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The cosmic web in CosmoGrid void regions

Published online by Cambridge University Press:  12 October 2016

Steven Rieder ,
Rien van de Weygaert ,
Marius Cautun ,
Burcu Beygu  and
Simon Portegies Zwart
Steven Rieder
Affiliation:
Kapteyn Instituut, Rijksuniversiteit Groningen, P.O. Box 800, 9700 AV Groningen, The Netherlands, email: steven@stevenrieder.nl Sterrewacht Leiden, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands
Rien van de Weygaert
Affiliation:
Kapteyn Instituut, Rijksuniversiteit Groningen, P.O. Box 800, 9700 AV Groningen, The Netherlands, email: steven@stevenrieder.nl
Marius Cautun
Affiliation:
Kapteyn Instituut, Rijksuniversiteit Groningen, P.O. Box 800, 9700 AV Groningen, The Netherlands, email: steven@stevenrieder.nl Department of Physics, Institute for Computational Cosmology, University of Durham, South Road, Durham DH1 3LE, UK
Burcu Beygu
Affiliation:
Kapteyn Instituut, Rijksuniversiteit Groningen, P.O. Box 800, 9700 AV Groningen, The Netherlands, email: steven@stevenrieder.nl
Simon Portegies Zwart
Affiliation:
Sterrewacht Leiden, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands
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Abstract

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We study the formation and evolution of the cosmic web, using the high-resolution CosmoGrid ΛCDM simulation. In particular, we investigate the evolution of the large-scale structure around void halo groups, and compare this to observations of the VGS-31 galaxy group, which consists of three interacting galaxies inside a large void.

The structure around such haloes shows a great deal of tenuous structure, with most of such systems being embedded in intra-void filaments and walls. We use the Nexus+} algorithm to detect walls and filaments in CosmoGrid, and find them to be present and detectable at every scale. The void regions embed tenuous walls, which in turn embed tenuous filaments. We hypothesize that the void galaxy group of VGS-31 formed in such an environment.

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. 575 - 579
Copyright
Copyright © International Astronomical Union 2016 

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