Constraints on Einstein-dilation-Gauss-Bonnet gravity from black hole-neutron star gravitational wave events

Lyu, Zhenwei; Jiang, Nan; Yagi, Kent

doi:10.1103/physrevd.105.064001

Cited by 59 publications

(66 citation statements)

References 82 publications

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“…Instead, the higher PN order terms improve the bounds on the ssGB coupling parameter, but only by about a factor of 3. These results are consistent with a very recent analysis of ssGB theory with the same higher PN order model we use here on real aLIGO/Virgo data [74]. Observe that, for this choice of v eval , the leading PN order term is larger than the next-to-leading order one, which in turn is larger than the next-to-next-to-leading order, except at η ∼ 0.19, where the 1PN term vanishes identically.…”

Section: Discussionsupporting

confidence: 93%

Are Parametrized Tests of General Relativity with Gravitational Waves Robust to Unknown Higher Post-Newtonian Order Effects?

Perkins,

Yunes

2022

Preprint

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Gravitational wave observations have great potential to reveal new information about the fundamental nature of gravity, but extracting that information can be difficult. One popular technique is the parametrized inspiral test of general relativity (a realization of the parametrized post-Einsteinian framework), where the gravitational waveform, as calculated in Einstein's theory as a series expansion in the orbital velocity, is parametrically deformed at a given set of orders in velocity. However, most current approaches usually only analyze the data while considering a single, specific modification at a time. Are then constraints placed with a single modification robust to our ignorance of higher post-Newtonian order corrections? We show here that for a wide class of theories, specifically those that admit a post-Newtonian expansion, single-parameter tests are indeed robust. In particular, through a series of full Bayesian parameter estimation studies on several different sets of synthetic data, we show that single-parameter constraints are not degraded but rather are improved by the inclusion of multiple parameters, provided one includes information about the mathematical structure of the series. We then exemplify this with a specific theory of gravity, shift-symmetric scalar Gauss-Bonnet theory, where the waveform has been calculated to higher post-Newtonian orders than leading. We show that the inclusion of these higher order terms strengthens single-parameter constraints, instead of weakening them, and that the strengthening is very mild. This analysis therefore provides strong evidence that single-parameter post-Einsteinian tests of general relativity are robust to ignorance of high post-Newtonian order terms in the general relativistic deformations.

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Section: Discussionsupporting

confidence: 93%

Are Parametrized Tests of General Relativity with Gravitational Waves Robust to Unknown Higher Post-Newtonian Order Effects?

Perkins,

Yunes

2022

Preprint

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“…Such emission of dipole or quadrupole radiation accelerates the inspiral, and thus affect the GW phase at −1PN and 0PN respectively, as shown in shift-symmetric theories [34][35][36][37][38][39]. These effects in the inspiral are observable and can thus be constrained with current ground-based [8,[22][23][24][25] and future detectors [118,119] within the parameterized post-Einsteinian framework [120][121][122][123], provided the binary is of sufficiently low mass such that enough of the inspiral is observed [119]. In fact, a constraint of this type was recently obtained using the GW190814 event [124] in [21].…”

Section: Discussionmentioning

confidence: 96%

“…The detection of gravitational waves (GW) produced by coalescing compact binaries by the LIGO-Virgo-Kagra Collaboration [1-3] have opened a new avenue to test general relativity (GR) in its strong-field, nonlinear regime [4][5][6][7][8]. In fact, the first three catalogs of observations have already been used to perform several null tests of GR [8][9][10][11][12][13][14][15][16][17], as well as theory-specific tests [18][19][20][21][22][23][24][25][26]. The latter have placed constraints on quadratic gravity theories [21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

“…In fact, the first three catalogs of observations have already been used to perform several null tests of GR [8][9][10][11][12][13][14][15][16][17], as well as theory-specific tests [18][19][20][21][22][23][24][25][26]. The latter have placed constraints on quadratic gravity theories [21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

“…More specifically, if the functional form of the coupling always has a non-vanishing first derivative, such as for a linear or exponential coupling, BHs are known to invariably have scalar hair [53][54][55][56][57][58][59][60][61][62][63][64][65][66][67]. Hence, the observation of GWs from BH binaries and mixed neutron star (NS)-BH binaries have allowed us to constrain the length scale at which the scalar-field-GB interaction becomes relevant to less than approximately one kilometer [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

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Spin-induced dynamical scalarization, de-scalarization and stealthness in scalar-Gauss-Bonnet gravity during black hole coalescence

Elley,

Silva,

Witek

et al. 2022

Preprint

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Particular couplings between a scalar field and the Gauss-Bonnet invariant lead to spontaneous scalarization of black holes. Here we continue our work on simulating this phenomenon in the context of binary black hole systems. We consider a negative coupling for which the black-hole spin plays a major role in the scalarization process. We find two main phenomena: (i) dynamical descalarization, in which initially scalarized black holes form an unscalarized remnant, and (ii) dynamical scalarization, whereby the late merger of initially unscalarized black holes can cause scalar hair to grow. An important consequence of the latter case is that modifications to the gravitational waveform due to the scalar field may only occur post-merger, as its presence is hidden during the entirety of the inspiral. However, with a sufficiently strong coupling, we find that scalarization can occur before the remnant has even formed. We close with a discussion of observational implications for gravitational-wave tests of general relativity.

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Neutron Stars as Extreme Gravity Probes

Silva

2024

Recent Progress on Gravity Tests

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Constraints on Einstein-dilation-Gauss-Bonnet gravity from black hole-neutron star gravitational wave events

Cited by 59 publications

References 82 publications

Are Parametrized Tests of General Relativity with Gravitational Waves Robust to Unknown Higher Post-Newtonian Order Effects?

Are Parametrized Tests of General Relativity with Gravitational Waves Robust to Unknown Higher Post-Newtonian Order Effects?

Spin-induced dynamical scalarization, de-scalarization and stealthness in scalar-Gauss-Bonnet gravity during black hole coalescence

Neutron Stars as Extreme Gravity Probes

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