https://doi.org/10.1140/epjc/s10052-019-7597-3
Regular Article - Theoretical Physics
On the Lambda-evolution of galaxy clusters
1
Center for Cosmology and Astrophysics, Alikhanian National Laboratory, Yerevan State University, Yerevan, Armenia
2
SIA, Sapienza Universita di Roma, Rome, Italy
3
School of Physics and Astronomy, Monash University, Clayton, VIC, Australia
* e-mail: gurzadyan@yerphi.am
Received:
14
November
2019
Accepted:
26
December
2019
Published online:
11
January
2020
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 
enables 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 gravity with -repulsion tend to become even more unstable than those powered only by Newtonian gravity, the effect to be felt at cosmological time scales.
© The Author(s), 2020
