论文标题
Kozai-Lidov气盘中的偏心灰尘环形成
Eccentric dust ring formation in Kozai-Lidov gas disks
论文作者
论文摘要
在二元星系的一个组件附近的一个高度未对准的气盘可以进行全球Kozai-Lidov（KL）振荡，并换成磁盘倾斜度和偏心率。通过对气体和灰尘盘的流体动力学模拟，我们探讨了这些振荡对粉尘密度分布的影响。对于与气体略有耦合的灰尘（$ {\ rm st} \大约1 $），我们发现灰尘经历了与气盘相似的动力学行为，但是灰尘的径向分布可能与气体大不相同。在偏心磁盘中，灰尘的向内径向漂移更快，导致外灰尘半径较小。在高度偏心的磁盘阶段，灰尘分为多个狭窄的偏心环。偏心的灰尘环形成可能对未对准磁盘中行星的形成具有重要意义。我们建议在中间半径上具有足够强的偏心峰的气盘内通常会发生多个灰尘环。
A highly misaligned gas disk around one component of a binary star system can undergo global Kozai-Lidov (KL) oscillations for which the disk inclination and eccentricity are exchanged. With hydrodynamical simulations of a gas and dust disk we explore the effects of these oscillations on the dust density distribution. For dust that is marginally coupled to the gas (${\rm St} \approx 1$), we find that the dust undergoes similar dynamical behaviour to the gas disk but the radial distribution of dust may be very different to the gas. The inward radial drift of the dust is faster in an eccentric disk leading to a smaller outer dust disk radius. The dust breaks into multiple narrow eccentric rings during the highly eccentric disk phase. Eccentric dust ring formation may have significant implications for the formation of planets in misaligned disks. We suggest that multiple dust rings may generally occur within gas disks that have sufficiently strong eccentricity peaks at intermediate radii.
