The Formation and Evolution of resonant planetary Systems

共振行星系统的形成和演化

• 批准号: 361764675
• 负责人: Professor Dr. Cornelis Petrus Dullemond
• 金额: --
• 依托单位: Institut für Theoretische Astrophysik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/361764675?language=en
• 关键词: Formation; Evolution; resonant; planetary; Systems

As of today over 2600 exoplanetary systems that contain over 3500 planets have been discovered. This large sample of exoplanets provides us with the possibility to perform detailed statistical analyses of the orbital properties of the multi-planet systems that lie in the focus of this proposed research. Planets form in protoplanetary disks and gravitational interactions between the disk matter and the growing protoplanets will lead to a change and evolution of their orbital elements. Hence, it is the combined, coupled evolution of the disk and the embedded planets that determine the final dynamical outcome of planetary systems and the configurations that we can observe today. In case of differential radial migration of the planets a common outcome is the formation of resonant configurations, in which the orbital periods of the planets have an integer ratio. This is indeed observed for many systems and sometimes even more complex resonances involving three or even four planets are observed. However, the overall numbers of resonant systems is smaller than what might have been expected, and the period-ratio distribution of neighboring planets is rather smooth but displays peculiar enhancements just outside the nominal resonant locations. It is the goal of this proposal to understand the overall distribution of orbital elements of the whole sample of exoplanets as well as creating evolutionary histories of special individual systems with exciting orbital dynamics. To achieve this goal we plan to perform coupled hydrodynamical and N-body simulations that will be compared in detail with the available observational data sets and prepare for analyses of Gaia and PLATO data.

到目前为止，已经发现了2600多个系外行星系统，其中包含3500多颗行星。这一大样本的系外行星为我们提供了可能性，以执行详细的统计分析的轨道特性的多行星系统，在于在这个拟议的研究的重点。行星在原行星盘中形成，盘物质和生长的原行星之间的引力相互作用将导致其轨道要素的变化和演化。因此，正是盘和嵌入的行星的组合，耦合演化决定了行星系统的最终动力学结果和我们今天可以观察到的配置。如果行星发生差异径向迁移，常见的结果是形成共振配置，其中行星的轨道周期具有整数比。这在许多系统中确实可以观察到，有时甚至可以观察到涉及三个甚至四个行星的更复杂的共振。然而，共振系统的总数比预期的要少，而且邻近行星的周期比分布相当平滑，但在标称共振位置之外显示出特殊的增强。这一提议的目标是了解整个系外行星样本的轨道要素的总体分布，以及创建具有令人兴奋的轨道动力学的特殊单个系统的演化历史。为了实现这一目标，我们计划进行耦合流体动力学和N体模拟，将详细比较现有的观测数据集，并准备分析盖亚和PLATO数据。