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Filaments of the cosmic web drive spin acquisition of disc galaxies. The point process of filament-type saddle represent best this environment and can be used to revisit the Tidal Torque Theory in the context of an anisotropic peak (saddle)…

Astrophysics of Galaxies · Physics 2017-03-08 Christophe Pichon , Sandrine Codis , Dmitry Pogosyan , Yohan Dubois , Vincent Desjacques , Julien Devriendt

The large-scale structure of the universe is comprised of virialized blob-like clusters, linear filaments, sheet-like walls and huge near empty three-dimensional voids. Characterizing the large scale universe is essential to our…

Cosmology and Nongalactic Astrophysics · Physics 2024-06-06 Nithin Shivshankar , Pratyush Pranav , Vijay Natarajan , Rien van de Weygaert , E G Patrick Bos , Steven Rieder

We report the {\em first} systematic study of the supercluster-void network in the $\Lambda$CDM concordance cosmology treating voids and superclusters on an equal footing. We study the dark matter density field in real space smoothed with…

Astrophysics · Physics 2009-11-10 Sergei F. Shandarin

The cosmic web is one of the most complex systems in nature, consisting of galaxies and clusters of galaxies joined by filaments and walls, leaving large empty regions called cosmic voids. The most common method of describing the web is a…

Cosmology and Nongalactic Astrophysics · Physics 2025-09-05 Jaan Einasto

Cosmic voids are low-mass-density regions on intergalactic scales. They are where cosmic expansion and acceleration are most dominant, important places to understand and analyze for cosmology. This entry summarises theoretical underpinnings…

Cosmology and Nongalactic Astrophysics · Physics 2026-05-01 Yan-Chuan Cai , Mark Neyrinck

In the context of the cosmological and constrained ELUCID simulation, this study explores the statistical characteristics of filaments within the cosmic web, focussing on aspects such as the distribution of filament lengths and their radial…

Cosmology and Nongalactic Astrophysics · Physics 2024-08-21 Youcai Zhang , Hong Guo , Xiaohu Yang , Peng Wang

Clusters, filaments, sheets and voids are the building blocks of the cosmic web. In this study, we present and compare two distinct algorithms for finding cosmic filaments and sheets, a task which is far less well established than the…

Astrophysics of Galaxies · Physics 2009-11-13 Youcai Zhang , Xiaohu Yang , Andreas Faltenbacher , Volker Springel , Weipeng Lin , Huiyuan Wang

The expanding complex pattern of filaments, walls and voids build the evolving cosmic web with material flowing from underdense onto high density regions. Here we explore the dynamical behaviour of voids and galaxies in void shells relative…

Cosmology and Nongalactic Astrophysics · Physics 2017-05-19 Marcelo Lares , Haliana Luparello , Victoria Maldonado , Andrés N. Ruiz , Dante J. Paz , Laura Cecarelli , Diego Garcia Lambas

We seek to understand the relationship between galaxy properties and their local environment, which calls for a proper formulation of the notion of environment. We analyse the GIMIC suite of cosmological hydrodynamical simulations within…

Astrophysics of Galaxies · Physics 2015-06-19 Ofer Metuki , Noam I. Libeskind , Yehuda Hoffman , Robert A. Crain , Tom Theuns

Aims. Our goal is to find the relation between the two-point correlation functions (CFs) of projected and spatial density fields of galaxies in the context of the cosmic web. Methods. To investigate relations between spatial (3D) and…

Cosmology and Nongalactic Astrophysics · Physics 2021-09-01 J. Einasto , G. Hütsi , M. Einasto

In 1970 Zel'dovich published a far-reaching paper presenting a simple equation describing the nonlinear growth of primordial density inhomogeneities. The equation was remarkably successful in explaining the large scale structure in the…

Cosmology and Nongalactic Astrophysics · Physics 2016-11-15 Bernard J. T. Jones , Rien van de Weygaert

The nature and origin of turbulence and magnetic fields in the intergalactic space are important problems that are yet to be understood. We propose a scenario in which turbulent flow motions are induced via the cascade of the vorticity…

Astrophysics · Physics 2009-11-13 Dongsu Ryu , Hyesung Kang , Jungyeon Cho , Santabrata Das

Modern cosmology predicts that matter in our Universe has assembled today into a vast network of filamentary structures colloquially termed the Cosmic Web. Because this matter is either electromagnetically invisible (i.e., dark) or too…

It is possible to visualize the Cosmic Web as an interconnected network of one-dimensional filaments, two-dimensional sheets and three-dimensional volume-filling structures which we refer to as clusters. We have used the Local Dimension D,…

Cosmology and Nongalactic Astrophysics · Physics 2012-08-28 Prakash Sarkar , Biswajit Pandey , Somnath Bharadwaj

We present an information-theoretic analysis of the Cosmic Web that goes beyond the scalar density contrast and exploits the full structure of the tidal deformation tensor. The three eigenvalues ($\lambda_1, \lambda_2, \lambda_3$) of the…

Cosmology and Nongalactic Astrophysics · Physics 2026-05-26 Juan Garcia-Bellido

The universe is permeated by a network of filaments, sheets, and knots collectively forming a "cosmic web.'' The discovery of the cosmic web, especially through its signature of absorption of light from distant sources by neutral hydrogen…

Astrophysics · Physics 2009-11-13 C. -A. Faucher-Giguere , A. Lidz , L. Hernquist

We investigate the impact of the number of filaments connected to the nodes of the cosmic web on the physical properties of their galaxies using the Sloan Digital Sky Survey. We compare these measurements to the cosmological hydrodynamical…

The Universe is mostly composed of large and relatively empty domains known as cosmic voids, whereas its matter content is predominantly distributed along their boundaries. The remaining material inside them, either dark or luminous matter,…

Cosmology and Nongalactic Astrophysics · Physics 2016-09-02 Nico Hamaus , Alice Pisani , Paul M. Sutter , Guilhem Lavaux , Stéphanie Escoffier , Benjamin D. Wandelt , Jochen Weller

Voids are dominant features of the cosmic web. We revisit the cosmological information content of voids and connect void properties with the parameters of the background universe. We combine analytical results with a suite of large n-body…

Cosmology and Nongalactic Astrophysics · Physics 2025-03-24 Benjamin C. Bromley , Margaret J. Geller

Using a set of high-resolution simulations we study the statistical correlation of dark matter halo properties with the large-scale environment. We consider halo populations split into four Cosmic Web (CW) elements: voids, walls, filaments,…

Cosmology and Nongalactic Astrophysics · Physics 2021-03-24 Wojciech A. Hellwing , Marius Cautun , Rien van de Weygaert , Bernard T. Jones