论文标题
尘土飞扬的圆盘：内部空腔结构和迁移行星的停止位置
Dusty circumbinary discs: inner cavity structures and stopping locations of migrating planets
论文作者
论文摘要
我们介绍了由气体和灰尘组成的环形盘的两流体流体动力学模拟的结果，有和没有嵌入的行星，以检查灰尘对潮汐截断的内部腔体和迁移行星停车位的影响。在这项概念验证的研究中，我们考虑开普勒16和-34类似物，并检查具有$ 10^{ - 4} \ le st \ le st \ le st \ le 10^{ - 1} $和尘埃-GAS与1.01和1的灰尘数量的粉尘流体，我们发现只有0.01和1的灰尘比率。与无尘模拟相比，嵌入的行星。但是，对于由于尘埃漂移和积累而产生的统一尘埃与总和的增强，我们发现灰尘可以通过缩小和循环内部空腔来产生巨大的效果，从而使行星的停车位置更接近中央二进制。这项工作证明了在环形圆盘和行星研究中同时考虑气体和尘埃的重要性，并提供了一种潜在的方法来解释诸如Kepler-34b之类的环形行星的轨道特性，而Kepler-34B迄今难以使用仅使用气体流体动力学模拟来解释它们。
We present the results of two-fluid hydrodynamical simulations of circumbinary discs consisting of gas and dust, with and without embedded planets, to examine the influence of the dust on the structure of the tidally truncated inner cavity and on the parking locations of migrating planets. In this proof-of-concept study, we consider Kepler-16 and -34 analogues, and examine dust fluids with Stokes numbers in the range $10^{-4} \le St \le 10^{-1}$ and dust-to-gas ratios of 0.01 and 1. For the canonical dust-to-gas ratio of 0.01, we find the inclusion of the dust has only a minor effect on the cavity and stopping locations of embedded planets compared to dust-free simulations. However, for the enhanced dust-to-gas ratio of unity, assumed to arise because of significant dust drift and accumulation, we find that the dust can have a dramatic effect by shrinking and circularising the inner cavity, which brings the parking locations of planets closer to the central binary. This work demonstrates the importance of considering both gas and dust in studies of circumbinary discs and planets, and provides a potential means of explaining the orbital properties of circumbinary planets such as Kepler-34b, which have hitherto been difficult to explain using gas-only hydrodynamical simulations.
