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arXiv 2009.00977astro-ph.CO
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空洞网络中的标度关系:对局域宇宙动力学的影响和空间度规的推断

Scaling Relations in the Network of Voids: Implications for Local Universe Dynamics and Inferring the Metric of Space

M. A. Aragon-Calvo

摘要:

宇宙中物质的大规模分布形成了一个由团簇、细丝和包围着大空洞的墙组成的网络。空隙又可以被描述为蜂窝系统,其中空隙/单元限定动态不同的区域。已经观察到由各种物理和生物过程产生的细胞系统密切遵循与其几何形状、拓扑结构和动力学相关的标度律。宇宙学空洞是已知的最大的细胞系统,这些标度律从未被研究过。使用宇宙学的N体模拟,我们提出了一个网络的空隙的标度关系的研究,扩展其有效性超过30个数量级的规模相对于其他已知的细胞系统。标度关系使我们能够从空洞的几何形状和拓扑结构中间接测量空洞的动力学状态。利用我们的结果,我们将狮子座支线上观察到的“局部速度异常”解释为我们宇宙后院塌陷空洞的结果。此外,空洞的几何形状和连通性直接取决于空间的曲率。在这里,我们提出了一个独立的和新颖的度量空间的尺度关系,并讨论其在未来的星系调查的使用。

英文摘要:

The large-scale distribution of matter in the universe forms a network of clusters, filaments and walls enclosing large empty voids. Voids in turn can be described as a cellular system in which voids/cells define dynamically distinct regions. Cellular systems arising from a variety of physical and biological processes have been observed to closely follow scaling laws relating their geometry, topology and dynamics. These scaling laws have never been studied for cosmological voids, the largest known cellular system. Using a cosmological N-body simulation we present a study of the scaling relations of the network of voids, extending their validity by over 30 orders of magnitude in scale with respect to other known cellular systems. Scaling relations allow us to make indirect measurements of the dynamical state of voids from their geometry and topology. Using our results we interpret the "local velocity anomaly" observed in the Leo Spur as the result of a collapsing void in our cosmic backyard. Moreover, the geometry and connectivity of voids directly depends on the curvature of space. Here we propose scaling relations as an independent and novel measure of the metric of space and discuss their use in future galaxy surveys.

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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