Gravitational radiation from compact binary systems in Einstein-Maxwell-dilaton theories

Julié, Félix-Louis

doi:10.1088/1475-7516/2018/10/033

Cited by 39 publications

(31 citation statements)

References 18 publications

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“…(IV.9)], yield the full EsGB Lagrangian at 3PN order. It will be interesting to extend the effectiveone-body program to this more general class of theories: see [69,70] for similar work in "ordinary" scalar-tensor gravity, and [28,49] for related work in EMD theory.…”

Section: Discussionmentioning

confidence: 99%

“…We improve on that treatment in two ways: (1) we allow for the fact that the BH masses and scalar "charges" are not constant: instead, we consistently skeletonize the BHs following a well-established procedure first introduced by Eardley in scalar-tensor gravity [26], and recently generalized to Einstein-Maxwell-dilaton theory by one of us [27,28]; (2) as a consequence of the skeletonization, we can self-consistently compute higher-order post-Newtonian (PN) terms in the Lagrangian.…”

Section: Introductionmentioning

confidence: 99%

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Post-Newtonian dynamics and black hole thermodynamics in Einstein-scalar-Gauss-Bonnet gravity

Julié

Berti

2019

Phys. Rev. D

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We study the post-Newtonian dynamics of black hole binaries in Einstein-scalar-Gauss-Bonnet gravity theories. To this aim we build static, spherically symmetric black hole solutions at fourth order in the Gauss-Bonnet coupling α. We then "skeletonize" these solutions by reducing them to point particles with scalar field-dependent masses, showing that this procedure amounts to fixing the Wald entropy of the black holes during their slow inspiral. The cosmological value of the scalar field plays a crucial role in the dynamics of the binary. We compute the two-body Lagrangian at first post-Newtonian order and show that no regularization procedure is needed to obtain the Gauss-Bonnet contributions to the fields, which are finite. We illustrate the power of our approach by Padé-resumming the so-called "sensitivities," which measure the coupling of the skeletonized body to the scalar field, for some specific theories of interest. arXiv:1909.05258v1 [gr-qc]

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Post-Newtonian dynamics and black hole thermodynamics in Einstein-scalar-Gauss-Bonnet gravity

Julié

Berti

2019

Phys. Rev. D

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“…Unfortunately, there is still a lack of alternative theories of gravity that are mathematically well-posed, physically viable, and provide sufficiently well-defined alternative predictions for the GW signal emitted by two coalescing compact objects. Recent NR studies have begun to model astrophysically relevant binary black hole mergers in beyond-GR theories [30][31][32][33][34] and numerous advances have been made deriving the analytical equations of motion and gravitational waveforms in such theories [35][36][37][38][39][40][41][42][43][44][45][46][47][48]. However, it is often unknown whether the full theories are well-posed, and a significant amount of work is required before the results can be used in the context of GW data analysis.…”

Section: Introductionmentioning

confidence: 99%

Tests of general relativity with binary black holes from the second LIGO-Virgo gravitational-wave transient catalog

Abbott¹,

Abbott²,

Abraham³

et al. 2021

Phys. Rev. D

512

439

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Gravitational waves enable tests of general relativity in the highly dynamical and strong-field regime. Using events detected by LIGO-Virgo up to 1 October 2019, we evaluate the consistency of the data with predictions from the theory. We first establish that residuals from the best-fit waveform are consistent with detector noise, and that the low-and high-frequency parts of the signals are in agreement. We then consider parametrized modifications to the waveform by varying post-Newtonian and phenomenological coefficients, improving past constraints by factors of ∼2; we also find consistency with Kerr black holes when we specifically target signatures of the spin-induced quadrupole moment. Looking for gravitational-wave dispersion, we tighten constraints on Lorentz-violating coefficients by a factor of ∼2.6 and bound the mass of the graviton to m g ≤ 1.76 × 10 −23 eV=c 2 with 90% credibility. We also analyze the properties of the merger remnants by measuring ringdown frequencies and damping times, constraining fractional deviations away from the Kerr frequency to δf 220 ¼ 0.03 þ0.38 −0.35 for the fundamental quadrupolar mode, and δf 221 ¼ 0.04 þ0.27 −0.32 for the first overtone; additionally, we find no evidence for postmerger echoes. Finally, we determine that our data are consistent with tensorial polarizations through a template-independent method. When possible, we assess the validity of general relativity based on collections of events analyzed jointly. We find no evidence for new physics beyond general relativity, for black hole mimickers, or for any unaccounted systematics.

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“…where f (r ) is given in (12). The exact solutions to the Einstein-Maxwell-dilaton theory based on the latter metric, are reviewed later in Sect.…”

Section: Exact Solutions To the Einstein-maxwell-dilaton Theory Based On Bianchi Type IX Geometry With Two Different Coupling Constants Amentioning

confidence: 99%

“…The relevant solutions can be found in the compactification of M-theory in generalized Freund-Rubin theory [7]. The applications and properties of the Einstein-Maxwell-dilaton theory can be found in different areas such as slowly rotation black holes a e-mail: bardia.fahim@usask.ca b e-mail: masoud.ghezelbash@usask.ca (corresponding author) [8,9], topological charged hairy black holes [10], cosmic censorship [11], gravitational radiation [12] and hyperscaling violation [13]. Moreover, the variation of the standard Einstein-Maxwell-dilaton theory with two extra vector fields, where one field supports the non-trivial topology, and the second field supports states with the finite charge density, was considered in [14].…”

Section: Introductionmentioning

confidence: 99%

New class of exact solutions to Einstein–Maxwell-dilaton theory on four-dimensional Bianchi type IX geometry

Fahim

Ghezelbash

2021

Eur. Phys. J. C

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We construct new classes of cosmological solution to the five dimensional Einstein–Maxwell-dilaton theory, that are non-stationary and almost conformally regular everywhere. The base geometry for the solutions is the four-dimensional Bianchi type IX geometry. In the theory, the dilaton field is coupled to the electromagnetic field and the cosmological constant term, with two different coupling constants. We consider all possible solutions with different values of the coupling constants, where the cosmological constant takes any positive, negative or zero values. In the ansatzes for the metric, dilaton and electromagnetic fields, we consider dependence on time and two spatial directions. We also consider a special case of the Bianchi type IX geometry, in which the geometry reduces to that of Eguchi–Hanson type II geometry and find a more general solution to the theory.

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Gravitational radiation from compact binary systems in Einstein-Maxwell-dilaton theories

Cited by 39 publications

References 18 publications

Post-Newtonian dynamics and black hole thermodynamics in Einstein-scalar-Gauss-Bonnet gravity

Post-Newtonian dynamics and black hole thermodynamics in Einstein-scalar-Gauss-Bonnet gravity

Tests of general relativity with binary black holes from the second LIGO-Virgo gravitational-wave transient catalog

New class of exact solutions to Einstein–Maxwell-dilaton theory on four-dimensional Bianchi type IX geometry

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