Solar System tests of a scalar-tensor gravity with a general potential: Insensitivity of light deflection and Cassini tracking

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	Solar System tests of a scalar-tensor gravity with a general potential: Insensitivity of light deflection and Cassini tracking
	Deng, Xue-Mei1 ; Xie, Yi 2,3,4
刊名	PHYSICAL REVIEW D
	2016-02-04
卷号	93 期号:4
英文摘要	In the work of Hohmann et al. [Phys. Rev. D 88, 084054 (2013)], the authors worked out the parametrized post-Newtonian (PPN) parameters gamma and beta of a scalar-tensor theory with an arbitrary coupling function and a generic potential, and they found that these two PPN parameters depend on the radial distance r from the Sun, gamma(r) and beta(r). Based on the assumption that measurements on the PPN parameters can be characterized by the shortest distance to the Sun, the authors obtained their best constraints on the model parameters of the scalar-tenor theory by light deflection observation and the Cassini tracking experiment. However, as the authors stated, this approach might not be rigorous. In the present work, we physically model astronomical observations and physical experiments by calculating the null and timelike geodesics in the scalar-tensor theory. We show that, contrary to the results in the previous work, the light deflection and the Cassini tracking cannot distinguish the scalar-tensor theory from general relativity. We also investigate the additional advances in perihelia caused by the largest correction of the scalar field on the Newtonian potential. Since this correction has a Yukawa-like form, we obtain very much improved lower bounds on the model parameters by using current upper limits on the Yukawa parameters.
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]	INVERSE-SQUARE LAW ; UPPER LIMITS ; RELATIVITY ; CONSTRAINTS ; SUPERNOVAE ; CONSTANT ; BOUNDS ; WAVES
收录类别	SCI
语种	英语
WOS记录号	WOS:000369436800013
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/16129]
专题	紫金山天文台_历算和天文参考系研究团组
作者单位	1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 2.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China 3.Shanghai Key Lab Space Nav & Posit Tech, Shanghai 200030, Peoples R China 4.Nanjing Univ, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing 210093, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Deng, Xue-Mei,Xie, Yi. Solar System tests of a scalar-tensor gravity with a general potential: Insensitivity of light deflection and Cassini tracking[J]. PHYSICAL REVIEW D,2016,93(4).
APA	Deng, Xue-Mei,&Xie, Yi.(2016).Solar System tests of a scalar-tensor gravity with a general potential: Insensitivity of light deflection and Cassini tracking.PHYSICAL REVIEW D,93(4).
MLA	Deng, Xue-Mei,et al."Solar System tests of a scalar-tensor gravity with a general potential: Insensitivity of light deflection and Cassini tracking".PHYSICAL REVIEW D 93.4(2016).