The effect of galaxy cluster dynamics on their populations and fundamental relations at low redshift
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Monday 8th
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The effect of galaxy cluster dynamics on their populations and fundamental relations at low redshift
In the context of the standard cosmological model ΛCDM, massive galaxy clusters form hierarchically through merging and smooth accretion. The model predicts that numerous clusters of galaxies are in some stage of merging at any epoch. These processes are the most powerful events in the universe after the Big Bang, releasing energy at 10⁶⁴ erg/s, making them unique laboratories to study galaxy evolution. Under such conditions, galaxies may undergo violent processes that alter their physical properties and morphology.
In this study, by combining optical and X-ray data, we find that the dynamical state of low-redshift clusters (0.10 < z < 0.35) significantly impacts the physical and structural properties of their member galaxies differentially. Furthermore, we conclude that the dynamics of these systems also modify the mass-size relations, but not the red cluster sequence nor the morphology-density relation.