High energy description of dark energy in an approximate 3-brane Brans-Dicke cosmology

Details High energy description of dark energy in an approximate 3-brane Brans-Dicke cosmology High energy description of dark energy in an approximate 3-brane Brans-Dicke cosmology

2006-02-15

arxiv.org/abs/gr-qc/0602061v2

Phys.Lett. B641 (2006) 357-361

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

9 pages

Scientific paper

10.1016/j.physletb.2006.08.063

We consider a Brans-Dicke cosmology in five-dimensional space-time. Neglecting the quadratic and the mixed Brans-Dicke terms in the Einstein equation, we derive a modified wave equation of the Brans-Dicke field. We show that, at high energy limit, the 3-brane Brans-Dicke cosmology could be described as the standard one by changing the equation of state. Finally as an illustration of the purpose, we show that the dark energy component of the universe agrees with the observations data.

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