Numerical relativity
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Tests of General Relativity with GW150914 Open
The LIGO detection of GW150914 provides an unprecedented opportunity to study the two-body motion of a compact-object binary in the large-velocity, highly nonlinear regime, and to witness the final merger of the binary and the excitation o…
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Tests of general relativity with the binary black hole signals from the LIGO-Virgo catalog GWTC-1 Open
The detection of gravitational waves by Advanced LIGO and Advanced Virgo provides an opportunity to test general relativity in a regime that is inaccessible to traditional astronomical observations and laboratory tests. We present four tes…
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Frequency-domain gravitational waves from nonprecessing black-hole binaries. I. New numerical waveforms and anatomy of the signal Open
In this paper we discuss the anatomy of frequency-domain gravitational-wave\nsignals from non-precessing black-hole coalescences with the goal of\nconstructing accurate phenomenological waveform models. We first present new\nnumerical-rela…
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Tests of general relativity with binary black holes from the second LIGO-Virgo gravitational-wave transient catalog Open
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 …
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GW190412: Observation of a binary-black-hole coalescence with asymmetric masses Open
We report the observation of gravitational waves from a binary-black-hole coalescence during the first two weeks of LIGO’s and Virgo’s third observing run. The signal was recorded on April 12, 2019 at 05∶30∶44 UTC with a network signal-to-…
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Improved effective-one-body model of spinning, nonprecessing binary black holes for the era of gravitational-wave astrophysics with advanced detectors Open
We improve the accuracy of the effective-one-body (EOB) waveforms that were employed during the first observing run of Advanced LIGO for binaries of spinning, nonprecessing black holes by calibrating them to a set of 141 numerical-relativi…
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Erratum: Tests of General Relativity with GW150914 [Phys. Rev. Lett. <b>116</b>, 221101 (2016)] Open
This corrects the article DOI: 10.1103/PhysRevLett.116.221101.
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Modeling GW170817 based on numerical relativity and its implications Open
Gravitational-wave observation together with a large number of\nelectromagnetic observations shows that the source of the latest\ngravitational-wave event, GW170817, detected primarily by advanced LIGO, is the\nmerger of a binary neutron s…
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The SXS collaboration catalog of binary black hole simulations Open
Accurate models of gravitational waves from merging black holes are necessary\nfor detectors to observe as many events as possible while extracting the\nmaximum science. Near the time of merger, the gravitational waves from merging\nblack …
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Multipolar effective-one-body waveforms for precessing binary black holes: Construction and validation Open
As gravitational-wave detectors become more sensitive and broaden their frequency bandwidth, we will access a greater variety of signals emitted by compact binary systems, shedding light on their astrophysical origin and environment. A key…
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General Relativity from Scattering Amplitudes Open
Weoutline the program to apply modern quantum field theory methods to calculate observables in classical general relativity through a truncation to classical terms of the multigraviton, two-body, on-shell scattering amplitudes between mass…
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Testing strong-field gravity with tidal Love numbers Open
The tidal Love numbers (TLNs) encode the deformability of a self-gravitating object immersed in a tidal environment and depend significantly both on the object's internal structure and on the dynamics of the gravitational field. An intrigu…
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Enriching the symphony of gravitational waves from binary black holes by tuning higher harmonics Open
For the first time, we construct an inspiral-merger-ringdown waveform model within the effective-one-body formalism for spinning, nonprecessing binary black holes that includes gravitational modes beyond the dominant $(\ell,|m|) = (2,2)$ m…
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Testing General Relativity with Stellar Orbits around the Supermassive Black Hole in Our Galactic Center Open
We demonstrate that short-period stars orbiting around the supermassive black hole in our Galactic center can successfully be used to probe the gravitational theory in a strong regime. We use 19 years of observations of the two best measur…
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Surrogate model of hybridized numerical relativity binary black hole waveforms Open
Numerical relativity (NR) simulations provide the most accurate binary black hole gravitational waveforms, but are prohibitively expensive for applications such as parameter estimation. Surrogate models of NR waveforms have been shown to b…
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Spectroscopy of Kerr Black Holes with Earth- and Space-Based Interferometers Open
