Asymptotic safety and field parametrization dependence in the 
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 truncation

Brito, Gustavo P. de; Ohta, Nobuyoshi; Pereira, Antônio D.; Tomaz, A. A.; Yamada, Masatoshi

doi:10.1103/physrevd.98.026027

Cited by 60 publications

(51 citation statements)

References 129 publications

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“…We find f = 234 +11 −12 Hz and τ = 4.0 +1.5 −1.0 ms, which is consistent both with the predicted values from a full Inspiral-Merger-Ringdown (IMR) analysis and with the late time (t start ≥ t merger + 3 ms) unmodelled analyses in Refs. [21,23]. To investigate which mode has the highest probability of matching the recovered unmodelled posterior a posteriori, according to GR predictions, we use the samples for the progenitors masses and spins [20,38,39] and employ them to predict the corresponding frequency and damping time for a set of modes which overlap with the unmodelled posterior.…”

Section: Agnostic Analysismentioning

confidence: 99%

“…Moreover, an accurate determination of the BH ringdown spectrum represents one of the most promising avenues to unveil BH horizon quantum effects, discovering exotic compact objects, hairy BHs or even wormholes [16][17][18]. Several authors proposed methods and offered predictions on the feasibility of what has come to be known as "black hole spectroscopy" [19][20][21]. The improvements gained by coherently combining information from multiple events have also been investigated, see e.g.…”

Section: Introductionmentioning

confidence: 99%

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Observational black hole spectroscopy: A time-domain multimode analysis of GW150914

2019

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The detection of the least damped quasi-normal mode from the remnant of the gravitational wave event GW150914 realised the long sought possibility to observationally study the properties of quasi-stationary black hole spacetimes through gravitational waves. Past literature has extensively explored this possibility and the emerging field has been named "black hole spectroscopy". In this study, we present results regarding the ringdown spectrum of GW150914, obtained by application of Bayesian inference to identify and characterise the ringdown modes. We employ a pure time-domain analysis method which infers from the data the time of transition between the non-linear and quasi-linear regime of the post-merger emission in concert with all other parameters characterising the source. We find that the data provides no evidence for the presence of more than one quasi-normal mode. However, from the central frequency and damping time posteriors alone, no unambiguous identification of a single mode is possible. More in-depth analysis adopting a ringdown model based on results in perturbation theory over the Kerr metric, confirms that the data do not provide enough evidence to discriminate among an l = 2 and the l = 3 subset of modes. Our work provides the first comprehensive agnostic framework to observationally investigate astrophysical black holes' ringdown spectra.

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Section: Agnostic Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Observational black hole spectroscopy: A time-domain multimode analysis of GW150914

2019

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“…An investigation of correlations of this type without form factors in a bi-metric setup has been carried out in [112], and in a Brans-Dicke motivated context in [57,95,104,125]. The monomials (25) and (26) constitute a complete set of form factors at first order in the spacetime curvature.…”

Section: Scalarsmentioning

confidence: 99%

Form factors in asymptotic safety: conceptual ideas and computational toolbox

Knorr

Ripken

Saueressig

2019

Class. Quantum Grav.

109

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Over the last years the Asymptotic Safety program has matured into a serious candidate for a quantum theory of gravity compatible with observations. The rapid technical progress in computing renormalisation group flows for gravity and gravity-matter systems in the non-perturbative regime has put many interesting physical questions within reach. In particular, the construction of the non-perturbative quantum corrections to the propagation of fields on a fluctuating spacetime allows addressing the effective propagation of matter on a quantum spacetime or the possible resolution of spacetime singularities based on first principle computations. In this article, we assemble a technical toolbox for carrying out investigations on this promising research frontier. As a specific example we present results for the momentumdependent two-point function for a scalar field induced by the quantum fluctuations of the underlying geometry in a self-consistent way.

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“…[12] for an overview. When such objects are part of a binary system that undergoes coalescence, anomalous ef-fects associated with them can leave an imprint upon the observed gravitational wave signal, including tidal effects [13,14]; dynamical friction as well as resonant excitations due to dark matter clouds surrounding the objects [15]; violations of the no-hair conjecture [16,17]; and finally through gravitational wave "echoes" that might follow a merger [18][19][20][21].…”

mentioning

confidence: 99%

A morphology-independent search for gravitational wave echoes in data from the first and second observing runs of Advanced LIGO and Advanced Virgo

et al. 2020

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Gravitational wave echoes have been proposed as a smoking-gun signature of exotic compact objects with near-horizon structure. Recently there have been observational claims that echoes are indeed present in stretches of data from Advanced LIGO and Advanced Virgo immediately following gravitational wave signals from presumed binary black hole mergers, as well as a binary neutron star merger. In this paper we deploy a morphology-independent search algorithm for echoes introduced in Tsang et al., Phys. Rev. D 98, 024023 (2018), which (a) is able to accurately reconstruct a possible echoes signal with minimal assumptions about their morphology, and (b) computes Bayesian evidences for the hypotheses that the data contain a signal, an instrumental glitch, or just stationary, Gaussian noise. Here we apply this analysis method to all the significant events in the first Gravitational Wave Transient Catalog (GWTC-1), which comprises the signals from binary black hole and binary neutron star coalescences found during the first and second observing runs of Advanced LIGO and Advanced Virgo. In all cases, the ratios of evidences for signal versus noise and signal versus glitch do not rise above their respective "background distributions" obtained from detector noise, the smallest p-value being 3% (for event GW170823). Hence we find no statistically significant evidence for echoes in GWTC-1.

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Asymptotic safety and field parametrization dependence in the f(R) truncation

Cited by 60 publications

References 129 publications

Observational black hole spectroscopy: A time-domain multimode analysis of GW150914

Observational black hole spectroscopy: A time-domain multimode analysis of GW150914

Form factors in asymptotic safety: conceptual ideas and computational toolbox

A morphology-independent search for gravitational wave echoes in data from the first and second observing runs of Advanced LIGO and Advanced Virgo

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