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The structural elements of the cosmic web

Published online by Cambridge University Press:  12 October 2016

Bernard J.T. Jones  and
Rien van de Weygaert
Bernard J.T. Jones
Affiliation:
Kapteyn Astronomical Institute, University of Groningen, The Netherlands email: jones@astro.rug.nl
Rien van de Weygaert
Affiliation:
Kapteyn Astronomical Institute, University of Groningen, The Netherlands email: weygaert@astro.rug.nl
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Abstract

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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 Universe that we observe: a Universe in which the structure appears to be delineated by filaments and clusters of galaxies surrounding huge void regions. In order to concretise this impression it is necessary to define these structural elements through formal techniques with which we can compare the Zel'dovich model and N-body simulations with the observational data.

We present an overview of recent efforts to identify voids, filaments and clusters in both the observed galaxy distribution and in numerical simulations of structure formation. We focus, in particular, on methods that involve no fine-tuning of parameters and that handle scale dependence automatically. It is important that these techniques should result in finding structures that relate directly to the dynamical mechanism of structure formation.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S308: The Zeldovich Universe: Genesis and Growth of the Cosmic Web , June 2014 , pp. 219 - 235
Copyright
Copyright © International Astronomical Union 2016 

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