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Improved gravitational-wave constraints on higher-order curvature theories of gravity

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arxiv 2104.11189 v2 pith:4AZV5P5P submitted 2021-04-22 gr-qc

Scott E. Perkins , Remya Nair , Hector O. Silva , Nicolas Yunes This is my paper · ORCID
classification gr-qc
keywords gravitygeneralmodificationsrelativitychern-simonscompactconstraintsdynamical
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abstract

Gravitational wave observations of compact binaries allow us to test general relativity (and modifications thereof) in the strong and highly-dynamical field regime of gravity. Here we confront two extensions to general relativity, dynamical Chern-Simons and Einstein-dilaton-Gauss-Bonnet theories, against the gravitational wave sources from the GWTC-1 and GWTC-2 catalogs by the LIGO-Virgo Collaboration. By stacking the posterior of individual events, we strengthen the constraint on the square root of the coupling parameter in Einstein-dilaton-Gauss-Bonnet gravity to $\sqrt{\alpha_{\rm \tiny EdGB}} < 1.7$ km, but we are unable to place meaningful constraints on dynamical Chern-Simons gravity. Importantly, we also show that our bounds are robust to (i) the choice of general-relativity base waveform model, upon which we add modifications, (ii) unknown higher post-Newtonian order terms in the modifications to general relativity, (iii) the small-coupling approximation, and (iv) uncertainties on the nature of the constituent compact objects.

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Cited by 11 Pith papers

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    Spectral methods construct leading-order spinning black-hole spacetimes with massive scalar hair for spin a≤0.8 and scalar mass µ≤0.2/M.

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    Scalar radiation from an EMRI in an ultralight scalar cloud is computed semi-analytically, showing dipole clouds decelerate and quadrupole clouds accelerate the inspiral, with up to about 100 rad dephasing after 18 months.

  9. Signatures of asymmetry: Gravitational wave memory and the parity violation

    gr-qc 2025-05 conditional novelty 6.0 of 10

    This paper derives that the integrated cosmological memory of gravitational waves in Chern-Simons gravity yields a polarization-dependent difference that could, for optimistic parameters, be testable by next-generatio...

  10. On-shell approach to scalar hair in spinning binaries

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    Scalar hair on spinning compact objects is described by a conformal coupling of matter to a massless scalar, yielding matching waveforms and energy loss formulas for scalar-tensor gravity binaries.

  11. Beyond general relativity: gravitational waves in non-minimally coupled theories

    gr-qc 2025-10 conditional novelty 5.0 of 10

    A generalized propagation parameterization for gravitational-wave strains is extended to O(H²) and O(H′), then mapped to Kalb-Ramond, axion-dilaton–Chern-Simons–Gauss-Bonnet, and U(1) dark-photon models.

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