Science, Space and Technology News 2024
Research led by the University of Tartu reveals deeper distinctions between galaxy groups and clusters than previously understood, identifying two unique classes with their own formation and evolutionary processes. This study, focusing on the cosmic web, advances our knowledge of galaxy system dynamics and the impact of their environments.
The study showed that galaxy groups and clusters can be divided into two classes with quite different properties. The physical processes that influence the formation and evolution of the main galaxies in groups and clusters differ in rich and poor groups. Researchers divided the main galaxies of galaxy groups into galaxies with no active star formation and ones where star formation is currently active . However, they also found red star-forming galaxies among the groups’ main galaxies.
Describing the properties of the structure of the Universe and how they form and evolve is one of the fundamental tasks of cosmology. The results extend our understanding of the formation and evolution of galaxy groups and clusters and their main galaxies in the cosmic web. Rich galaxy clusters can only form in regions where the overall density of matter is sufficiently high and where there is plenty of gas necessary for star formation.
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