Spherical collapse in f(R) gravity

	Spherical collapse in f(R) gravity
	Borisov, Alexander 1; Jain, Bhuvnesh 1; Zhang, Pengjie 2
刊名	PHYSICAL REVIEW D
	2012-03-23
卷号	85 期号:6 页码:63518
英文摘要	We use one-dimensional numerical simulations to study spherical collapse in the f(R) gravity models. We include the nonlinear self-coupling of the scalar field in the theory and use a relaxation scheme to follow the collapse. We find an unusual enhancement in density near the virial radius which may provide observable tests of gravity. We also use the estimated collapse time to calculate the critical overdensity delta(c) c used in calculating the mass function and bias of halos. We find that analytical approximations previously used in the literature do not capture the complexity of nonlinear spherical collapse.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics ; Physics, Particles & Fields
研究领域[WOS]	Astronomy & Astrophysics ; Physics
关键词[WOS]	DARK ENERGY ; CONSTRAINTS ; COSMOLOGY ; BRANE ; SPACE
收录类别	SCI
语种	英语
WOS记录号	WOS:000301843600004
公开日期	2015-01-27
内容类型	期刊论文
源URL	[http://119.78.226.72//handle/331011/15465]
专题	上海天文台_星系宇宙学重点实验室
作者单位	1.Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA 2.Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai, Peoples R China
推荐引用方式 GB/T 7714	Borisov, Alexander,Jain, Bhuvnesh,Zhang, Pengjie. Spherical collapse in f(R) gravity[J]. PHYSICAL REVIEW D,2012,85(6):63518.
APA	Borisov, Alexander,Jain, Bhuvnesh,&Zhang, Pengjie.(2012).Spherical collapse in f(R) gravity.PHYSICAL REVIEW D,85(6),63518.
MLA	Borisov, Alexander,et al."Spherical collapse in f(R) gravity".PHYSICAL REVIEW D 85.6(2012):63518.