ВИКОРИСТАННЯ CLUSTER CARTOGRAPHY 2D+ ДЛЯ ВИЯВЛЕННЯ СУБСТРУКТУР У 3D СКУПЧЕННЯХ ГАЛАКТИКИ

In our detailed study of the inner structure of PF galaxy clusters, we found different kinds of substructures in these objects. Most of the detected substructures are quite common. In addition to the classical filamentary features described by Rood and coauthors’ papers, we include complex cross-shaped substructures and short dense chains of galaxies as regular. We suppose that regular substructures are connected with the Large-Scale Structure of the Universe elements, which form the parent cluster node. Our previous studies were based on the list of galaxies of the Muenster Red Sky Survey, which has no redshifts. It allowed us to study only the 2D distribution of galaxies inside the cluster. Modern data, such as the Sloan Digital Sky Survey, the VIMOS Public Extragalactic Redshift Survey, the Euclid Wide Survey, and others, give us the opportunity for 3D studies of these objects. We improved the base online version of the “Cluster Cartography 2D” tool (https://clustercartography.github.io/) into the “Cluster Cartography 2D+” tool. It allows to apply the algorithms developed for 2D version to the detection of regular substructures on a statistically significant level for the 3D distribution of galaxies in the rectangular projections. We tested this opportunity on artificial galaxy clusters with different kinds of substructures. We have shown that using 2D projections allows us to detect the 3D regular substructures, and to restore their real shapes and directions.