53 citations · 109 across the 17 of their papers we have counts for
5 papers · 1 filter
Massive black holes interactions during the assembly of heavy sub-structures in the centre of galaxy clusters
M. Donnari, M. Arca-Sedda, M. Merafina
We performed a series of direct N-body simulations with the aim to follow the dynamical evolution of a galaxy cluster (GC) () in different environ…
Can dark energy explain the observed outflow in galaxy clusters?
M. Donnari, M. Arca-Sedda, M. Merafina
Recent observations of the Virgo cluster and the Local Group suggested that some galaxies are flowing out from their parent cluster. This may be the signature that dark energy (DE)…
Formation and evolution of heavy sub-structures in the centre of galaxy clusters: the local effect of dark energy
Manuel Arca Sedda, Martina Donnari, Marco Merafina
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 clu…
The local effect of Dark Energy in galaxy clusters
Martina Donnari, Marco Merafina, Manuel Arca-Sedda
Recently, observational data and high precision mapping of the local velocity field of Local Group and Virgo cluster have revealed a linear velocity-distance relation of the outerm…
A General Criterion for the Dynamical Stability of Anisotropic Newtonian Systems
Giuseppe Alberti, Marco Merafina
The problem of the dynamical stability of anistropic systems is studied, by proposing a criterion in terms of the adiabatic local index . The result has general validity and can…