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arXiv 1810.04263astro-ph.CO
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银河系调查分析的最新发展

Recent Developments in the Analysis of Galaxy Surveys

Will J. Percival

摘要:

这些是高级课堂讲稿,涵盖了用于分析星系巡天的方法学的最新发展。重点是特别是直接测量的星系功率谱,虽然我也讨论了它的傅立叶变换,比较的关联函数。这些2点统计,假设过密度场在大尺度上具有高斯统计,包含了大部分可从星系分布中获得的宇宙学信号。多极测量的最新发展,处理系统学,卷积理论模型与调查窗口函数,协方差矩阵的近似,和加权计划测量红移的演变。重点是对所涉问题的分析解释,而不是最近的分析或模拟结果。

英文摘要:

These are advanced lecture notes covering recent developments in the methodology used to analyse galaxy surveys. The focus is particularly on direct measurements of the galaxy power spectrum although I also discuss its Fourier transform, the correlation function for comparison. These 2-point statistics, under the assumption that the overdensity field has Gaussian statistics on large-scales, contain the majority of the cosmological signal available from the galaxy distribution. Recent developments in multipole measurements, dealing with systematics, convolving theoretical models with the survey window function, the approximation of covariance matrices, and weighting schemes for measuring evolution with redshift are considered. The focus is on analytic explanation of the issues involved rather than on recent analyses or simulation results.

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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