Understanding spiral structure

了解螺旋结构

• 批准号: 2285836
• 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: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2285836
• 关键词: Understanding; spiral; structure

This project falls within STFC roadmap topic A5 (How do stars and galaxies evolve?). The aim is to understand the nature of spiral structure in disc galaxies, by studying how models of axisymmetric discs response to internal and external perturbations and comparing the results against observational data, particularly from Gaia DR2 and subsequent releases.This is a lively current topic of research within the galaxy dynamics community. It is most commonly tackled using N-body simulations or, less frequently, by using some kind of analysis of the modes of the system. Instead of finding eigenmodes, simpler, underexplored alternative approach is to consider the initial value problem for the coupled Vlasov and Poisson equations that describe the evolution of the disc. We will first focus on the evolution of idealised 2d discs before exploring avenues for including the disc's vertical structure.

该项目属于 STFC 路线图主题 A5（恒星和星系如何演化？）。目的是通过研究轴对称盘模型如何响应内部和外部扰动并将结果与​​观测数据（特别是来自 Gaia DR2 和后续版本的数据）进行比较，了解盘状星系中螺旋结构的本质。这是星系动力学界当前的一个热门研究主题。最常见的是使用 N 体模拟来解决，或者较少使用系统模式的某种分析来解决。不是寻找本征模，更简单、尚未充分探索的替代方法是考虑描述圆盘演化的耦合 Vlasov 和 Poisson 方程的初始值问题。在探索包含光盘垂直结构的途径之前，我们将首先关注理想化二维光盘的演变。