f(R) cosmological solutions with varying speed of light

Details f(R) cosmological solutions with varying speed of light f(R) cosmological solutions with varying speed of light

2010-01-24

arxiv.org/abs/1001.4233v1

Physics Letters B 684 (2010) 185--193

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

15 pages, to appear in PLB

Scientific paper

10.1016/j.physletb.2010.01.028

We consider f(R) modified gravity theories for describing varying speed of light in a spatially flat FRW model, and find some exact solutions. Also we examine the dynamics of this model by dynamical system method assuming a LambdaCDM background and we find some exact solutions by considering the character of critical points of the theory in both formalisms. The behaviour of the speed of light is obtained.

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