Cosmic Acceleration and Modified Gravity

Details Cosmic Acceleration and Modified Gravity Cosmic Acceleration and Modified Gravity

2006-07-21

arxiv.org/abs/astro-ph/0607510v1

Int.J.Mod.Phys.D16:2065-2074,2008

Astronomy and Astrophysics

Astrophysics

12 pages, 1 figure. Invited talk at the NASA workshop - From Quantum to Cosmos: Fundamental Physics Research in Space, May 21-

Scientific paper

10.1142/S0218271807011723

I briefly discuss some attempts to construct a consistent modification to General Relativity (GR) that might explain the observed late-time acceleration of the universe and provide an alternative to dark energy. I mention the issues facing extensions to GR, illustrate these with two specific examples, and discuss the resulting observational and theoretical obstacles. This article comprises an invited talk at the NASA workshop {\it From Quantum to Cosmos: Fundamental Physics Research in Space}

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