An analysis of the shear dynamics in Bianchi I cosmologies with $R^n$-gravity

Details An analysis of the shear dynamics in Bianchi I cosmologies with $R^n$-gravity An analysis of the shear dynamics in Bianchi I cosmologies with $R^n$-gravity

2007-02-23

arxiv.org/abs/gr-qc/0702122v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, 2 figures; to appear in the proceedings of the MG11

Scientific paper

We consider the case of $R^n$-gravity and perform a detailed analysis of the dynamics in Bianchi I cosmologies which exhibit {\it local rotational symmetry} (LRS). We find exact solutions and study their behaviour and stability in terms of the values of the parameter $n$. In particular, we found a set of cosmic histories in which the universe is initially isotropic, then develops shear anisotropies which approaches a constant value.

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