论文标题
从开普勒数据中的太阳能恒星周围的岩石可居住区行星的发生
The Occurrence of Rocky Habitable Zone Planets Around Solar-Like Stars from Kepler Data
论文作者
论文摘要
我们介绍了基于开普勒DR25行星候选目录和基于GAIA的恒星特性的主要序列矮星恒星的可居住区（Hz）中岩石行星的发生率。我们从依赖星际的Instellation Flux方面提供了第一个分析，这使我们能够跟踪HZ行星。我们将$η_\ oplus $定义为Hz的发生，半径为0.5至1.5 $ r_ \ oplus $绕行的星星，有效温度在4800 K和6300 K之间。我们发现保守的Hz的$η_\ oplus $在保守的Hz之间是$ 0.37^wirme $ 0.37^{+0.37^{+0.48} $ 0.48} $（0.48）间隔）和$ 0.60^{+0.90} _ { - 0.36} $每星星，而乐观的Hz出现在$ 0.58^{+0.73} _ { - 0.33} $和$ 0.88^{+1.88^{+1.28} {+1.28} _ { - 0.51} $ planets $ planets $ planets $ planets $ / star。这些界限反映了关于可用DR25完整性数据的轨道周期之外的完整性外推外的两个极端假设。大的不确定性是由于检测到的小型行星数量少。我们发现使用泊松可能性贝叶斯分析和近似贝叶斯计算的可能发生率。我们的结果得到了目录完整性和可靠性的纠正。完整性和行星的发生率都取决于出色的有效温度。我们还提出了各种恒星种群和行星大小范围的发生率。我们以$ 95 \％$的信心估计，平均而言，G和K矮人周围最近的HZ行星约6 pc，并且在太阳10 pc的G和K矮人周围大约有4 Hz岩石行星。
We present occurrence rates for rocky planets in the habitable zones (HZ) of main-sequence dwarf stars based on the Kepler DR25 planet candidate catalog and Gaia-based stellar properties. We provide the first analysis in terms of star-dependent instellation flux, which allows us to track HZ planets. We define $η_\oplus$ as the HZ occurrence of planets with radius between 0.5 and 1.5 $R_\oplus$ orbiting stars with effective temperatures between 4800 K and 6300 K. We find that $η_\oplus$ for the conservative HZ is between $0.37^{+0.48}_{-0.21}$ (errors reflect 68\% credible intervals) and $0.60^{+0.90}_{-0.36}$ planets per star, while the optimistic HZ occurrence is between $0.58^{+0.73}_{-0.33}$ and $0.88^{+1.28}_{-0.51}$ planets per star. These bounds reflect two extreme assumptions about the extrapolation of completeness beyond orbital periods where DR25 completeness data are available. The large uncertainties are due to the small number of detected small HZ planets. We find similar occurrence rates using both a Poisson likelihood Bayesian analysis and Approximate Bayesian Computation. Our results are corrected for catalog completeness and reliability. Both completeness and the planet occurrence rate are dependent on stellar effective temperature. We also present occurrence rates for various stellar populations and planet size ranges. We estimate with $95\%$ confidence that, on average, the nearest HZ planet around G and K dwarfs is about 6 pc away, and there are about 4 HZ rocky planets around G and K dwarfs within 10 pc of the Sun.
