The response of stellar discs to perturbations

恒星盘对扰动的响应

• 批准号: 2888230
• 金额: --
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2888230
• 关键词: response; stellar; discs; perturbations

The aim of this project is to understand the dynamics of stellar discs -- including that of our own Galaxy -- using dynamical modelling applied to data from Gaia and similar surveys.The starting point for understanding the dynamical structure of self-gravitating stellar discs is usually the construction of an axisymmetrized equilibrium model. Real stellar discs are never axisymmetric though and so the next step is to apply the methods of perturbation theory to calculate both the qualitative and quantitative response of such models to the various types of noise experienced by real discs. Most investigations to date have focused on the frequency-dependent response of the disc, but this project adopts an explicitly time-dependent approach, which also makes comparison with N-body models more straightforward. We have recently built machinery for modelling the non-resonant dynamics of 2d discs and the objectives of the project are to extend this to handle orbital resonances and to vertical structure.

该项目的目的是使用应用于GAIA和类似调查的数据的动态建模来了解恒星光盘的动态 - 包括我们自己的星系。通常是轴对称平衡模型的构建。不过，真正的恒星盘绝不是轴对称性的，因此下一步是应用扰动理论的方法来计算此类模型对真实光盘所经历的各种噪声的定性和定量响应。迄今为止，大多数调查都集中在光盘的频率响应上，但是该项目采用了明确的时间依赖性方法，这也使与N体模型的比较更加直接。我们最近建立了用于建模2D光盘的非共振动力学的机械，并且该项目的目标是将其扩展以处理轨道共振和垂直结构。