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Showing 2019 · gr-qcShow all

38 papers · 2 filters

gr-qc2019★ 81 cited

Weak Field Limit and Gravitational Waves in Teleparallel Gravity

Salvatore Capozziello, Maurizio Capriolo, Loredana Caso

We derive the gravitational waves for gravity, an extension of teleparallel gravity containing the torsion scalar and the boundary term , and demonstrat…

gr-qc2019★ 564 cited

Open data from the first and second observing runs of Advanced LIGO and Advanced Virgo

The LIGO Scientific Collaboration, the Virgo Collaboration, R. Abbott +1245

Advanced LIGO and Advanced Virgo are actively monitoring the sky and collecting gravitational-wave strain data with sufficient sensitivity to detect signals routinely. In this pape…

gr-qc2019★ 1 cited

New solutions of the Ermakov-Pinney equation in curved space-time

Donato Bini, Giampiero Esposito

An Ermakov-Pinney-like equation associated with the scalar wave equation in curved space-time is here studied. The example of Schwarzschild space-time considered in the present wor…

gr-qc2019★ 5 cited

The cosmological constant from Planckian fluctuations and the averaging procedure

Stefano Viaggiu

In this paper I continue the investigation in \cite{1,1b} concerning my proposal on the nature of the cosmological constant. In particular, I study both mathematically and physical…

gr-qc2019★ 6 cited

Mixing coproducts for theories with particle-dependent relativistic properties

Giovanni Amelino-Camelia, Michelangelo Palmisano, Michele Ronco +1

We analyze a few illustrative examples of scenarios in which relativistic symmetries are deformed by Planck-scale effects in particle-type-dependent manner. The novel mathematical…

gr-qc2019★ 10 cited

An effective-gravity perspective on the Sun-Jupiter-comet three-body system

Emmanuele Battista, Giampiero Esposito, Angelo Tartaglia

Within the solar system, approximate realizations of the three-body problem occur when a comet approaches a planet while being affected mainly by such a planet and the Sun, and thi…

gr-qc2019★ 124 cited

Ringdown overtones, black hole spectroscopy, and no-hair theorem tests

Swetha Bhagwat, Xisco Jimenez Forteza, Paolo Pani +1

Validating the black-hole no-hair theorem with gravitational-wave observations of compact binary coalescences provides a compelling argument that the remnant object is indeed a bla…

gr-qc2019★ 36 cited

Forecasts on the speed of gravitational waves at high

Alexander Bonilla, Rocco D'Agostino, Rafael C. Nunes +1

The observation of GW170817 binary neutron star (BNS) merger event has imposed strong bounds on the speed of gravitational waves (GWs) locally, inferring that the speed of GWs prop…

gr-qc2019★ 18 cited

Planck-scale-deformed relativistic symmetries and diffeomorphisms in momentum space

Giovanni Amelino-Camelia, Stefano Bianco, Giacomo Rosati

We study the implications of a change of coordinatization of momentum space for theories with curved momentum space. We of course find that after a passive diffeomorphism the theor…

gr-qc2019★ 21 cited

Casimir effect in free-fall towards a Schwarzschild black hole

Francesco Sorge, Justin H. Wilson

In this paper we discuss the Casimir effect in a small cavity, freely falling from spatial infinity in spacetime geometry outside of a Schwarzschild black hole. Our main goal is to…

gr-qc2019★ 40 cited

Cosmological perfect fluids in higher-order gravity

Salvatore Capozziello, Carlo Alberto Mantica, Luca Guido Molinari

We prove that in Robertson-Walker space-times (and in generalized Robertson-Walker spacetimes of dimension greater than 3 with divergence-free Weyl tensor) all higher-order gravita…

gr-qc2019★ 96 cited

Probing observational bounds on scalar-tensor theories from standard sirens

Rocco D'Agostino, Rafael C. Nunes

Standard sirens are the gravitational wave (GW) analog of the astronomical standard candles, and can provide powerful information about the dynamics of the Universe. In this work,…

gr-qc2019★ 4 cited

The physical origin of the cosmological constant: continuum limit and the analogy with the Casimir effect

