Cosmological perturbations in the DGP braneworld: numeric solution

Details Cosmological perturbations in the DGP braneworld: numeric solution Cosmological perturbations in the DGP braneworld: numeric solution

2007-11-16

arxiv.org/abs/0711.2563v2

Phys.Rev.D77:083512,2008

Astronomy and Astrophysics

Astrophysics

Typos corrected, including a misprint in Eq. (34). 16 pages, 10 figures

Scientific paper

10.1103/PhysRevD.77.083512

We solve for the behaviour of cosmological perturbations in the Dvali-Gabadadze-Porrati (DGP) braneworld model using a new numerical method. Unlike some other approaches in the literature, our method uses no approximations other than linear theory and is valid on large scales. We examine the behaviour of late-universe density perturbations for both the self-accelerating and normal branches of DGP cosmology. Our numerical results can form the basis of a detailed comparison between the DGP model and cosmological observations.

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