The effect of f(T) gravity on an interplanetary clock and its time transfer link  

作　　者：Xue-Mei Deng Yi Xie 

机构地区：[1]Purple Mountain Observatory, Chinese Academy of Sciences [2]Key Laboratory of Modern Astronomy and Astrophysics,Nanjing University, Ministry of Education [3]School of Astronomy & Space Science, Nanjing University

出　　处：《Research in Astronomy and Astrophysics》2013年第10期1225-1230,共6页天文和天体物理学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China (Grant No. 11103010);funded by the Natural Science Foundation of China (Grant No. 11103085);the Fundamental Research Program of Jiangsu Province of China (Grant No. BK20131461;Grant No. BK2011553);the Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20110091120003);the Fundamental Research Funds for the Central Universities (No. 1107020116)

摘　　要：As an extension of the＂teleparallel＂equivalent of general relativity,f（T）gravity is proposed to explain some puzzling cosmological behaviors,such as accelerating expansion of the Universe.Given the fact that modified gravity also has impacts on the Solar System,we might test it during future interplanetary missions with ultrastable clocks.In this work,we investigate the effects of f（T）gravity on the dynamics of the clock and its time transfer link.Under these influences,theΛ-term and theα-term of f（T）gravity play important roles.Here,Λis the cosmological constant andαrepresents a model parameter in f（T）gravity that determines the divergence from teleparallel gravity at the first order approximation.We find that the signal of f（T）gravity in the time transfer is much more difficult to detect with the current state of development for clocks than those effects on dynamics of an interplanetary spacecraft with a bounded orbit with parameters 0.5 au≤a≤5.5 au and 0≤e≤0.1.As an extension of the＂teleparallel＂equivalent of general relativity,f（T）gravity is proposed to explain some puzzling cosmological behaviors,such as accelerating expansion of the Universe.Given the fact that modified gravity also has impacts on the Solar System,we might test it during future interplanetary missions with ultrastable clocks.In this work,we investigate the effects of f（T）gravity on the dynamics of the clock and its time transfer link.Under these influences,theΛ-term and theα-term of f（T）gravity play important roles.Here,Λis the cosmological constant andαrepresents a model parameter in f（T）gravity that determines the divergence from teleparallel gravity at the first order approximation.We find that the signal of f（T）gravity in the time transfer is much more difficult to detect with the current state of development for clocks than those effects on dynamics of an interplanetary spacecraft with a bounded orbit with parameters 0.5 au≤a≤5.5 au and 0≤e≤0.1.

关 键 词：gravitation celestial mechanics space vehicles：clock time 

分 类 号：P173[天文地球—天文学]