标题： 宇宙网动力学：力和应变 显示英文标题

标题： Cosmic Web Dynamics: Forces and Strains

摘要： 本研究涉及在兆秒差距尺度上由丝状结构、墙状结构、星系团节点和空洞引起的引力场和潮汐场的清单，以及它们如何聚集并塑造宇宙网。 该研究基于一个N$_{\rm Part}=512^3$ $\Lambda$ CDM仅暗物质N体模拟，在(300$h^{-1}$~Mpc)$^3$的盒子中，位于$z=0$。 我们采用密度场NEXUS+多尺度形态学方法，为每个位置分配适当的形态特征。 然后确定宇宙网各组成部分对局部引力和潮汐力的贡献。 我们发现，丝状结构是丝状结构内部、大多数稀疏空洞区域以及所有墙状结构区域中占主导地位的动力学成分。 星系团节点的引力影响是有限的，它们仅在其附近区域占主导地位。 空洞引起的力场以发散的流出模式为特点，给人的印象是分段体积，其中空洞将物质推向其边界。 空洞在潮汐场中表现得非常显著，形成一个与多尺度宇宙网紧密相关的细胞状织物。 然而，即使在空洞内部，周围丝状结构的动力学影响也比空洞的向外推力更强。 因此，空洞的动力学不能不考虑环境的影响来理解。 我们得出结论，丝状结构构成了宇宙网的压倒性引力因素，而空洞则负责宇宙网的空间组织，因此也负责其空间连通性。 显示英文摘要

摘要： This study concerns an inventory of the gravitational force and tidal field induced by filaments, walls, cluster nodes and voids on Megaparsec scales and how they assemble and shape the Cosmic Web. The study is based on a N$_{\rm Part}=512^3$ $\Lambda$CDM dark matter only N-body simulation in a (300$h^{-1}$~Mpc)$^3$ box at $z=0$. We invoke the density field NEXUS+ multiscale morphological procedure to assign the appropriate morphological feature to each location. We then determine the contribution by each of the cosmic web components to the local gravitational and tidal forces. We find that filaments are, by far, the dominant dynamical component in the interior of filaments, in the majority of underdense void regions and in all wall regions. The gravitational influence of cluster nodes is limited, and they are only dominant in their immediate vicinity. The force field induced by voids is marked by divergent outflowing patterns, yielding the impression of a segmented volume in which voids push matter towards their boundaries. Voids manifest themselves strongly in the tidal field as a cellular tapestry that is closely linked to the multiscale cosmic web. However, even within the interior of voids, the dynamical influence of the surrounding filaments is stronger than the outward push by voids. Therefore, the dynamics of voids cannot be understood without taking into account the influence of the environment. We conclude that filaments constitute the overpowering gravitational agent of the cosmic web, while voids are responsible for the cosmic web's spatial organisation and hence of its spatial connectivity.