We estimate the potential of present and future interferometric gravitational-wave detectors to test the Kerr nature of black holes through "gravitational spectroscopy," i.e., the measurement of multiple quasinormal mode frequencies from t…
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Black Hole Ringdown: The Importance of Overtones Open
It is possible to infer the mass and spin of the remnant black hole from binary black hole mergers by comparing the ringdown gravitational wave signal to results from studies of perturbed Kerr spacetimes. Typically, these studies are based…
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First Higher-Multipole Model of Gravitational Waves from Spinning and Coalescing Black-Hole Binaries Open
Gravitational-wave observations of binary black holes currently rely on theoretical models that predict the dominant multipoles (ℓ=2,|m|=2) of the radiation during inspiral, merger, and ringdown. We introduce a simple method to include the…
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Closed-form tidal approximants for binary neutron star gravitational waveforms constructed from high-resolution numerical relativity simulations Open
We construct closed-form gravitational waveforms (GWs) with tidal effects for the coalescence and merger of binary neutron stars. The method relies on a new set of eccentricity-reduced and high-resolution numerical relativity (NR) simulati…
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Validating the effective-one-body model of spinning, precessing binary black holes against numerical relativity Open
In Ref. [1], the properties of the first gravitational wave detected by LIGO, GW150914, were measured by employing an effective-one-body (EOB) model of precessing binary black holes whose underlying dynamics and waveforms were calibrated t…
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Matter imprints in waveform models for neutron star binaries: Tidal and self-spin effects Open
The combined observation of gravitational and electromagnetic waves from the\ncoalescence of two neutron stars marks the beginning of multi-messenger\nastronomy with gravitational waves (GWs). The development of accurate\ngravitational wav…
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Numerical relativity waveform surrogate model for generically precessing binary black hole mergers Open
A generic, noneccentric binary black hole (BBH) system emits gravitational waves (GWs) that are completely described by seven intrinsic parameters: the black hole spin vectors and the ratio of their masses. Simulating a BBH coalescence by …
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Rotating stars in relativity Open
Rotating relativistic stars have been studied extensively in recent years, both theoretically and observationally, because of the information they might yield about the equation of state of matter at extremely high densities and because th…
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Georgia tech catalog of gravitational waveforms Open
This paper introduces a catalog of gravitational waveforms from the bank of\nsimulations by the numerical relativity effort at Georgia Tech. Currently, the\ncatalog consists of 452 distinct waveforms from more than 600 binary black hole\ns…
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Hierarchical data-driven approach to fitting numerical relativity data for nonprecessing binary black holes with an application to final spin and radiated energy Open
Numerical relativity is an essential tool in studying the coalescence of binary black holes (BBHs). It is still computationally prohibitive to cover the BBH parameter space exhaustively, making phenomenological fitting formulas for BBH wav…
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General relativistic magnetohydrodynamic simulations of binary neutron star mergers forming a long-lived neutron star Open
Merging binary neutron stars (BNSs) represent the ultimate targets for\nmultimessenger astronomy, being among the most promising sources of\ngravitational waves (GWs), and, at the same time, likely accompanied by a\nvariety of electromagne…
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Waveform model for an eccentric binary black hole based on the effective-one-body-numerical-relativity formalism Open
Binary black hole systems are among the most important sources for\ngravitational wave detection. And also they are good objects for theoretical\nresearch for general relativity. Gravitational waveform template is important\nto data analys…
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Numerical methods for finding stationary gravitational solutions Open
The wide applications of higher dimensional gravity and gauge/gravity duality have fuelled the search for new stationary solutions of the Einstein equation (possibly coupled to matter). In this topical review, we explain the mathematical f…
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Fundamental Physics Implications for Higher-Curvature Theories from Binary Black Hole Signals in the LIGO-Virgo Catalog GWTC-1 Open
Gravitational-wave astronomy offers not only new vistas into the realm of astrophysics, but it also opens an avenue for probing, for the first time, general relativity in its strong-field, nonlinear, and dynamical regime, where the theory'…
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Directly comparing GW150914 with numerical solutions of Einstein’s equations for binary black hole coalescence Open
We compare GW150914 directly to simulations of coalescing binary black holes in full general relativity, including several performed specifically to reproduce this event. Our calculations go beyond existing semianalytic models, because for…