Qualitative Properties of Magnetic Fields in Scalar Field Cosmology

Details Qualitative Properties of Magnetic Fields in Scalar Field Cosmology Qualitative Properties of Magnetic Fields in Scalar Field Cosmology

2001-08-15

arxiv.org/abs/astro-ph/0108268v1

Phys.Rev. D64 (2001) 122003

Astronomy and Astrophysics

Astrophysics

12 pages, 2 figures in REVTeX format. to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.64.122003

We study the qualitative properties of the class of spatially homogeneous Bianchi VI_o cosmological models containing a perfect fluid with a linear equation of state, a scalar field with an exponential potential and a uniform cosmic magnetic field, using dynamical systems techniques. We find that all models evolve away from an expanding massless scalar field model in which the matter and the magnetic field are negligible dynamically. We also find that for a particular range of parameter values the models evolve towards the usual power-law inflationary model (with no magnetic field) and, furthermore, we conclude that inflation is not fundamentally affected by the presence of a uniform primordial magnetic field. We investigate the physical properties of the Bianchi I magnetic field models in some detail.

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