We consider the case of Rn-gravity and perform a detailed analysis of the dynamics in Bianchi I cosmologies which exhibit 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. © 2008 World Scientific Publishing Co. Pte. Ltd.
Shear dynamics in bianchi i cosmologies with Rn-gravity
Carloni S.
2008-01-01
Abstract
We consider the case of Rn-gravity and perform a detailed analysis of the dynamics in Bianchi I cosmologies which exhibit 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. © 2008 World Scientific Publishing Co. Pte. Ltd.
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