论文标题
从径向速度法揭示的系外行星的固有多重性分布
The intrinsic multiplicity distribution of exoplanets revealed from the radial velocity method
论文作者
论文摘要
行星多重性在限制行星系统的形成和演变方面很有用，但通常很难在观察上限制。在这里，我们开发了一种通用方法，该方法可以正确考虑调查不完整并恢复内在的行星多样性分布。然后，我们将其应用于加利福尼亚传统调查（CLS）的径向速度（RV）行星样本。在$ 1 \，$ au（$ 10 \，$ au）区域内，我们发现$ 21 \ pm 4 \％$ $（$ 19.2 \ pm 2.8 \％$）的阳光恒星带有群众超过$ 10 \，m_ \ oplus $（$ 0.3 \，$ 0.3 \，$ _ _ _ {\ rm j} $ 30 \％（均为30 \％）的群众;就RV半振幅$ K $而言，$ 33 \ pm 7 \％$（$ 25 \ pm 3 \％$）类似太阳的星星包含$ k> 1 \，$ m/s（$ 3 \，$ m/s）的行星，每个系统宿主的平均$ 1.8 \ pm 0.4 $ 0.4 $ 0.4 $ 0.4 $ 0.4 $ 0.63 \ pm 0.16 $ 0.16 $ 0.16 $ 0.16 $ 0.16 $）。我们注意到，类似CLS太阳样本中的热木星速率高于$ \ sim $ 1 \％的共识值约为三倍。我们还确认了关于内部（$ <1 \，$ au）和外部（$> 1 \，$ au）行星之间相关性的先前研究。
Planet multiplicities are useful in constraining the formation and evolution of planetary systems but usually difficult to constrain observationally. Here, we develop a general method that can properly take into account the survey incompleteness and recover the intrinsic planet multiplicity distribution. We then apply it to the radial velocity (RV) planet sample from the California Legacy Survey (CLS). Within the $1\,$au ($10\,$au) region, we find $21 \pm 4\%$ ($19.2 \pm 2.8\%$) of Sun-like stars host planets with masses above $10\,M_\oplus$ ($0.3\,M_{\rm J}$), about 30\% (40\%) of which are multi-planet systems; in terms of the RV semi-amplitude $K$, $33 \pm 7\%$ ($25 \pm 3\%$) of Sun-like stars contain planets of $K>1\,$m/s ($3\,$m/s), and each system hosts on average $1.8 \pm 0.4$ ($1.63 \pm 0.16$) planets. We note that the hot Jupiter rate in the CLS Sun-like sample is higher than the consensus value of $\sim$1\% by a factor of about three. We also confirm previous studies on the correlation between inner ($<1\,$au) and outer ($>1\,$au) planets.
