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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, Yi2,3,4
2016-02-04
Source PublicationPHYSICAL REVIEW D
Volume93Issue:4
AbstractIn 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 HeadingsScience & Technology ; Physical Sciences
DOI10.1103/PhysRevD.93.044013
WOS KeywordINVERSE-SQUARE LAW ; UPPER LIMITS ; RELATIVITY ; CONSTRAINTS ; SUPERNOVAE ; CONSTANT ; BOUNDS ; WAVES
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
WOS IDWOS:000369436800013
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16129
Collection历算和天文参考系研究团组
Affiliation1.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
Recommended Citation
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).
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