Gravitational radiation from compact binary systems in the massive Brans-Dicke theory of gravity

Alsing J.; Berti E.; Will C.M.Zaglauer H.

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Gravitational radiation from compact binary systems in the massive Brans-Dicke theory of gravity

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We derive the equations of motion, the periastron shift, and the gravitational radiation damping for quasicircular compact binaries in a massive variant of the Brans-Dicke theory of gravity. We also study the Shapiro time delay and the Nordtvedt effect in this theory. By comparing with recent observational data, we put bounds on the two parameters of the theory: the Brans-Dicke coupling parameter ω _(BD) and the scalar mass m _s. We find that the most stringent bounds come from Cassini measurements of the Shapiro time delay in the Solar System that yield a lower bound ω BD>40000 for scalar masses m _s5×1010km, to 95 confidence. In comparison, observations of the Nordtvedt effect using lunar laser ranging experiments yield ω _(BD)>1000 for m _s1250 for m _s1.2×1011km). A first estimate suggests that bounds comparable to the Shapiro time delay may come from observations of radiation damping in the eccentric white dwarf-neutron star binary PSR J1141-6545, but a quantitative prediction requires the extension of our work to eccentric orbits.

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《Physical review, D. Particles, fields, gravitation, and cosmology》 |2012年第6期|064041-1-064041-20|共20页
作者
Alsing J.; Berti E.; Will C.M.Zaglauer H.;
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Department of Physics and Astronomy, University of Mississippi, University, MS 38677, United States;

McDonnell Center for the Space Sciences, Department of Physics, Washington University, St. Louis, MO 63130, United States;

Astrium GmbH, 88039 Friedrichshafen, GermanyDepartment of Physics, University of Oxford, Keble Road, Oxford OX1 3RH, United Kingdom;

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中图分类粒子物理学;
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Gravitational radiation from compact binary systems in the massive Brans-Dicke theory of gravity

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