Multi-physics simulations of ram-pressure stripping of disc galaxies

盘状星系冲压压力剥离的多物理场模拟

• 批准号: 184361340
• 负责人: Professor Dr. Marcus Brüggen, Ph.D.
• 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: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/184361340?language=en
• 关键词: Multi; physics; simulations; ram; pressure

Ram pressure stripping can remove significant amounts of gas from galaxies in clusters and massive groups, and thus has a large impact on the evolution of cluster galaxies. Recent observations have shown that key properties of ram-pressure stripped tails of galaxies, such as their width and structure, are in conflict with predictions by simulations of this process. Hence simulations of ram pressure stripping need to include physical processes that are likely to prove essential to capture the physics of the interaction between the galaxy and the intracluster medium. The most promising candidates are heating and cooling processes, magnetic fields and turbulence. These processes are related as a proper treatment of heating and cooling require a realistic temperature structure inside galaxies, and for this temperature structure turbulence and magnetic fields are important. Here, we propose to perform a suite of magnetohydrodynamical simulations that include a subgrid model for turbulence as well as heating and cooling terms. We will model the radiation from ram-pressure stripped tails and investigate whether these could be sites for star formation. This work is important to understand the dependence of galaxy evolution on environment and the cosmic cycle of matter.

冲压压力剥离可以从星系团和大质量星系团中去除大量的气体，从而对星系团的演化产生重大影响。最近的观测表明，星系的冲压压力剥离尾部的关键特性，如它们的宽度和结构，与模拟这一过程的预测相冲突。因此，冲压压力剥离的模拟需要包括物理过程，这可能被证明是必不可少的捕捉星系和星团内介质之间的相互作用的物理过程。最有希望的候选者是加热和冷却过程，磁场和湍流。这些过程是相关的，因为适当的加热和冷却处理需要星系内部的真实温度结构，而湍流和磁场对这种温度结构很重要。在这里，我们建议执行一套磁流体动力学模拟，包括亚网格模型的湍流以及加热和冷却条款。我们将模拟来自冲压压力剥离尾部的辐射，并研究这些是否可能是星星形成的场所。这项工作对于理解星系演化对环境和宇宙物质循环的依赖性具有重要意义。

项目成果

Turbulence in the Intracluster Medium

• DOI: 10.1007/978-3-662-44625-6_21
• 发表时间: 2015
• 作者: M. Brüggen;F. Vazza