Stefano Viaggiu

In this paper we continue the investigations in \cite{1} concerning the origin of the cosmological constant. First of all, we generalise the results in \cite{1,2} by considering a…

gr-qc2019★ 6 cited

Recovering the cosmological constant from affine geometry

Wladimir-Georges Boskoff, Salvatore Capozziello

A gravity theory without masses can be constructed in Minkowski spaces using a geometric Minkowski potential. The related affine spacelike spheres can be seen as the regions of the…

gr-qc2019★ 28 cited

Rotating and non-rotating AdS black holes in gravity non-linear electrodynamics

Salvatore Capozziello, Gamal G. L. Nashed

We derive new exact charged -dimensional black hole solutions for quadratic teleparallel equivalent gravity, , where is the t…

gr-qc2019★ 147 cited

Model comparison from LIGO-Virgo data on GW170817's binary components and consequences for the merger remnant

The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1191

GW170817 is the very first observation of gravitational waves originating from the coalescence of two compact objects in the mass range of neutron stars, accompanied by electromagn…

gr-qc2019★ 365 cited

AEDGE: Atomic Experiment for Dark Matter and Gravity Exploration in Space

Yousef Abou El-Neaj, Cristiano Alpigiani, Sana Amairi-Pyka +129

We propose in this White Paper a concept for a space experiment using cold atoms to search for ultra-light dark matter, and to detect gravitational waves in the frequency range bet…

gr-qc2019★ 49 cited

Cosmological perfect fluids in Gauss-Bonnet gravity

Salvatore Capozziello, Carlo Alberto Mantica, Luca Guido Molinari

In an -dimensional Friedmann-Robertson-Walker metric, it is rigorously shown that any analytical theory of gravity , where is the curvature scalar and $\cal G…

gr-qc2019★ 29 cited

Through the Big Bang in inflationary cosmology

Flavio Mercati

Singularities in General Relativity are regions where the description of spacetime in terms of a pseudo-Riemannian geometry breaks down. The theory seems unable to predict the evol…

gr-qc2019★ 76 cited

Search for intermediate mass black hole binaries in the first and second observing runs of the Advanced LIGO and Virgo network

The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1196

Gravitational wave astronomy has been firmly established with the detection of gravitational waves from the merger of ten stellar mass binary black holes and a neutron star binary.…

gr-qc2019★ 14 cited

Note on the symplectic structure of asymptotically flat gravity and BMS symmetries

Francesco Alessio, Michele Arzano

The Poisson brackets of the gravitational field at null infinity play a pivotal role in establishing the equivalence between the Ward identities involving BMS charges and the soft…

gr-qc2019★ 126 cited

Noether symmetries in Symmetric Teleparallel Cosmology

Konstantinos F. Dialektopoulos, Tomi S. Koivisto, Salvatore Capozziello

We consider a general theory of all possible quadratic, first-order derivative terms of the non-metricity tensor in the framework of Symmetric Teleparallel Geometry. We apply the N…

gr-qc2019★ 98 cited

All-sky search for short gravitational-wave bursts in the second Advanced LIGO and Advanced Virgo run

The LIGO Scientific Collaboration, the Virgo Collaboration, B. P. Abbott +1186

We present the results of a search for short-duration gravitational-wave transients in the data from the second observing run of Advanced LIGO and Advanced Virgo. We search for gra…

gr-qc2019★ 43 cited

Swampland conjecture in gravity by the Noether Symmetry Approach

Micol Benetti, Salvatore Capozziello, Leila Lobato Graef

Swampland conjecture has been recently proposed to connect early time cosmological models with the string landscape, and then to understand if related scalar fields and potentials…