Testing MOND/TEVES with LISA Pathfinder

Details Testing MOND/TEVES with LISA Pathfinder Testing MOND/TEVES with LISA Pathfinder

2010-01-08

arxiv.org/abs/1001.1303v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Twin paper to arXiv:0912.0710

Scientific paper

We suggest that LISA Pathfinder could be used to subject TEVES, and in particular the non-relativistic MOND phenomenology it incorporates, to a direct, controlled experimental test, in just a few years' time. The basic concept is to fly LISA Pathfinder through the region around the Sun-Earth saddle point, following its nominal mission, in order to look for anomalous gravity gradients. We examine various strategies to reach the saddle point, and conclude that the preferred strategy, resulting in relatively short transfer times of order one year, probably involves a lunar fly-by. We present robust estimates of the MOND gravity gradients that LISA Pathfinder should be exposed to, and conclude that if the gradiometer on-board the spacecraft achieves its nominal performance, these gradients will not just be detected, but measured and characterised in some detail, should they exist. Conversely, given the large predicted signal based on standard assumptions, a null result would most likely spell the end of TEVES/MOND.

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