Cosmological phase space of R^n gravity

Details Cosmological phase space of R^n gravity Cosmological phase space of R^n gravity

2009-01-23

arxiv.org/abs/0901.3722v1

AIP Conf.Proc.1083:57-64,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

8 pages, 3 figures

Scientific paper

10.1063/1.3058579

We present some exact solutions and a phase space analysis of metric $f(R)$-gravity models of the type $R^{n}$. We divide our discussion in $n\neq2$ and $n=2$ models. The later model is a good approximation, at late times to the $f(R) = \frac{2}{\pi}R \tan^{-1}(R/\beta^2)$ gravity model, being this an example of a non--singular case. For $n \neq 2$ models we have found power law solutions for the scale factor that are attractors and that comply with WMAP 5-years data if $n <-2.55 $ or $ 1.67< n < 2$. On the other hand, the quadratic model has the de Sitter solution as an attractor, that also complies with WMAP 5-years data.

Affiliated with

Also associated with

No associations

Rating

Cosmological phase space of R^n gravity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Cosmological phase space of R^n gravity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmological phase space of R^n gravity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-66301