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Damasso, M; Del Sordo, F
Monthly notices of the Royal Astronomical Society, 05/2020, Letnik: 494, Številka: 1Journal Article
ABSTRACT Proxima c, a candidate second planet orbiting Proxima Centauri, was detected with the radial velocity method. The announced long orbital period (5.21$^{+0.26}_{-0.22}$ yr), and small semi-amplitude of the induced Doppler signal (1.2 ± 0.4 $\rm{\,m\,s^{-1}}$), make this detection challenging and a target worthy of a follow-up in the years to come. We intend to evaluate the impact of future data on the statistical significance of the detection through realistic simulated radial velocities to be added to the published data set, spanning up to one orbital period of Proxima c in the time range 2019–2023. We find that the detection significance of Proxima c increases depending not only on the amount of data collected, but also on the number of instruments used, and especially on the time-span covered by the observational campaign. However, on average, we do not get strong statistical evidence, and we predict that, in the best-case scenario, in the next five years the detection of Proxima c can become significant at the 4-σ level. If instead Proxima c does not exist, the detected signal may lower its significance down to 2 σ.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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