On the Lambda-evolution of galaxy clusters

Abstract

The evolution of galaxy clusters can be affected by the repulsion described by the cosmological constant. This conclusion is reached within the modified weak-field General Relativity approach where the cosmological constant Λenables to describe the common nature of the dark matter and the dark energy. Geometrical methods of theory of dynamical systems and the Ricci curvature criterion are used to reveal the difference in the instability properties of galaxy clusters which determine their evolutionary paths. Namely, it is shown that the clusters determined by the gravity with Λ-repulsion tend to become even more unstable than those powered only by Newtonian gravity, the effect to be felt at cosmological time scales.

7 pages, 5 figs, Eur.Phys. J. C (in press), to match the published version

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• Neural Network Analysis of S-Star Dynamics: Implications for Modified Gravity
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• Galaxy cluster hydrostatic bias in Kottler spacetime
• Tidal disruption effects near black holes and Lambda-gravity
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