742 citations · 1.4k across the 16 of their papers we have counts for
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Black holes, gravitational waves and fundamental physics: a roadmap
Leor Barack, Vitor Cardoso, Samaya Nissanke +203
The grand challenges of contemporary fundamental physics---dark matter, dark energy, vacuum energy, inflation and early universe cosmology, singularities and the hierarchy problem-…
Spin coefficients and gauge fixing in the Newman-Penrose formalism
Andrea Nerozzi
Since its introduction in 1962, the Newman-Penrose formalism has been widely used in analytical and numerical studies of Einstein's equations, like for example for the Teukolsky ma…
Error-analysis and comparison to analytical models of numerical waveforms produced by the NRAR Collaboration
Ian Hinder, Alessandra Buonanno, Michael Boyle +53
The Numerical-Relativity-Analytical-Relativity (NRAR) collaboration is a joint effort between members of the numerical relativity, analytical relativity and gravitational-wave data…
A new approach to the Newman-Penrose formalism
Andrea Nerozzi
The Newman-Penrose formalism in transverse tetrads, namely those tetrads where Ψ_1=Ψ_3=0, is studied. In particular it is shown that the equations governing the dynamics within thi…
Numerical relativity for D dimensional space-times: head-on collisions of black holes and gravitational wave extraction
Helvi Witek, Miguel Zilhao, Leonardo Gualtieri +4
Black objects in higher dimensional space-times have a remarkably richer structure than their four dimensional counterparts. They appear in a variety of configurations (e.g. black…
Black holes die hard: can one spin-up a black hole past extremality?
Mariam Bouhmadi-Lopez, Vitor Cardoso, Andrea Nerozzi +1
A possible process to destroy a black hole consists on throwing point particles with sufficiently large angular momentum into the black hole. In the case of Kerr black holes, it wa…
Numerical relativity for D dimensional axially symmetric space-times: formalism and code tests
Miguel Zilhao, Helvi Witek, Ulrich Sperhake +4
The numerical evolution of Einstein's field equations in a generic background has the potential to answer a variety of important questions in physics: from applications to the gaug…
Using curvature invariants for wave extraction in numerical relativity
Andrea Nerozzi, Oliver Elbracht
We present a new expression for the Weyl scalar Psi_4 that can be used in numerical relativity to extract the gravitational wave content of a spacetime. The formula relies upon the…
Scalar functions for wave extraction in numerical relativity
Andrea Nerozzi
Wave extraction plays a fundamental role in the binary black hole simulations currently performed in numerical relativity. Having a well defined procedure for wave extraction, whic…
Towards a novel wave-extraction method for numerical relativity
Andrea Nerozzi, Marco Bruni, Lior M. Burko +1
We present the recent results of a research project aimed at constructing a robust wave extraction technique for numerical relativity. Our procedure makes use of Weyl scalars to ac…
Towards a wave-extraction method for numerical relativity: IV. Testing the quasi-Kinnersley method in the Bondi-Sachs framework
Andrea Nerozzi, Marco Bruni, Virginia Re +1
We present a numerical study of the evolution of a non-linearly disturbed black hole described by the Bondi--Sachs metric, for which the outgoing gravitational waves can readily be…
Excision methods for high resolution shock capturing schemes applied to general relativistic hydrodynamics
Ian Hawke, Frank Löffler, Andrea Nerozzi
We present a simple method for applying excision boundary conditions for the relativistic Euler equations. This method depends on the use of Reconstruction-Evolution methods, a sta…
Newman-Penrose quantities as valuable tools in astrophysical relativity
Marco Bruni, Andrea Nerozzi, Frances White
In this talk I will briefly outline work in progress in two different contexts in astrophysical relativity, i.e. the study of rotating star spacetimes and the problem of reliably e…
Towards wave extraction in numerical relativity: the quasi-Kinnersley frame
Andrea Nerozzi, Christopher Beetle, Marco Bruni +2
The Newman-Penrose formalism may be used in numerical relativity to extract coordinate-invariant information about gravitational radiation emitted in strong-field dynamical scenari…
Towards a novel wave-extraction method for numerical relativity. I. Foundations and initial-value formulation
Christopher Beetle, Marco Bruni, Lior M. Burko +1
The Teukolsky formalism of black hole perturbation theory describes weak gravitational radiation generated by a mildly dynamical hole near equilibrium. A particular null tetrad of…