Cosmological perturbations in the DGP braneworld: Numeric solution

Authors: Cardoso, A., Koyama, K., Seahra, S.S. and Silva, F.P.

Journal: Physical Review D - Particles, Fields, Gravitation and Cosmology

Volume: 77

Issue: 8

eISSN: 1550-2368

ISSN: 1550-7998

DOI: 10.1103/PhysRevD.77.083512

Abstract:

We solve for the behavior 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 behavior 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. © 2008 The American Physical Society.

Source: Scopus