Structure of the Clusters of Galaxies A 2634, A 1983, and DC 0428-53

The hierarchical and dynamical structure of three clusters of galaxies, A 2634, A 1983, and DC 0428-53, is investigated. Based on their example, we can say that the central cD galaxies play the leading role in clusters, affecting the course of their evolution. Radio and x-ray galaxies are not always part of the substructure. The morphological composition of various hierarchical subgroups depends on the stage of evolution. Clusters have a tendency to be oriented in the direction toward the nearest neighbor.