Explosive phenomena in modified gravity

Details Explosive phenomena in modified gravity Explosive phenomena in modified gravity

2010-12-09

arxiv.org/abs/1012.1963v3

Phys. Lett. B 700, 289-293 (2011)

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

10 pages, 3 figures, version published in PLB, a few references are added and the expression for the frequency of oscillations

Scientific paper

Observational manifestations of some models of modified gravity, which have been suggested to explain the accelerated cosmological expansion, are analyzed for gravitating systems with time dependent mass density. It is shown that if the mass density rises with time, the system evolves to the singular state with infinite curvature scalar. The corresponding characteristic time is typically much shorter than the cosmological time.

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