Cosmological perturbations in the DGP braneworld: Numeric solution

被引：42

作者：

Cardoso, Antonio ^{[1
]}

Koyama, Kazuya ^{[1
]}

Seahra, Sanjeev S. ^{[1
,2
]}

Silva, Fabio P. ^{[1
]}

机构：

[1] Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 2EG, Hants, England

[2] Univ New Brunswick, Dept Math & Stat, Fredericton, NB E3B 5A3, Canada

来源：

PHYSICAL REVIEW D | 2008年 / 77卷 / 08期

基金：

英国工程与自然科学研究理事会; 英国科学技术设施理事会;

关键词：

D O I：

10.1103/PhysRevD.77.083512

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：16

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