The Zeldovich & Adhesion approximations, and applications to the local universe

Abstract

The Zeldovich approximation (ZA) predicts the formation of a web of singularities. While these singularities may only exist in the most formal interpretation of the ZA, they provide a powerful tool for the analysis of initial conditions. We present a novel method to find the skeleton of the resulting cosmic web based on singularities in the primordial deformation tensor and its higher order derivatives. We show that the A_3-lines predict the formation of filaments in a two-dimensional model. We continue with applications of the adhesion model to visualise structures in the local (z < 0.03) universe.

arXiv comment9 pages, 8 figures, Proceedings of IAU Symposium 308 "The Zeldovich Universe: Genesis and Growth of the Cosmic Web", 23-28 June 2014, Tallinn, Estonia

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• ORIGAMI: Delineating Halos using Phase-Space Folds
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Cited by in corpus (8)

• Caustic Skeleton & Cosmic Web
• Persistent homology of the cosmic web. I: Hierarchical topology in $\Lambda$CDM cosmologies
• New method for initial density reconstruction
• Intergalactic filaments spin
• Bayesian cosmic density field inference from redshift space dark matter maps
• The cosmic spiderweb: equivalence of cosmic, architectural, and origami tessellations
• Cosmic Web & Caustic Skeleton: non-linear Constrained Realizations -- 2D case studies
• The Cosmic Spiderweb and General Origami Tessellation Design