Inflation and accelerated expansion TeVeS cosmological solutions

Details Inflation and accelerated expansion TeVeS cosmological solutions Inflation and accelerated expansion TeVeS cosmological solutions

2006-01-07

arxiv.org/abs/astro-ph/0601153v2

Physical Review D, vol. 73, Issue 8, id. 083503, (2006)

Astronomy and Astrophysics

Astrophysics

Revised version, Phys.Rev.D in press

Scientific paper

10.1103/PhysRevD.73.083503

We find exact exponentially expanding and contracting de Sitter solutions of the spatially homogeneous TeVeS cosmological equations of motion in the vacuum TeVeS model and a power law accelerated expanding solution in thepresence of an additional ideal fluid with equation of state parameter $-5/3 < \omega < -1$. A preliminary stability analysis shows that the expanding vacuum solution is stable, while in the ideal fluid case stability depends on model parameter values. These solutions might provide a basis for incorporating early-time inflation or late-time accelerated expansion in TeVeS cosmology.

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