Deng Xuemei
Source Publicationsciencechinaphysicsmechanicsastronomy
AbstractSearching for an intermediate-range force has been considerable interests in gravity experiments.In this paper,aiming at a scalartensor theory with an intermediate-range force,we have derived the metric and equations of motion (EOMs) in the first post-Newtonian (1PN) approximation for general matter without specific equation of state and N point masses firstly.Subsequently,the secular periastron precession ω of binary pulsars in harmonic coordinates is given.After that,ω of four binary pulsars data (PSR B1913+16,PSR B1534+12,PSR J0737-3039 and PSR B2127+11C) have been used to constrain the intermediate-range force,namely,the parameters α and λ.α and λ respectively represent the strength of the intermediate-range force coupling and its length scale.The limits from four binary pulsars data are respectively λ=(4.95±0.02)×10~8 m and α=(2.30±0.01)×10~(-8) if β=1,where β is a parameter like standard parametrized post-Newtonian parameter β_(PPN).When three degrees of freedom (α,λ and β-bar≡β 1) in 1σ confidence level are considered,it yields α=(4.21±0.01)×10~(-4),λ=(4.51±0.01)×10~7 m and β-bar=(3.30±0.01)×10~(-3).Through our research on the scalar-tensor theory with the intermediate-range force,it shows that the parameter α is directly related to the parameter γ (α=(1 γ)/(1+ γ)).Thus,this presents the constraints on 1 γ by binary pulsars which is about 10~(-4) for three degrees of freedom.
Document Type期刊论文
First Author Affilication中国科学院紫金山天文台
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Deng Xuemei. constraintsonascalartensortheorywithanintermediaterangeforcebybinarypulsars[J]. sciencechinaphysicsmechanicsastronomy,2011,54(11):2071.
APA Deng Xuemei.(2011).constraintsonascalartensortheorywithanintermediaterangeforcebybinarypulsars.sciencechinaphysicsmechanicsastronomy,54(11),2071.
MLA Deng Xuemei."constraintsonascalartensortheorywithanintermediaterangeforcebybinarypulsars".sciencechinaphysicsmechanicsastronomy 54.11(2011):2071.
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