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19912026
Showing 2018 · gr-qcShow all

21 papers · 2 filters

gr-qc2018★ 61 cited

Gravitational waveforms from SpEC simulations : neutron star-neutron star and low-mass black hole-neutron star binaries

Francois Foucart, Matthew D. Duez, Tanja Hinderer +9

Gravitational waveforms from numerical simulations are a critical tool to test and analytically calibrate the waveform models used to study the properties of merging compact object…

gr-qc2018★ 285 cited

Surrogate model of hybridized numerical relativity binary black hole waveforms

Vijay Varma, Scott E. Field, Mark A. Scheel +3

Numerical relativity (NR) simulations provide the most accurate binary black hole gravitational waveforms, but are prohibitively expensive for applications such as parameter estima…

gr-qc2018★ 632 cited

Tests of General Relativity with GW170817

The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1145

The recent discovery by Advanced LIGO and Advanced Virgo of a gravitational wave signal from a binary neutron star inspiral has enabled tests of general relativity (GR) with this n…

gr-qc2018★ 24 cited

Numerical black hole initial data and shadows in dynamical Chern-Simons gravity

Maria Okounkova, Mark A. Scheel, Saul A. Teukolsky

We present a scheme for generating first-order metric perturbation initial data for an arbitrary background and source. We then apply this scheme to derive metric perturbations in…

gr-qc2018★ 2 cited

Constraining Violations of the Weak Equivalence Principle in the Dark Sector

Sina Bahrami

The effective field theory of dark energy is generalized to incorporate dark matter, which is modelled using a complex scalar field with a global symmetry. The dark matter m…

gr-qc2018★ 136 cited

Search for gravitational waves from a long-lived remnant of the binary neutron star merger GW170817

The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1138

One unanswered question about the binary neutron star coalescence GW170817 is the nature of its post-merger remnant. A previous search for post-merger gravitational waves targeted…

gr-qc2018★ 12 cited

Systematic effects from black hole-neutron star waveform model uncertainties on the neutron star equation of state

Kabir Chakravarti, Anuradha Gupta, Sukanta Bose +12

We identify various contributors of systematic effects in the measurement of the neutron star (NS) tidal deformability and quantify their magnitude for several types of neutron sta…

gr-qc2018★ 18 cited

Gravitational backreaction on a cosmic string: Formalism

David F. Chernoff, Éanna É. Flanagan, Barry Wardell

We develop a method for computing the linearized gravitational backreaction for Nambu-Goto strings using a fully covariant formalism. We work with equations of motion expressed in…

gr-qc2018★ 43 cited

Constraining the parameters of GW150914 & GW170104 with numerical relativity surrogates

Prayush Kumar, Jonathan Blackman, Scott E. Field +7

Gravitational-wave detectors have begun to observe coalescences of heavy black holes at a consistent pace for the past few years. Accurate models of gravitational waveforms are ess…

gr-qc2018★ 32 cited

Conservation of asymptotic charges from past to future null infinity: Maxwell fields

Kartik Prabhu

On any asymptotically-flat spacetime, we show that the asymptotic symmetries and charges of Maxwell fields on past null infinity can be related to those on future null infinity as…

gr-qc2018★ 17 cited

Canonical Energy and Hertz Potentials for Perturbations of Schwarzschild Spacetime

Kartik Prabhu, Robert M. Wald

Canonical energy is a valuable tool for analyzing the linear stability of black hole spacetimes; positivity of canonical energy for all perturbations implies mode stability, wherea…

gr-qc2018★ 2.4k cited

GW170817: Measurements of Neutron Star Radii and Equation of State

The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1149

On 17 August 2017, the LIGO and Virgo observatories made the first direct detection of gravitational waves from the coalescence of a neutron star binary system. The detection of th…

gr-qc2018★ 1.3k cited

Properties of the binary neutron star merger GW170817

The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1148

On August 17, 2017, the Advanced LIGO and Advanced Virgo gravitational-wave detectors observed a low-mass compact binary inspiral. The initial sky localization of the source of the…

gr-qc2018★ 45 cited

Black hole scalar charge from a topological horizon integral in Einstein-dilaton-Gauss-Bonnet gravity

Kartik Prabhu, Leo C. Stein

In theories of gravity that include a scalar field, a compact object's scalar charge is a crucial quantity since it controls dipole radiation, which can be strongly constrained by…

gr-qc2018★ 27 cited

Black hole-neutron star mergers using a survey of finite-temperature equations of state

Wyatt Brege, Matthew D. Duez, Francois Foucart +7

Each of the potential signals from a black hole-neutron star merger should contain an imprint of the neutron star equation of state: gravitational waves via its effect on tidal dis…

gr-qc2018★ 12 cited

Foundations of the self-force problem in arbitrary dimensions

Abraham I. Harte, Peter Taylor, Éanna É. Flanagan

The self-force problem---which asks how self-interaction affects a body's motion---has been poorly studied for spacetime dimensions . We remedy this for all by…

gr-qc2018★ 218 cited

Matter imprints in waveform models for neutron star binaries: tidal and self-spin effects

Tim Dietrich, Sebastian Khan, Reetika Dudi +16

The combined observation of gravitational and electromagnetic waves from the coalescence of two neutron stars marks the beginning of multi-messenger astronomy with gravitational wa…

gr-qc2018★ 24 cited

Measuring the properties of nearly extremal black holes with gravitational waves

Katerina Chatziioannou, Geoffrey Lovelace, Michael Boyle +7

Characterizing the properties of black holes is one of the most important science objectives for gravitational-wave observations. Astrophysical evidence suggests that black holes t…

gr-qc2018★ 25 cited

General-relativistic neutron star evolutions with the discontinuous Galerkin method

François Hébert, Lawrence E. Kidder, Saul A. Teukolsky

Simulations of relativistic hydrodynamics often need both high accuracy and robust shock-handling properties. The discontinuous Galerkin method combines these features --- a high o…

gr-qc2018★ 20 cited

Detection and characterization of spin-orbit resonances in the advanced gravitational wave detectors era

Chaitanya Afle, Anuradha Gupta, Bhooshan Gadre +12

In this paper, we test the performance of templates in detection and characterization of Spin-orbit resonant (SOR) binaries. We use precessing SEOBNRv3 waveforms as well as {\it fo…

gr-qc2018★ 18 cited

Critical behavior in 3-d gravitational collapse of massless scalar fields

Nils Deppe, Lawrence E. Kidder, Mark A. Scheel +1

We present results from the first study of critical behavior in 3-d gravitational collapse. The source of the gravitational field is a massless scalar field. This is a well-studied…