Multidimensional Simulations of Core Convection

IF 3.2 Q2 ASTRONOMY & ASTROPHYSICS
Galaxies Pub Date : 2023-07-28 DOI:10.3390/galaxies11040089
D. Lecoanet, P. Edelmann
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引用次数: 1

Abstract

The cores of main sequence intermediate- and high-mass stars are convective. Mixing at the radiative–convective boundary, waves excited by the convection, and magnetic fields generated by convective dynamos all influence the main sequence and post-main sequence evolution of these stars. These effects must be understood to accurately model the structure and evolution of intermediate- and high-mass stars. Unfortunately, there are many challenges in simulating core convection due to the wide range of temporal and spatial scales, as well as many important physics effects. In this review, we describe the latest numerical strategies to address these challenges. We then describe the latest state-of-the-art simulations of core convection, summarizing their main findings. These simulations have led to important insights into many of the processes associated with core convection. Two outstanding problems with multidimensional simulations are, 1. it is not always straightforward to extrapolate from simulation parameters to the parameters of real stars; and 2. simulations using different methods sometimes appear to arrive at contradictory results. To address these issues, next generation simulations of core convection must address how their results depend on stellar luminosity, dimensionality, and turbulence intensity. Furthermore, code comparison projects will be essential to establish robust parameterizations that will become the new standard in stellar modeling.
核心对流的多维模拟
主序星中质量恒星和高质量恒星的核心是对流的。辐射-对流边界的混合、对流激发的波以及对流发电机产生的磁场都会影响这些恒星的主序星和主序星后的演化。必须理解这些影响才能准确地模拟中质量和高质量恒星的结构和演化。不幸的是,由于时间和空间尺度的广泛性,以及许多重要的物理效应,在模拟核心对流方面存在许多挑战。在这篇综述中,我们介绍了应对这些挑战的最新数字策略。然后,我们描述了最新的核心对流模拟技术,总结了他们的主要发现。这些模拟为许多与核心对流相关的过程带来了重要的见解。多维模拟的两个突出问题是:1。从模拟参数外推到真实恒星的参数并不总是简单的;和2。使用不同方法的模拟有时会得出相互矛盾的结果。为了解决这些问题,下一代核心对流模拟必须解决其结果如何取决于恒星光度、维度和湍流强度。此外,代码比较项目对于建立稳健的参数化至关重要,这将成为恒星建模的新标准。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Galaxies
Galaxies Physics and Astronomy-Astronomy and Astrophysics
CiteScore
4.90
自引率
12.00%
发文量
100
审稿时长
11 weeks
期刊介绍: Es una revista internacional de acceso abierto revisada por pares que proporciona un foro avanzado para estudios relacionados con astronomía, astrofísica y cosmología. Areas temáticas Astronomía Astrofísica Cosmología Astronomía observacional: radio, infrarrojo, óptico, rayos X, neutrino, etc. Ciencia planetaria Equipos y tecnologías de astronomía. Ingeniería Aeroespacial Análisis de datos astronómicos. Astroquímica y Astrobiología. Arqueoastronomía Historia de la astronomía y cosmología. Problemas filosóficos en cosmología.
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