Testing Modified Newtonian Dynamics with LISA Pathfinder

被引：11

作者：

Trenkel, Christian ^{[1
]}

Kemble, Steve ^{[1
]}

Bevis, Neil ^{[2
]}

Magueijo, Joao ^{[2
]}

机构：

[1] Astrium Ltd, Stevenage SG1 2AS, Herts, England

[2] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BZ, England

来源：

ADVANCES IN SPACE RESEARCH | 2012年 / 50卷 / 11期

关键词：

Experimental gravitation; Fundamental physics in space; Modified Newtonian Dynamics; LISA Pathfinder; Dark Matter;

D O I：

10.1016/j.asr.2012.07.024

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

We suggest that LISA Pathfinder, a technology demonstrator for the future gravitational wave observatory LISA, could be used to carry out a direct experimental test of Modified Newtonian Dynamics (MOND). The LISA Pathfinder spacecraft is currently being built and the launch date is just a few years away. No modifications of the spacecraft are required, nor any interference with its nominal mission. The basic concept is to fly LISA Pathfinder through the region around the Sun-Earth saddle point, in an extended mission phase, once the original mission goals are achieved. We examine various strategies to reach the saddle point, and find that the preferred strategy, yielding relatively short transfer times of just over I year, probably involves a lunar fly-by. LISA Pathfinder will be able to probe the intermediate MOND regime, i.e. the transition between deep MOND and Newtonian gravity. We present robust estimates of the anomalous gravity gradients that LISA Pathfinder should be exposed to, based on MONDian effects as derived from the Tensor-Vector-Scalar (TeVeS) theory. The spacecraft speed and spatial scale of the MOND signal combine in a way that the spectral signature of the signal falls precisely into LISA Pathfinder's measurement bandwidth. We find that if the gravity gradiometer on-board the spacecraft achieves its currently predicted sensitivity, these anomalous gradients could not just be detected, but measured in some detail. (C) 2012 COSPAR. Published by Elsevier Ltd. All rights reserved.

引用

页码：1570 / 1580

页数：11

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