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Four dimensional (4D) cosmological model from a 5D reduction | | Xin-He Meng
; Jie Ren
; | | Date: |
10 Jan 2007 | | Abstract: | A five dimensional Einstein equation with its right hand side empty, one of the simplest extended gravity models by one more spacial dimension induces a four-dimensional cosmological model accordingly, which suggests that the Universe mass originates from the one more extra dimension [P.S. Wesson, Space-Time-Matter, World Scientific, Singapore, 1999]. We consider the case that a cosmological constant exists in the 5D Universe and obtain an exact solution. In this 5D Universe with cosmological constant, not only can it be naturally reduced to the power-law $Lambda$CDM model for the 4D real Universe, but also the arbitrary functions and constants in the metric are endowed with explicit physical meanings. Phantom matter and cosmological constant behaviors are realized in two simple cases of the extended gravity model. | | Source: | arXiv, astro-ph/0701298 | | Services: | Forum | Review | PDF | Favorites | |
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