E. V. Arbuzova, A. D. Dolgov
Published 2010-12-09, updated 2011-11-03Version 3
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.
Comments: 10 pages, 3 figures, version published in PLB, a few references are added and the expression for the frequency of oscillations is corrected
Journal: Phys. Lett. B 700, 289-293 (2011)
Systematic simulations of modified gravity: chameleon models
Cosmological Large-scale Structures beyond Linear Theory in Modified Gravity
How Do You Solve a Problem Like Modified Gravity? Challenges in Connecting Theory and Observations
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