Bianchi type I universes with dilaton and magnetic fields

Details Bianchi type I universes with dilaton and magnetic fields Bianchi type I universes with dilaton and magnetic fields

2002-10-22

arxiv.org/abs/gr-qc/0210073v1

Int.J.Mod.Phys. D11 (2002) 1171-1182

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages, 4 figures

Scientific paper

10.1142/S0218271802002141

We consider the dynamics of a Bianchi type I spacetime in the presence of dilaton and magnetic fields. The general solution of the Einstein-Maxwell dilaton field equations can be obtained in an exact parametric form. Depending on the numerical values of the parameters of the model there are three distinct classes of solutions. The time evolution of the mean anisotropy, shear and deceleration parameter is considered in detail and it is shown that a magnetic-dilaton anisotropic Bianchi type I geometry does not isotropize, the initial anisotropy being present in the universe for all times.

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