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Recent observations of the Virgo cluster and the Local Group suggested thatsome galaxies are flowing out from their parent cluster. This may be thesignature that dark energy (DE) acts significantly also on small cosmologicalscales. By means of direct N-body simulations we performed several simulations,in which the effect of DE and gravity are taken into account, aiming todetermine whether DE can produce an outflow of galaxies compatible withobservations. Comparing the different simulations, our results suggest that theobserved outflow of galaxies is likely due to the local effect of DE.

Can dark energy explain the observed outflow in galaxy clusters?