Dark energy in five-dimensional Brans-Dicke cosmology with dimensional reduction

Details Dark energy in five-dimensional Brans-Dicke cosmology with dimensional reduction Dark energy in five-dimensional Brans-Dicke cosmology with dimensional reduction

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011raa....11..888r&link_type=abstract

Research in Astronomy and Astrophysics, Volume 11, Issue 8, pp. 888-894 (2011).

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

We explore a 5D Brans-Dicke scalar cosmology by conjecturing that the four-dimensional Hubble parameter varies as H = inphis, in in ℝ and s is some unknown power index and that the extra-dimensions compactify as the visible dimensions expand as b(t) ≈ ax(t), x in ℝ-. We mainly discuss the case x = -1. For critical values of in close to unity, it was observed that the acceleration of the universe occurs at red-shift close to z = 0.8 which indicates that in our model, accelerated expansion of the universe began only recently. Several interesting points are revealed and discussed in some detail.

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