Long range gravity tests and the Pioneer anomaly

Details Long range gravity tests and the Pioneer anomaly Long range gravity tests and the Pioneer anomaly

2006-10-31

arxiv.org/abs/gr-qc/0610160v1

Int.J.Mod.Phys.D16:2091-2105,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

8 pages

Scientific paper

10.1142/S0218271807011656

Experimental tests of gravity performed in the solar system show a good agreement with general relativity. The latter is however challenged by the Pioneer anomaly which might be pointing at some modification of gravity law at ranges of the order of the size of the solar system. As this question could be related to the puzzles of ``dark matter'' or ``dark energy'', it is important to test it with care. There exist metric extensions of general relativity which preserve the well verified equivalence principle while possibly changing the metric solution in the solar system. Such extensions have the capability to preserve compatibility with existing gravity tests while opening free space for the Pioneer anomaly. They constitute arguments for new mission designs and new space technologies as well as for having a new look at data of already performed experiments.

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