Formation of planetesimals via the streaming instability - numerical simulations -

通过流动不稳定性形成星子 - 数值模拟 -

• 批准号: 429525649
• 负责人: Professor Dr. Robi Stefan Banerjee
• 金额: --
• 依托单位: Hamburger Sternwarte
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/429525649?language=en
• 关键词: Formation; planetesimals; via; streaming; instability

The streaming instability is a mechanism to overcome the barriers impeding the growth of solid particles to planetesimals in laminarflows. It is thus a viable mechanism to close a gap in the theory of planet formation. Via the streaming instability, particles can beconcentrated in dense filaments, in which gravitationally unstable particle clumps form planetesimals. Currently, the PhD student UrsSch\"afer at the Hamburg Observatory is performing numerical simulations to investigate the efficiency of the streaming instability to form planetesimals for various disc properties. This is done with a novel numerical approach including the gravitational potential of thecentral star in global simulations with the FLASH code.

流不稳定性是克服层流中固体颗粒向星子生长障碍的一种机制。因此，这是一种可行的机制，可以填补行星形成理论的空白。通过流的不稳定性，粒子可以被集中在密集的细丝中，其中重力不稳定的粒子团块形成星子。目前，汉堡天文台的博士研究生UrsSch\ \ ' afer正在进行数值模拟，以研究流不稳定性形成各种圆盘性质的星子的效率。这是通过一种新颖的数值方法完成的，其中包括使用FLASH代码进行全局模拟的中心恒星的引力势。