Most massive haloes with Gumbel statistics
Most massive haloes with Gumbel statistics
复制标题
最大质量光环的甘贝尔统计
DOI：
--
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
C. Pichon
中科院分区：
文献类型：
--
作者：
Olaf Davis;J. Devriendt;S. Colombi;J. Silk;C. Pichon
我们提出了一个分析计算的极端值统计暗物质晕-也就是说，最大质量的晕在宇宙的某些区域内的特定形状和大小的概率分布。我们的计算利用了相关函数的细胞计数形式主义，以及来自Sheth-Tormen质量函数的晕偏置。我们证明了权力的方法对球形区域，比较结果的测量在一个大的宇宙学暗物质模拟和实现良好的协议。特别好的拟合得到的最大质量的最可能的值和高质量的分布，相关的约束宇宙学的观测最大质量的集群。
We present an analytical calculation of the extreme value statistics for dark matter halos - that is, the probability distribution of the most massive halo within some region of the universe of specified shape and size. Our calculation makes use of the counts-in-cells formalism for the correlation functions, and the halo bias derived from the Sheth-Tormen mass function. We demonstrate the power of the method on spherical regions, comparing the results to measurements in a large cosmological dark matter simulation and achieving good agreement. Particularly good fits are obtained for the most likely value of the maximum mass and for the high-mass tail of the distribution, relevant in constraining cosmologies by observations of most massive clusters.