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Light deflection in the second post-Newtonian approximation of scalar-tensor theory of gravity

Published online by Cambridge University Press:  01 October 2007

P. Dong  and
W. T. Ni
P. Dong
Affiliation:
Center for Gravitation and Cosmology, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, 210008, China emails: dongpeng@pmo.ac.cn, wtni@pmo.ac.cn Graduate University of the Chinese Academy of Sciences, Beijing, 100049, China
W. T. Ni
Affiliation:
Center for Gravitation and Cosmology, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, 210008, China emails: dongpeng@pmo.ac.cn, wtni@pmo.ac.cn
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Abstract

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In this paper, we use the metric coefficients and the equation of motion in the 2nd post-Newtonian approximation in scalar-tensor theory including intermediate range gravity to derive the deflection of light and compare it with previous works. These results will be useful for precision astrometry missions like Gaia, SIM, and LATOR (Laser Astrometric Test Of Relativity) which aim at astrometry with micro-arcsecond and nano-arcsecond accuracies and a need for the 2nd post-Newtonian framework and ephemeris to determine the stellar and spacecraft positions.

Keywords

astrometryreference systemstime
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S248: A Giant Step: from Milli- to Micro-arcsecond Astrometry , October 2007 , pp. 401 - 402
Copyright
Copyright © International Astronomical Union 2008

References

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