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FIZIKA B 19 (2010) 3, 169-176
 
LETTER TO THE EDITOR
MODIFIED GAUSS-BONNET-BRANS-DICKE COSMOLOGY WITH FREEZING SCALAR POTENTIALS
RAMI AHMAD EL-NABULSI
College of Mathematics and Information Science, Qujing Normal University, Qujing, Yunnan 655011, PR China
E-mail address: [email protected]
Received 14 November 2007; Revised manuscript received 13 July 2010
Accepted 24 November 2010 Online 7 March 2011
In this letter, we discuss the late-time dynamics of a modified Gauss-Bonnet
gravity theory à la Brans-Dicke, dominated by freezing potentials V(ϕ)~
ϕ−n,
n element of R. For a certain choice of the parameter n,
it is observed that the universe is dominated by dark
energy, accelerated in time and controlled by the
Gauss-Bonnet invariant term. Besides, the Brans-Dicke
parameter ω >> 1 compatible with some recent reports
where this bound is updated by several thousands following
from the bound on "γ−1" from the Cassini
mission, ~γ being the PPN parameter. Many
additional interesting features are raised and discussed
in some details.
PACS numbers: 04.50.+h, 11.25.Yb, 98.80.Es, 95.36.+x
UDC 524.83
Keywords: modified Gauss-Bonnet gravity, dark energy, scaling solutions, accelerated expansion
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