论文标题
行星环可以解释髋关节41378F的极低密度吗？
Can planetary rings explain the extremely low density of HIP 41378f?
论文作者
论文摘要
透过行星周围的环的存在可能导致其半径被高估，并导致其密度低估，如果已知质量。我们采用贝叶斯框架来表明，过渡长期Planet Hip $ \，$ 41378 $ \，F $的异常低密度（$ \ sim $ 0.09 g cm $ {^{ - 3}} $）可能是由于存在不透明的圆周公寓式的。鉴于我们采用的模型先验和来自K2任务的数据，我们发现环形行星场景的统计证据与仅行星场景的统计证据相当。环形行星解决方案表明，$ \ sim $ 1.23 $ \，$ g $ \，$ cm $^{ - 3} $类似于王国的行星密度。相关环从行星半径的1.05倍至2.59倍，并以$ \ sim $ 25 $^\ mathrm {o} $从天平面倾斜。髋关节$ \，$ 41378 $ \，F $的未来高精度过境观察值是确认/驳回行星戒指的存在是必要的。
The presence of rings around a transiting planet can cause its radius to be overestimated and lead to an underestimation of its density if the mass is known. We employ a Bayesian framework to show that the anomalously low density ($\sim$0.09 g cm${^{-3}}$) of the transiting long-period planet HIP$\,$41378$\,f$ might be due to the presence of opaque circum-planetary rings. Given our adopted model priors and data from the K2 mission, we find the statistical evidence for the ringed planet scenario to be comparable to that of the planet-only scenario. The ringed planet solution suggests a larger planetary density of $\sim$1.23$\,$g$\,$cm$^{-3}$ similar to Uranus. The associated ring extends from 1.05 to 2.59 times the planetary radius and is inclined away from the sky-plane by $\sim$25$^\mathrm{o}$. Future high-precision transit observations of HIP$\,$41378$\,f$ would be necessary to confirm/dismiss the presence of planetary rings.
