Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-05-12
Class.Quant.Grav. 23 (2006) 3195-3204
Astronomy and Astrophysics
Astrophysics
5 pages, revtex4
Scientific paper
10.1088/0264-9381/23/9/027
We consider modifications to the Friedmann equation motivated by recent proposals along these lines pursuing an explanation to the observed late time acceleration. Here we show those modifications can be framed within a theory with self-interacting gravity, where the term self-interaction refers here to the presence of functions of $\rho$ and $p$ in the right hand side of the Einstein equations. We then discuss the construction of the duals of the cosmologies generated within that framework. After that we investigate the modifications required to generate generalized and modified Chaplygin cosmologies and show that their duals belong to a larger family of cosmologies we call extended Chaplygin cosmologies. Finally, by letting the parameters of those models take values not earlier considered in the literature we show some representatives of that family of cosmologies display sudden future singularities, which indicates their behavior is rather different from generalized or modified Chaplygin gas cosmologies. This reinforces the idea that modifications of gravity can be responsible for unexpected evolutionary features in the universe.
Chimento Luis P.
Lazkoz Ruth
No associations
LandOfFree
Duality extended Chaplygin cosmologies with a big rip 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 Duality extended Chaplygin cosmologies with a big rip, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Duality extended Chaplygin cosmologies with a big rip will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-164000