Convective overshooting from stellar cores: 3D simulation and Reynold's stress models

恒星核心的对流超调：3D 模拟和雷诺应力模型

• 批准号: PP/D002214/1
• 负责人: Ian Roxburgh
• 金额: $ 0.86万
• 依托单位: Queen Mary University of London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2006
• 资助国家: 英国
• 起止时间: 2006 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=PP%2FD002214%2F1
• 关键词: Convective; overshooting; stellar; cores; 3D

Convection in the central regions of stars is very important in determining how stars evolve since convection is very efficient at mixing the chemical elements produced by nuclear reactions in the centre Convection generated in an unstable core will penetrate beyond the boundary of the unstable region affecting both the structure of the star and enlarging the mass that is mixed in the core. This changes the evolution of the star, with consequences for estimating the age of stellar systems, and the late stages of evolution up to supernovae. I propose to undertake full 3-dimensional numerical simulations of convection in stellar interiors and also to develop so called Reynold's stress models to understand this phenomenon for a range of stellar conditions, including rotation and magnetic fields.

恒星中央区域中的对流对于确定恒星如何发展非常重要，因为对流在混合不稳定核心产生的中心对流中产生的化学元件非常有效，将渗透到影响恒星结构的不稳定区域的边界之外，从而使恒星的结构和增大的质量混合在核心中。这改变了恒星的演变，对估计恒星系统的年龄以及超新星的进化后期产生了后果。我建议在恒星内部进行对流的完整三维数值模拟，并开发所谓的雷诺的应力模型，以了解一系列恒星条件，包括旋转和磁场。

项目成果

Convection in astrophysics

• 发表时间: 2007
• 作者: F. Kupka;I. Roxburgh;K. Chan

Reynolds stress models of convection in convective cores

• DOI: 10.1017/s1743921307000166
• 发表时间: 2006-08
• 期刊: Proceedings of the International Astronomical Union
• 作者: I. Roxburgh;F. Kupka

Mixing length model of convection in stellar cores

恒星核心对流的混合长度模型

• DOI: 10.1017/s1743921307000233
• 发表时间: 2006
• 期刊: Proceedings of the International Astronomical Union
• 作者: Roxburgh I