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Here Is A Summary Paper Relevant To Your Opinion

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Posted by Richard Ruquist on July 3, 2003 11:18:32 UTC

http://arxiv.org/PS_cache/astro-ph/pdf/0307/0307034.pdf

This paper discusses a 5-D universe in which gravitrons migrate away from our 4-d world into the 5th dimension, thereby giving rise to the accelerated expansion. Here is the Abstract:

Differentiating between Modified Gravity and Dark Energy
Authors: Arthur Lue, Roman Scoccimarro, Glenn Starkman
Comments: 15 pages revtex. 1 figure

The nature of the fuel that drives today's cosmic acceleration is an open and tantalizing mystery. We entertain the suggestion that the acceleration is not the manifestation of yet another new ingredient in the cosmic gas tank, but rather a signal of our first real lack of understanding of gravitational physics. By requiring that the underlying gravity theory respects Birkhoff's law, we derive the modified gravitational force-law necessary to generate any given cosmology, without reference to the fundamental theory, revealing modifications of gravity at scales typically much smaller than today's horizon. We discuss how, through these modifications, the growth of density perturbations and even solar-system measurements may be sensitive to whether today's cosmic acceleration is generated by dark energy or modified gravitational dynamics, and are subject to imminent observational discrimination. We argue how these conclusions can be more generic, and not dependent on the validity of Birkhoff's law.

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