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

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

2007-11-02

arxiv.org/abs/0711.0253v1

W. Jin I. Platais. and M.A.C. Perryman (Cambridge University Press, 2008), PP. 401-402

Astronomy and Astrophysics

Astrophysics

2 pages, presented to IAU Symposium No. 248, A Giant Step: from Milli- to Micro-Arcsecond Astrometry (Shanghai, October 15-19,

Scientific paper

10.1017/S1743921308019674

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 (Global Astrometric Interferometer of Astrophysics), SIMS (The Space Interferometry Mission) and LATOR (Laser Astrometric Test Of Relativity) which aim at astrometry with microarcsecond and nanoarcsecond accuracies and need 2nd post-Newtonian framework and ephemeris to determine the stellar and spacecraft positions.

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