Shear and Vorticity in an Accelerating Brans-Dicke Lambda-Universe with Torsion

Details Shear and Vorticity in an Accelerating Brans-Dicke Lambda-Universe with Torsion Shear and Vorticity in an Accelerating Brans-Dicke Lambda-Universe with Torsion

2008-07-11

arxiv.org/abs/0807.1866v2

Astrophys.Space Sci.317:279-281,2008

Physics

General Physics

To be published by Astrophys. and Space Science

Scientific paper

10.1007/s10509-008-9879-3

We study accelerating Universes with power-law scale-factors. We include shear and vorticity, a cosmological "constant" term, and spin from torsion, as in Einstein-Cartan's theory when a scalar-field of Brans-Dicke type acts in the model. We find a "no-hair" result, for shear and vorticity; we also make contact with the alternative Machian picture of the Universe. Keywords: Cosmology; Einstein; Brans-Dicke; Cosmological term; Shear; Spin; Vorticity; Inflation; Einstein-Cartan; Torsion; Accelerating Universe

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