论文标题
从长期径向速度随访中确认proxima c的期望
Expectations for the confirmation of Proxima c from a long-term radial velocity follow-up
论文作者
论文摘要
使用径向速度法检测到Proxima C是候选第二个行星，旋转的proxima centauri。宣布的长轨道周期（5.21 $^{+0.26} _ { - 0.22} $年）和诱导多普勒信号的小半幅度（1.2 $ \ pm $ 0.4 m/s），使该检测具有挑战性，并且在接下来的几年中值得进行随访的目标。我们打算评估未来数据对检测通过现实模拟的径向速度的统计意义的影响，将在2019 - 2023年期间范围内添加到已发布的数据集中，直到一个轨道时期C的一个轨道时期。我们发现，Proxima C的检测意义不仅取决于收集的数据量，还取决于所使用的工具数量，尤其是观察活动涵盖的时间板。但是，平均而言，我们没有得到强有力的统计证据，我们预测，在最佳情况下，在接下来的5年中，对Proxima C的检测可能会在4 $σ$水平下变得显着。相反，如果Proxima C不存在，则检测到的信号可能会将其显着性降低至2 $σ$。
Proxima c, a candidate second planet orbiting Proxima Centauri, was detected with the radial velocity method. The announced long orbital period (5.21$^{+0.26}_{-0.22}$ years), and small semi-amplitude of the induced Doppler signal (1.2$\pm$0.4 m/s), make this detection challenging and the target worthy of a follow-up in the next years. We intend to evaluate the impact of future data on the statistical significance of the detection through realistic simulated radial velocities to be added to the published dataset, spanning up to one orbital period of Proxima c in the time range 2019-2023. We find that the detection significance of Proxima c increases depending not only on the amount of data collected, but also on the number of instruments used, and especially on the timespan covered by the observational campaign. However, on average we do not get strong statistical evidence and we predict that, in the best-case scenario, in the next 5 years the detection of Proxima c can become significant at 4$σ$ level. If instead Proxima c does not exist, the detected signal may lower its significance down to 2$σ$.
