现代宇宙学中的数值模拟技术和应用
发布时间：2019-04-30 21:11
【摘要】：宇宙尺度上物理过程的多样性和高度非线性使数值模拟成为现代宇宙学必不可少的研究手段,它不仅可以细致追踪宇宙结构的形成和演化历史,同时也为观测和理论模型的检验建立了一个桥梁.本文将总结计算宇宙学领域技术方法的最新发展,包括无碰撞粒子N体数值模拟技术,引入重子物理的计算流体方法.在此基础上,我们将针对现代宇宙学的核心科学问题,简要综述数值模拟技术在面向下一代巡天观测,尤其是暗物质和暗能量探测方面的实际应用.此外,我们选择性地讨论了数值模拟在第一代恒星和反馈作用、宇宙中的气体吸积和恒星形成,以及高红移星系盘的形成研究中所发挥的作用.因应下一代大规模巡天的开展和超级计算技术的快速进步,我们也展望了在未来十年计算宇宙学和相关科学可能取得的进展及发展趋势.
[Abstract]:The diversity and high nonlinearity of physical processes on the cosmic scale make numerical simulation an indispensable research tool in modern cosmology. It can not only trace the history of the formation and evolution of the cosmic structure in detail. At the same time, it also establishes a bridge for observation and theoretical model test. This paper summarizes the latest development of computational cosmology techniques, including non-collision particle N-volume numerical simulation, and introduces the computational fluid method of baryon physics. On this basis, we will briefly review the practical application of numerical simulation technology to the next generation of sky survey observations, especially the detection of dark matter and dark energy, aiming at the core scientific problems of modern cosmology. In addition, we selectively discuss the role of numerical simulation in the study of the first generation of stars and feedback, gas accretion and star formation in the universe, and the formation of Gao Hong's plate. In response to the development of the next generation of large-scale sky surveys and the rapid progress of supercomputing technology, we also look forward to the possible progress and development trend of computational cosmology and related sciences in the next decade.
【作者单位】： 中国科学院紫金山天文台;南京大学天文与空间科学学院;教育部现代天文与天体物理重点实验室;
【基金】：国家自然科学基金(批准号:11273060,91230115)
【分类号】：P159
[Abstract]:The diversity and high nonlinearity of physical processes on the cosmic scale make numerical simulation an indispensable research tool in modern cosmology. It can not only trace the history of the formation and evolution of the cosmic structure in detail. At the same time, it also establishes a bridge for observation and theoretical model test. This paper summarizes the latest development of computational cosmology techniques, including non-collision particle N-volume numerical simulation, and introduces the computational fluid method of baryon physics. On this basis, we will briefly review the practical application of numerical simulation technology to the next generation of sky survey observations, especially the detection of dark matter and dark energy, aiming at the core scientific problems of modern cosmology. In addition, we selectively discuss the role of numerical simulation in the study of the first generation of stars and feedback, gas accretion and star formation in the universe, and the formation of Gao Hong's plate. In response to the development of the next generation of large-scale sky surveys and the rapid progress of supercomputing technology, we also look forward to the possible progress and development trend of computational cosmology and related sciences in the next decade.
【作者单位】： 中国科学院紫金山天文台;南京大学天文与空间科学学院;教育部现代天文与天体物理重点实验室;
【基金】：国家自然科学基金(批准号:11273060,91230115)
【分类号】：P159
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