (i)D00 shows the minimum mass of Proxima b using the Delfosse et al. (2000) estimation for the mass of Proxima, and Mass sin (i)M 15 shows the minimum mass using the Mann et al. (2015) estimation.
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