Oscillations of the F(R) dark energy in the accelerating universe

Details Oscillations of the F(R) dark energy in the accelerating universe Oscillations of the F(R) dark energy in the accelerating universe

2011-08-31

arxiv.org/abs/1108.6184v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

23 pages, 11 figures, version to appear in EPJC

Scientific paper

Oscillations of the $F(R)$ dark energy around the phantom divide line, $\omega_{DE}=-1$, both during the matter era and also in the de Sitter epoch are investigated. The analysis during the de Sitter epoch is revisited by expanding the modified equations of motion around the de Sitter solution. Then, during the matter epoch, the time dependence of the dark energy perturbations is discussed by using two different local expansions. For high values of the red shift, the matter epoch is a stable point of the theory, giving the possibility to expand the $F(R)$-functions in terms of the dark energy perturbations. In the late-time matter era, the realistic case is considered where dark energy tends to a constant. The results obtained are confirmed by precise numerical computation on a specific model of exponential gravity. A novel and very detailed discussion is provided on the critical points in the matter era and on the relation of the oscillations with possible singularities.

Affiliated with

Also associated with

No associations

Rating

Oscillations of the F(R) dark energy in the accelerating universe 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 Oscillations of the F(R) dark energy in the accelerating universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oscillations of the F(R) dark energy in the accelerating universe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-625590