The sticky geometry of the cosmic web

Johan Hidding 1 Rien van de Weygaert 1 Gert Vegter 2 Bernard Jones 1 Monique Teillaud 3
1 Kapteyn Astronomical Institute [Groningen]
2 JBI - Johann Bernoulli Institute for Mathematics and Computer Science
3 GEOMETRICA - Geometric computing
CRISAM - Inria Sophia Antipolis - Méditerranée , Inria Saclay - Ile de France
Abstract : In this video we highlight the application of Computational Geometry to our understanding of the formation and dynamics of the Cosmic Web. The emergence of this intricate and pervasive weblike structure of the Universe on Megaparsec scales can be approximated by a well-known equation from fluid mechanics, the Burgers' equation. The solution to this equation can be obtained from a geometrical formalism. We have extended and improved this method by invoking weighted Delaunay and Voronoi tessellations. The duality between these tessellations finds a remarkable and profound reflection in the description of physical systems in Eulerian and Lagrangian terms. The resulting Adhesion formalism provides deep insight into the dynamics and topology of the Cosmic Web. It uncovers a direct connection between the conditions in the very early Universe and the complex spatial patterns that emerged out of these under the influence of gravity.
Keywords : Delaunay Triangulation Voronoi Diagram Numeri- cal Methods Large Scale Structure of the Universe Cosmology
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Conference papers
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https://hal.inria.fr/hal-01101063
Contributor : Monique Teillaud <>
Submitted on : Wednesday, January 7, 2015 - 5:01:09 PM
Last modification on : Wednesday, October 30, 2019 - 7:36:17 PM

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Johan Hidding, Rien van de Weygaert, Gert Vegter, Bernard Jones, Monique Teillaud. The sticky geometry of the cosmic web. SoCG 2012 - 28th Annual Symposium on Computational Geometry, Jun 2012, Chapel Hill, United States. pp.421-422, ⟨10.1145/2261250.2261316⟩. ⟨hal-01101063⟩

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