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.

恒星中心区域的对流对恒星的演化非常重要，因为对流可以有效地混合中心核反应产生的化学元素。不稳定核心中产生的对流会穿透不稳定区域的边界，影响星星的结构，并增加核心中混合的质量。这就改变了星星的演化过程，从而影响了恒星系统的年龄估计，以及演化的后期阶段，直到超新星。我建议进行全面的三维数值模拟对流在恒星内部，并制定所谓的Alfredold的应力模型，以了解这种现象的一系列恒星的条件下，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