Second-order cosmological perturbation theory and initial conditions for N-body simulations

被引：12

作者：

Christopherson, Adam J. ^{[1
]}

Carlos Hidalgo, Juan ^{[2
]}

Rampf, Cornelius ^{[3
]}

Malik, Karim A. ^{[4
]}

机构：

[1] Univ Florida, Dept Phys, Gainesville, FL 32611 USA

[2] Univ Nacl Autonoma Mexico, Inst Ciencias Fis, Ave Univ S-N, Cuernavaca 62251, Morelos, Mexico

[3] Univ Portsmouth, Inst Cosmol & Gravitat, Dennis Sciama Bldg,Burnaby Rd, Portsmouth PO1 3FX, Hants, England

[4] Queen Mary Univ London, Sch Phys & Astron, Astron Unit, Mile End Rd, London E1 4NS, England

来源：

PHYSICAL REVIEW D | 2016年 / 93卷 / 04期

关键词：

TRANSIENTS; EVOLUTION;

D O I：

10.1103/PhysRevD.93.043539

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We use gauge-invariant cosmological perturbation theory to calculate the displacement field that sets the initial conditions for N-body simulations. Using first-and second-order fully relativistic perturbation theory in the synchronous-comoving gauge allows us to go beyond the Newtonian predictions and to calculate relativistic corrections to it. We use an Einstein-de Sitter model, including both growing and decaying modes in our solutions. The impact of our results should be assessed through the implementation of the featured displacement in cosmological N-body simulations.

引用

页数：12

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