The Dynamics of circumbinary Disks and embedded Planets

大多数恒星都存在于双星系统中。在它们的形成过程中，一个足够接近的双星系统仍然被一个外接双星盘所包围，从这个圆盘中可以将物质吸积到双星上。双星的轨道运动将角动量传递给圆盘，并形成一个中心内腔。这些空洞已经在一些特殊系统中被直接探测到，ALMA的高空间分辨率能力将使我们能够更详细地调查更多这样的源。最近一个非常活跃的研究课题是这些圆盘中行星的形成和演化，灵感来自开普勒太空任务探测到的外双星。在该项目的第一阶段，已经研究了外双星圆盘和嵌入行星的基本结构和动力学。在这里，我们计划进行新的流体力学模拟，研究恒星附近的流动，质量和角动量对双星的吸积，双星轨道的变化，圆盘的三维结构和小粒子的空间分布。我们将与观测者密切合作，以分析和解释即将进行的对圆盘和行星的新观测。

The majority of stars reside in binary star systems. During their formation a sufficiently close binary star system is still surrounded by a circumbinary disc from which material can be accreted onto the binary. The orbital motion of the binary transfers angular momentum to the disc and a central inner cavity forms. These cavities have been directly detected in some special systems and the high spatial resolution capabilities of ALMA will allow to investigate more of these sources in even higher detail. A very active recent research topic is the formation and evolution of planets in these discs inspired by the circumbinary planets detected by the Kepler space mission.The fundamental structure and dynamics of circumbinary discs and embedded planets has been studied in the first phase of the project. Here, we plan to perform new hydrodynamical simulations and study the flow in the vicinity of stars, the accretion of mass and angular momentum to the binary, the change of its orbit, the three-dimensional structure of the disc and the spatial distribution of small particles. We will collaborate closely with observers in order to analyse and interpret upcoming new observations of discs and planets.