Using a coordinate-independent impact parameter in the post-post-Newtonian light deflection formulas

Details Using a coordinate-independent impact parameter in the post-post-Newtonian light deflection formulas Using a coordinate-independent impact parameter in the post-post-Newtonian light deflection formulas

2009-11-11

arxiv.org/abs/0911.2170v2

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

7 pages, no figures, report for astrometric mission Gaia

Scientific paper

In [2] we have seen that among the post-post-Newtonian terms in the light deflection formulas there are "enhanced" ones that may become much larger than the other post-post-Newtonian terms. It is demonstrated here that these "enhanced" terms result from an inadequate choice of the impact parameter. Introducing another impact parameter, that can be considered as coordinate-independent, we demonstrate that all "enhanced" terms disappear from the formulas.

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