Formation and evolution of heavy sub-structures in the centre of galaxy clusters: the local effect of dark energy

2016/06/15 by Manuel Arca Sedda, Sedda, Manuel Arca, Martina Donnari +3
Physics and Astronomy · #Astrophysics of Galaxies (astro-ph.GA) #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Scientific Research and Discoveries #Stellar, planetary, and galactic studies

paper · pdf · doi:10.48550/arxiv.1606.05266

openalex publication_date 2016/06/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We discuss how the centres of galaxy clusters evolve in time, showing the results of a series of direct N-body simulations. In particular, we followed the evolution of a galaxy cluster with a mass M_clus ≃ 10¹⁴ M_\odot in different configurations. The dynamical evolution of the system leads in all the cases to the formation of dense and massive sub-structures in the cluster centre, that form in consequence of a series of collisions and merging among galaxies travelling in the cluster core. We investigate how the structural properties of the main merging product depends on the characteristics of those galaxies that contributed to its formation.

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