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arXiv 0911.3779astro-ph.COastro-ph.GA
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骨架:连接大尺度结构与星系形成

The Skeleton: Connecting Large Scale Structures to Galaxy Formation

Christophe Pichon, Christophe Gay, Dmitry Pogosyan, Simon Prunet, Thierry Sousbie, Stephane Colombi, Adrianne Slyz, Julien Devriendt

摘要:

我们报告的两个定量,形态估计的宇宙网络,所谓的全球和当地的骨架结构。第一,基于全球的物质密度梯度流的研究,使我们能够研究密度峰值和它的周围环境之间的连通性,通过冷流星系晕的各向异性吸积直接相关。从第二个,基于涉及场的导数的局部约束方程,我们可以推导出对强大统计的预测,例如作为密度阈值的函数的宇宙网络的微分长度和相对鞍到极值计数(应用于结构和连通性的渗透),以及一个理论框架来研究它们的宇宙演化通过重力引起的非线性的发病。

英文摘要:

We report on two quantitative, morphological estimators of the filamentary structure of the Cosmic Web, the so-called global and local skeletons. The first, based on a global study of the matter density gradient flow, allows us to study the connectivity between a density peak and its surroundings, with direct relevance to the anisotropic accretion via cold flows on galactic halos. From the second, based on a local constraint equation involving the derivatives of the field, we can derive predictions for powerful statistics, such as the differential length and the relative saddle to extrema counts of the Cosmic web as a function of density threshold (with application to percolation of structures and connectivity), as well as a theoretical framework to study their cosmic evolution through the onset of gravity-induced non-linearities.

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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