Modified scalar-tensor-vector gravity theory and the constraint on its parameters

	Modified scalar-tensor-vector gravity theory and the constraint on its parameters
	Deng, Xue-Mei 1; Xie, Yi 2; Huang, Tian-Yi 2,3
刊名	PHYSICAL REVIEW D
	2009-02-01
卷号	79 期号:4 页码:1
英文摘要	A gravity theory called scalar-tensor-vector gravity (STVG) has been recently developed and succeeded in solar system, astrophysical, and cosmological scales without dark matter 1. However, two assumptions have been used: (i) B(r)=A(-1)(r), where B(r) and A(r) are g(00) and g(rr) in the Schwarzschild coordinates (static and spherically symmetric); (ii) scalar field G=Const. in the solar system. These two assumptions actually imply that the standard parametrized post-Newtonian parameter gamma=1. In this paper, we relax these two assumptions and study STVG further by using the post-Newtonian approximation approach. With abandoning the assumptions, we find gamma not equal 1 in general cases of STVG. Then, a version of modified STVG is proposed through introducing a coupling function of scalar field G: theta(G). We have derived the metric and equations of motion in 1PN for general matter without specific equation of state and N point masses firstly. Subsequently, the secular periastron precession omega of binary pulsars in harmonic coordinates is given. After discussing two parametrized post-Newtonian parameters (gamma and beta) and two Yukawa parameters (alpha and lambda), we use omega of four binary pulsars data (PSR B1913+16, PSR B1534+12, PSR J0737-3039, and PSR B2127+11C) to constrain the Yukawa parameters for modified STVG: lambda=(3.97 +/- 0.01)x10(8) m and alpha=(2.40 +/- 0.02)x10(-8) if we fix \|2 gamma-beta-1\|=0.
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]	POST-NEWTONIAN EQUATIONS ; PREFERRED-FRAME THEORIES ; NONBARYONIC DARK-MATTER ; GENERAL-RELATIVITY ; GRAVITATIONAL-WAVES ; CONSERVATION LAWS ; EQUIVALENCE PRINCIPLE ; EARTH-SATELLITE ; MASSIVE BODIES ; BINARY-SYSTEMS
收录类别	SCI
语种	英语
WOS记录号	WOS:000263816800065
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/19561]
专题	上海天文台_天文地球动力学研究中心
作者单位	1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China 3.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
推荐引用方式 GB/T 7714	Deng, Xue-Mei,Xie, Yi,Huang, Tian-Yi. Modified scalar-tensor-vector gravity theory and the constraint on its parameters[J]. PHYSICAL REVIEW D,2009,79(4):1.
APA	Deng, Xue-Mei,Xie, Yi,&Huang, Tian-Yi.(2009).Modified scalar-tensor-vector gravity theory and the constraint on its parameters.PHYSICAL REVIEW D,79(4),1.
MLA	Deng, Xue-Mei,et al."Modified scalar-tensor-vector gravity theory and the constraint on its parameters".PHYSICAL REVIEW D 79.4(2009):1.