# Unveiling the Galileon in a three-body system: scalar and gravitational wave production

@article{Brax2020UnveilingTG,
title={Unveiling the Galileon in a three-body system: scalar and gravitational wave production},
author={Philippe Brax and Lavinia Heisenberg and Adrien Kuntz},
journal={Journal of Cosmology and Astroparticle Physics},
year={2020}
}
• Published 28 February 2020
• Physics
• Journal of Cosmology and Astroparticle Physics
We consider the prospect of detecting cubic Galileons through their imprint on gravitational wave signals from a triple system. Namely, we consider a massive Black Hole (BH) surrounded by a binary system of two smaller BHs. We assume that the three BHs acquire a conformal coupling to the scalar field whose origin could be due to cosmology or to the galactic environment. In this case, the massive BH has a Vainshtein radius which englobes the smaller ones and suppresses the scalar effects on the…
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## References

SHOWING 1-10 OF 70 REFERENCES
• Physics
• 2013
We calculate the power emitted in scalar modes for a binary systems, including binary pulsars, with a conformal coupling to the most general Galileon effective field theory by considering
Scalar gravitational radiation from binaries: Vainshtein mechanism in time-dependent systems
• Physics
Classical and Quantum Gravity
• 2018
We develop a full four-dimensional numerical code to study scalar gravitational radiation emitted from binary systems and probe the Vainshtein mechanism in situations that break the static and
Galileon forces in the Solar System
• Physics
• 2013
We consider the challenging problem of obtaining an analytic understanding of realistic astrophysical dynamics in the presence of a Vainshtein screened fth force arising from infrared modications of
Cosmic acceleration and the helicity-0 graviton
• Physics
• 2011
We explore cosmology in the decoupling limit of a nonlinear covariant extension of Fierz-Pauli massive gravity obtained recently in arXiv:1007.0443. In this limit the theory is a scalar-tensor model
Galileon Cosmology
• Physics
• 2009
We study the cosmology of a galileon scalar-tensor theory, obtained by covariantizing the decoupling lagrangian of the Dvali-Gabadadze-Poratti (DGP) model. Despite being local in 3+1 dimensions, the
The Speed of Galileon Gravity
• Physics
• 2015
We analyse the speed of gravitational waves in coupled Galileon models with an equation of state $\omega_\phi=-1$ now and a ghost-free Minkowski limit. We find that the gravitational waves propagate
Galileon as a local modification of gravity
• Physics
• 2009
In the Dvali-Gabadadze-Porrati (DGP) model, the "self-accelerating" solution is plagued by a ghost instability, which makes the solution untenable. This fact, as well as all interesting departures
Two-body potential of Vainshtein screened theories
Adding a light scalar degree of freedom to General Relativity often induces a fifth force whose magnitude is strongly constrained by laboratory experiments and solar system tests. The Vainshtein
Effective field theory for gravitational radiation in scalar-tensor gravity
• Physics
Journal of Cosmology and Astroparticle Physics
• 2019
A light scalar degree of freedom, as the one possibly responsible for the accelerated expansion of the Universe, could leave observable traces in the inspiral gravitational wave signal of binary
Cosmology of the Galileon from Massive Gravity
• Physics
• 2011
We covariantize the decoupling limit of massive gravity proposed in arXiv:1011.1232 and study the cosmology of this theory as a proxy, which embodies key features of the fully non-linear covariant