Characteristic density contrasts in the evolution of superclusters. The case of A2142 supercluster

Abstract

The formation and evolution of the cosmic web in which galaxy superclusters are the largest relatively isolated objects is governed by a gravitational attraction of dark matter and antigravity of dark energy (cosmological constant). We study the characteristic density contrasts in the spherical collapse model for several epochs in the supercluster evolution and their dynamical state. We analysed the density contrasts for the turnaround, future collapse and zero gravity in different LCDM models and applied them to study the dynamical state of the supercluster A2142 with an almost spherical main body. The analysis of the supercluster A2142 shows that its high-density core has already started to collapse. The zero-gravity line outlines the outer region of the main body of the supercluster. In the course of future evolution the supercluster may split into several collapsing systems. The various density contrasts presented in our study and applied to the supercluster A2142 offer a promising way to characterise the dynamical state and expected future evolution of galaxy superclusters.

6 pages, 2 figures, Astronomy and Astrophysics, in press

References in corpus (9)

• The stripping of a galaxy group diving into the massive cluster A2142
• On the definition of superclusters
• The Limits of Bound Structures in the Accelerating Universe
• Unusual A2142 supercluster with a collapsing core: distribution of light and mass
• Characterising superclusters with the galaxy cluster distribution
• The Largest Gravitationally Bound Structures: The Corona Borealis Supercluster - Mass and Bound Extent
• A graph of dark energy significance on different spatial and mass scales
• SUZAKU Observation of a New Merging Group of Galaxies at a Filamentary Junction
• The richest superclusters. I. Morphology

Cited by in corpus (18)

• The two-component giant radio halo in the galaxy cluster Abell 2142
• The XMM Cluster Outskirts Project (X-COP): Physical conditions to the virial radius of Abell 2142
• Deep Chandra observations of the stripped galaxy group falling into Abell 2142
• Sloan Great Wall as a complex of superclusters with collapsing cores
• Multiscale cosmic web detachments, connectivity, and preprocessing in the supercluster SClA2142 cocoon
• Supercluster A2142 and collapse in action - infalling and merging groups and galaxy transformations
• Evolution of superclusters in the cosmic web
• Infalling groups and galaxy transformations in the cluster A2142
• A three-component giant radio halo: the puzzling case of the galaxy cluster Abell 2142
• The Corona Borealis supercluster: connectivity, collapse, and evolution
• Star Formation and Supercluster Environment of 107 Nearby Galaxy Clusters
• The evolution of high-density cores of the BOSS Great Wall superclusters
• Future dynamics of FLRW for the massless-scalar field system with positive cosmological constant
• Quasi-spherical superclusters
• Galaxy Superclusters and Their Complexes in the Cosmic Web
• Does the Corona Borealis Supercluster form a giant binary-like system?
• Collapse, connectivity, and galaxy populations in supercluster cocoons: the case of A2142
• The richest clusters in the Coma and Leo superclusters: Properties and evolution