Journal
ASTRONOMY & ASTROPHYSICS
Volume 531, Issue -, Pages -Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201016070
Keywords
large-scale structure of Universe; early Universe; cosmology: theory
Categories
Funding
- Estonian Science Foundation [7146, 8005]
- Estonian Ministry for Education and Science [SF0060067s08]
- ICRAnet
- University of Valencia (Vicerrectorado de Investigacion)
- Spanish MEC [AYA2006-14056, CSD2007-00060]
- DFG [Mu 1020/15-1]
- Russian Foundation for Basic Research [11-02-00643]
- Russian Academy of Sciences
- Alfred P. Sloan Foundation
- National Science Foundation
- US Department of Energy
- National Aeronautics and Space Administration
- Japanese Monbukagakusho
- Max Planck Society
- Higher Education Funding Council for England
- American Museum of Natural History
- Astrophysical Institute Potsdam
- University of Basel
- University of Cambridge
- Case Western Reserve University
- University of Chicago
- Drexel University
- Fermilab
- Institute for Advanced Study
- Japan Participation Group
- Johns Hopkins University
- Joint Institute for Nuclear Astrophysics
- Kavli Institute for Particle Astrophysics and Cosmology
- Korean Scientist Group
- Chinese Academy of Sciences (LAMOST)
- Los Alamos National Laboratory
- Max-Planck-Institute for Astronomy (MPIA)
- Max-Planck-Institute for Astrophysics (MPA)
- New Mexico State University
- Ohio State University
- University of Pittsburgh
- University of Portsmouth
- Princeton University
- United States Naval Observatory
- University of Washington
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Context. According to the modern cosmological paradigm, galaxies and galaxy systems form from tiny density perturbations generated during the very early phase of the evolution of the Universe. Aims. Using numerical simulations, we study the evolution of the density perturbation phases of different scales to understand the formation and evolution of the cosmic web. Methods. We apply the wavelet analysis to follow the evolution of high-density regions (clusters and superclusters) of the cosmic web. Results. We show that the maxima and minima positions of density waves (their spatial phases) almost do not change during the evolution of the structure. Positions of density perturbation extrema of are more stable for large scale perturbations. In the context of the present study we call density waves of scale >= 64 h(-1) Mpc large, waves of scale similar or equal to 32 h(-1) Mpc medium, and waves of scale similar or equal to 8 h(-1) Mpc small, within a factor of 2. Conclusions. In the cosmic structure formation of the synchronisation (coupling) of density waves of different scales plays an important role.
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