Behavior of f(R) gravity in the solar system, galaxies, and clusters

	Behavior of f(R) gravity in the solar system, galaxies, and clusters
	Zhang, Pengjie
刊名	PHYSICAL REVIEW D
	2007-07-01
卷号	76 期号:2 页码:1
英文摘要	For cosmologically interesting f(R) gravity models, we derive the complete set of the linearized field equations in the Newtonian gauge, under environments of the solar system, galaxies, and clusters, respectively. Based on these equations, we confirm the previous gamma=1/2 solution in the solar system. However, f(R) gravity models can be strongly environment dependent and the high density (comparing to the cosmological mean) solar system environment can excite a viable gamma=1 solution for some f(R) gravity models. Although for f(R)proportional to-1/R, it is not the case; for f(R)proportional to-exp(-R/lambda H-2(0)2), such a gamma=1 solution does exist. This solution is virtually indistinguishable from that in general relativity (GR) and the value of the associated curvature approaches the GR limit, which is much higher than the value in the gamma=1/2 solution. We show that for some forms of f(R) gravity, this solution is physically stable in the solar system and can smoothly connect to the surface of the Sun. The derived field equations can be applied directly to gravitational lensing of galaxies and clusters. We find that, despite a significant difference in the environments of galaxies and clusters comparing to that of the solar system, gravitational lensing of galaxies and clusters can be virtually identical to that in GR, for some forms of f(R) gravity. Fortunately, galaxy rotation curve and intracluster gas pressure profile may contain valuable information to distinguish these f(R) gravity models from GR.
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]	PALATINI FORMULATION ; 1/R GRAVITY ; SCALAR ; BRANE
收录类别	SCI
语种	英语
WOS记录号	WOS:000248545200033
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/19331]
专题	上海天文台_星系宇宙学重点实验室
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.USTC, Hefei, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Pengjie. Behavior of f(R) gravity in the solar system, galaxies, and clusters[J]. PHYSICAL REVIEW D,2007,76(2):1.
APA	Zhang, Pengjie.(2007).Behavior of f(R) gravity in the solar system, galaxies, and clusters.PHYSICAL REVIEW D,76(2),1.
MLA	Zhang, Pengjie."Behavior of f(R) gravity in the solar system, galaxies, and clusters".PHYSICAL REVIEW D 76.2(2007):1.