Pulsar constraints on screened modified gravity

被引：28

作者：

Brax, Philippe ^{[1
]}

Davis, Anne Christine ^{[2
]}

Sakstein, Jeremy ^{[3
,4
]}

机构：

[1] CEA, Inst Phys Theor, IPhT, CNRS,URA 2306, F-91191 Gif Sur Yvette, France

[2] Univ Cambridge, Ctr Math Sci, DAMTP, Cambridge CB3 0WA, England

[3] Ctr Math Sci, Dept Appl Math & Theoret Phys, Cambridge CB3 0WA, England

[4] Perimeter Inst Theoret Phys, Waterloo, ON N2L 6B9, Canada

来源：

CLASSICAL AND QUANTUM GRAVITY | 2014年 / 31卷 / 22期

关键词：

modified gravity; gravity tests; scalar field models; ACCELERATING UNIVERSE; GENERAL-RELATIVITY; SCALAR THEORIES; TENSOR; TESTS;

D O I：

10.1088/0264-9381/31/22/225001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We calculate the rate of energy loss from compact astrophysical objects due to a scalar field in screened modified gravity models of the chameleon, dilaton and symmetron types. The cosmological evolution of the field results in a time-variation of the scalar charge of screened objects, implying the emission of scalar radiation. Focusing on binary objects, this leads to an additional decay in the orbital period complementing that due to the emission of gravitational waves. Using the Hulse-Taylor binary pulsar, the double pulsar PSR J0737-3039 and the pulsar-white dwarf system PSR J1738 + 033, we find a new observational bound on the time variation of the scalar charge of the Earth in the Milky Way. We then translate this into a new bound on the range of the scalar interaction in the Milky Way. Ultimately, we find that pulsar tests are not competitive with current observational constraints.

引用

页数：21

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