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Understanding the cosmic web

Published online by Cambridge University Press:  12 October 2016

Marius Cautun ,
Rien van de Weygaert ,
Bernard J. T. Jones  and
Carlos S. Frenk
Marius Cautun
Affiliation:
Department of Physics, Institute for Computational Cosmology, University of Durham, South Road, Durham DH1 3LE, UK, email: [email protected] Kapteyn Instituut, Rijksuniversiteit Groningen, P.O. Box 800, 9700 AV Groningen, The Netherlands
Rien van de Weygaert
Affiliation:
Kapteyn Instituut, Rijksuniversiteit Groningen, P.O. Box 800, 9700 AV Groningen, The Netherlands
Bernard J. T. Jones
Affiliation:
Kapteyn Instituut, Rijksuniversiteit Groningen, P.O. Box 800, 9700 AV Groningen, The Netherlands
Carlos S. Frenk
Affiliation:
Department of Physics, Institute for Computational Cosmology, University of Durham, South Road, Durham DH1 3LE, UK, email: [email protected]
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Abstract

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We investigate the characteristics and the time evolution of the cosmic web from redshift, z=2, to present time, within the framework of the \nexus{} algorithm. This necessitates the introduction of new analysis tools optimally suited to describe the very intricate and hierarchical pattern that is the cosmic web. In particular, we characterising filaments (walls) in terms of their linear (surface) mass density, which is very good in capturing the evolution of these structures. At early times the cosmos is dominated by tenuous filaments and sheets, which, during subsequent evolution, merge together, such that the present day web is dominated by fewer, but much more massive, structures. We show also that voids are more naturally described in terms of their boundaries and not their centres. We illustrate this for void density profiles, which, when expressed as a function of the distance from void boundary, show a universal profile in good qualitative agreement with the theoretical shell-crossing framework of expanding underdense regions.

Keywords

large-scale structure of universedark matter
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. 47 - 56
Copyright
Copyright © International Astronomical Union 2016 

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