Cosmic Acceleration and Modified Gravitational Models

Details Cosmic Acceleration and Modified Gravitational Models Cosmic Acceleration and Modified Gravitational Models

2004-11-08

arxiv.org/abs/astro-ph/0411209v2

Int.J.Mod.Phys.A19:5343-5350,2004

Astronomy and Astrophysics

Astrophysics

11 pages, 3 figures, references added; Based on talks given at MRST-04, PASCOS-04 and COSMO-04

Scientific paper

10.1142/S0217751X04022578

There is now overwhelming observational evidence that our Universe is accelerating in its expansion. I discuss how modified gravitational models can provide an explanation for this observed late-time cosmic acceleration. We consider specific low-curvature corrections to the Einstein-Hilbert action. Many of these models generically contain unstable de Sitter solutions and, depending on the parameters of the theory, late-time accelerating attractor solutions.

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