Luciano Rezzolla

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We present the first three-dimensional (3D) calculations of the gravitational-wave emission in the collapse of uniformly rotating stars to black holes. The initial models are polytropes which are dynamically unstable and near the mass-shedding limit. The waveforms have been extracted using a gauge-invariant approach and reflect the properties of both the(More)
A. M. Abrahams,1,2,3 L. Rezzolla,1 M. E. Rupright,3 A. Anderson,3 P. Anninos,1 T. W. Baumgarte,1 N. T. Bishop,4 S. R. Brandt,1 J. C. Browne,5 K. Camarda,6 M. W. Choptuik,5 G. B. Cook,7 R. R. Correll,5 C. R. Evans,3 L. S. Finn,8 G. C. Fox,9 R. Gómez,10 T. Haupt,9 M. F. Huq,5 L. E. Kidder,8 S. A. Klasky,9 P. Laguna,6 W. Landry,7 L. Lehner,10 J. Lenaghan,3 R.(More)
We present a new method of extracting gravitational radiation from three-dimensional numerical relativity codes and providing outer boundary conditions. Our approach matches the solution of a Cauchy evolution of Einstein’s equations to a set of one-dimensional linear wave equations on a curved background. We illustrate the mathematical properties of our(More)
Thibault Damour, Alessandro Nagar, Ernst Nils Dorband, Denis Pollney, and Luciano Rezzolla Institut des Hautes Etudes Scientifiques, 91440 Bures-sur-Yvette, France ICRANet, 65122 Pescara, Italy INFN, Sezione di Torino, Via Pietro Giuria 1, Torino, Italy Max-Planck-Institut für Gravitationsphysik, Albert-Einstein-Institut, Potsdam-Golm, Germany Department of(More)
Short gamma-ray Bursts (SGRBs) are among the most luminous explosions in the universe, releasing in less than one second the energy emitted by our Galaxy over one year. Despite decades of observations, the nature of their “central engine” remains unknown. Considering a binary of magnetized neutron stars and solving the Einstein equations, we show that their(More)
Recent work by McClarren & Hauck [31] suggests that the filtered spherical harmonics method represents an efficient, robust, and accurate method for radiation transport, at least in the two-dimensional (2D) case. We extend their work to the three-dimensional (3D) case and find that all of the advantages of the filtering approach identified in 2D are present(More)
We present fully general-relativistic simulations of binary neutron star mergers with a temperature and composition dependent nuclear equation of state. We study the dynamical mass ejection from both quasi-circular and dynamical-capture eccentric mergers. We systematically vary the level of our treatment of the microphysics to isolate the effects of(More)
We have recently presented an investigation in full general relativity of the dynamics and gravitational-wave emission from binary neutron stars which inspiral and merge, producing a black hole surrounded by a torus [1]. We here discuss in more detail the convergence properties of the results presented in [1] and, in particular, the deterioration of the(More)
Many astrophysical processes involving magnetic fields and quasi-stationary processes are well described when assuming the fluid as a perfect conductor. For these systems, the idealmagnetohydrodynamics (MHD) description captures the dynamics effectively and a number of well-tested techniques exist for its numerical solution. Yet, there are several(More)