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arXiv 1105.4869astro-ph.CO
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超星系团和空洞中暗晕的质量函数

The Mass Function of Dark Halos in Superclusters and Voids

E. P. Kurbatov

摘要:

本文对Press-Schechter理论进行了修正,考虑了背景大尺度结构(LSS)--超星系团或空洞的存在。LSS被视为随机密度场的线性泛函形式的统计约束。在LSS内的背景密度的偏差被解释在伪宇宙学意义上。使用的约束形式主义,可以帮助我们探测非平凡的空间统计晕,例如边缘和形状的超星系团和空洞的边界上的影响。参数的约束连接到LSS的功能:它的平均密度,空间尺度和形状,空间动量的高阶。结果表明,存在的非维里化的LSS可以导致一个可观察到的偏差的质量函数。利用这种效应建立一个程序来恢复参数的观测估计的质量函数的背景扰动。

英文摘要:

A modification of the Press-Schechter theory allowing for presence of a background large-scale structure (LSS) - a supercluster or a void, is proposed. The LSS is accounted as the statistical constraints in form of linear functionals of the random overdensity field. The deviation of the background density within the LSS is interpreted in a pseudo-cosmological sense. Using the constraints formalism may help us to probe non-trivial spatial statistics of haloes, e.g. edge and shape effects on boundaries of the superclusters and voids. Parameters of the constraints are connected to features of the LSS: its mean overdensity, a spatial scale and a shape, and spatial momenta of higher orders. It is shown that presence of a non-virialized LSS can lead to an observable deviation of the mass function. This effect is exploited to build a procedure to recover parameters of the background perturbation from the observationally estimated mass function.

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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