The Dynamics of circumbinary Disks and embedded Planets

环双星盘和嵌入式行星的动力学

• 批准号: 285676328
• 负责人: Dr. Christoph Schäfer, since 3/2022
• 金额: --
• 依托单位: Abteilung Computational Physics
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/285676328?language=en
• 关键词: Dynamics; circumbinary; Disks; embedded; Planets

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.

大多数恒星都存在于双星星星系统中。在它们的形成过程中，一个足够近的星星系统仍然被一个环双星盘所包围，从这个盘中物质可以被吸积到双星系统上。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。这些空腔已被直接检测到在一些特殊的系统和高空间分辨率能力的阿尔马将允许调查更多的这些来源，甚至更详细。最近一个非常活跃的研究课题是这些盘中行星的形成和演化，这是受开普勒空间使命探测到的环双星行星的启发，在该项目的第一阶段研究了环双星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动力学模拟，研究恒星附近的流动、双星的质量和角动量的吸积、其轨道的变化、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，以分析和解释即将到来的盘和行星的新观测。