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arXiv 1405.4976stat.ME
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星系形成:可观测宇宙的贝叶斯历史匹配

Galaxy Formation: Bayesian History Matching for the Observable Universe

Ian Vernon, Michael Goldstein, Richard Bower

摘要:

达勒姆大学计算宇宙学研究所的宇宙学家开发了一种称为Galform的星系形成模型,旨在帮助我们了解暗物质存在下星系的形成,生长和随后的演化。Galform需要指定许多输入参数,并且需要大量时间来完成一次模拟,这使得模型的输出与宇宙的真实观测之间的比较极具挑战性。本文涉及这个问题的分析,使用贝叶斯仿真内的迭代历史匹配策略,并表示最详细的不确定性分析的星系形成模拟尚未执行。

英文摘要:

Cosmologists at the Institute of Computational Cosmology, Durham University, have developed a state of the art model of galaxy formation known as Galform, intended to contribute to our understanding of the formation, growth and subsequent evolution of galaxies in the presence of dark matter. Galform requires the specification of many input parameters and takes a significant time to complete one simulation, making comparison between the model's output and real observations of the Universe extremely challenging. This paper concerns the analysis of this problem using Bayesian emulation within an iterative history matching strategy, and represents the most detailed uncertainty analysis of a galaxy formation simulation yet performed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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