Circum-planetary accretion disks

环绕行星吸积盘

• 批准号: 29735732
• 负责人: Professor Dr. Wilhelm Kley (†)
• 金额: --
• 依托单位: Max-Planck-Institut für Astronomie (MPIA)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/29735732?language=en
• 关键词: Circum; planetary; accretion; disks

During the early stages of the planet formation process very young protoplanets are still embedded in the circum-stellar disk from which they formed. Numerical hydrodynamic simulations of disk-planet interaction have shown that the mass accumulated by the protoplanet first circulates around it, and is then accreted via a circum-planetary sub-disk in almost Keplerian rotation.In order to further understand the accretion process onto the protoplanet, high resolution numerical simulations of the circum-planetary accretion disk are essential. We propose to perform for the first time detailed multi-dimensional hydrodynamic simulations of these circum-planetary sub-disks to determine their structure and evolution. From the calculations we will gain important information about the growth rate of protoplanetary cores, their angular momentum evolution and, thus, the time scale of planet formation.Circum-planetary disks may reach comparatively high temperatures, but are located within the surrounding cooler circum-stellar disk. From our detailed investigation of the circum-planetary disk parameter space we expect also interesting insight concerning observational properties of planetary systems in their early formation phase.

在行星形成过程的早期阶段，非常年轻的原行星仍然嵌在它们形成的环星盘中。对盘-行星相互作用的流体动力学数值模拟表明，原行星积累的质量首先围绕它循环，然后通过一个近似开普勒旋转的环行中子盘吸积到原行星上，为了进一步了解吸积到原行星上的过程，对环行吸积盘进行高分辨率的数值模拟是必要的。我们建议第一次进行详细的多维流体动力学模拟这些环行星子磁盘，以确定其结构和演变。通过计算，我们将获得有关原行星核的生长速率、角动量演化以及行星形成时间尺度的重要信息。行星盘可能达到相对较高的温度，但位于周围较冷的恒星盘内。通过我们对绕行星盘参数空间的详细研究，我们预计还会对行星系统早期形成阶段的观测特性有有趣的见解。