Imprint of f(R) gravity on nonlinear structure formation

被引：34

作者：

Achitouv, Ixandra ^{[1
,2
]}

Baldi, Marco ^{[3
,4
,5
]}

Puchwein, Ewald ^{[6
,7
]}

Weller, Jochen ^{[8
,9
,10
]}

机构：

[1] Swinburne Univ Technol, Ctr Astrophys & Supercomp, POB 218, Hawthorn, Vic 3122, Australia

[2] ARC Ctr Excellence All Sky Astrophys CAASTRO, 44 Rosehill St, Redfern, NSW 2016, Australia

[3] Alma Mater Studiorum Univ Bologna, Dipartimento Fis & Astron, Viale Berti Pichat 6-2, I-40127 Bologna, Italy

[4] INAF Osservatorio Astron Bologna, Via Ranzani 1, I-40127 Bologna, Italy

[5] INFN Sez Bologna, Viale Berti Pichat 6-2, I-40127 Bologna, Italy

[6] Univ Cambridge, Kavli Inst Cosmol Cambridge, Madingley Rd, Cambridge CB3 0HA, England

[7] Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England

[8] Univ Munich, Fak Phys, Univ Sternwarte, Scheinerstr 1, D-81679 Munich, Germany

[9] Excellence Cluster Universe, Boltzmannstr 2, D-85748 Garching, Germany

[10] Max Planck Inst Extraterr Phys, Giessenbachstr 1, D-85748 Garching, Germany

来源：

PHYSICAL REVIEW D | 2016年 / 93卷 / 10期

基金：

澳大利亚研究理事会;

关键词：

DARK-MATTER HALOES; MASS FUNCTION; COSMIC VOIDS; ANALYTIC MODEL; POWER SPECTRUM; EVOLUTION; ENERGY; UNIVERSALITY; BIAS; SIMULATIONS;

D O I：

10.1103/PhysRevD.93.103522

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We test the imprint of f(R) modified gravity on the halo mass function, using N-body simulations and a theoretical model developed in [M. Kopp et al., Phys. Rev. D 88, 084015 (2013)]. We find a good agreement between theory and simulations similar to 5%. We extend the theoretical model to the conditional mass function and apply it to the prediction of the linear halo bias in f(R) gravity. Using the halo model we obtain a prediction for the nonlinear matter power spectrum accurate to similar to 10% at z = 0 and up to k = 2h/Mpc. We also study halo profiles for the f(R) models and find a deviation from the standard general relativity (GR) result up to 40%, depending on the halo masses and redshift. This has not been pointed out in previous analysis. Finally we study the number density and profiles of voids identified in these f(R) N-body simulations. We underline the effect of the bias and the sampling to identify voids. We find significant deviation from GR when measuring the f(R) void profiles with f(R0) < -10(-6).

引用

页数：16

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