What is it about?
We analysed the properties of galaxies and galaxy clusters in one of the richest know superclusters, the Corona Borealis supercluster and showed that the richest clusters are surrounded by regions of influence in which galaxies and groups are falling into clusters. During the future evolutuion the supercluster itself will break into two superclusters, one of these will form one of the largest gravitationally bound structures in the Local Universe.
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Why is it important?
Galaxy superclusters with their complex inner structure, where rich galaxy clusters are connected by filaments of galaxies and galaxy groups can be considered as mini-Universes - high-density regions of the cosmic web. They are ideal laboratories to study the evolution of galaxies and galaxy clusters within them. Our study suggest that the richest galaxy clusters in the Corona Borealis supercluster passed turnaround and started to collapse approximately 3 - 4 billion years ago. Rich clusters with their surrounding regions in the Corona Borealis supercluster are so massive that in the future they will probably form one huge massive system. This will be one of the most massive gravitationally bound systems in the local Universe.
Perspectives
Our study shows that collapsing cores of rich galaxy superclusters are the largest gravitationally bound objects in the Universe, and their properties can be used to challenge various cosmological models. Data from multiwavelength, deep ongoing and future surveys can be used to trace the evolution of galaxy clusters and their regions of dynamical influence in detail.
Dr Maret Einasto
Tartu Observatory
Read the Original
This page is a summary of: The Corona Borealis supercluster: connectivity, collapse, and evolution, Astronomy and Astrophysics, May 2021, EDP Sciences,
DOI: 10.1051/0004-6361/202040200.
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