What is it about?
We use data on galaxies, groups, filaments and the richest galaxy clusters in the nearby Coma and Leo superclusters to study simultaneously substructure, connectivity (number of filaments connected to a cluster), galaxy content of clusters, and the distribution of mass in and around clusters. This combined approach enables us to determine relations between these properties, scaling relations between masses of clusters and their regions of influence, and to find characteristic epochs in the evolution of clusters from turnaround ~ 6 - 7 Gyr ago to virialization in 9 - 10 Gyrs in the future, a period over 15 Gyrs.
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Photo by NASA Hubble Space Telescope on Unsplash
Why is it important?
The study of galaxy clusters, the richest nodes in the cosmic web, gives us information on the properties and evolution of clusters themselves, galaxies within clusters and in their environment, and of superclusters where they reside.
Perspectives
Our study emphasizes the need for the studies of galaxy clusters from various perspectives, including the simultaneous study of clusters and galaxies within, and structures in the cluster environment. Future studies will include data on fainter galaxies, high redshift data, data on the peculiar velocities of galaxies, and multiwavelength data on clusters, to obtain better understanding of cluster evolution, and the evolution of the whole cosmic web.
Dr Maret Einasto
Tartu Observatory
Read the Original
This page is a summary of: The richest clusters in the Coma and Leo superclusters: Properties and evolution, EAS Publications Series, December 2025, EDP Sciences,
DOI: 10.1051/0004-6361/202556023.
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