Yosef Zlochower

TL;DR: In this paper, the authors used null hypersurface techniques to calculate the waveform from a binary black hole merger in the close approximation, and showed that the process of removing ingoing radiation from the system leads to two notable features in the shape of the close-approximation waveform for a head-on collision of black holes: an initial quasinormal ringup and a weak sensitivity to the parameter controlling the collision velocity.

TL;DR: In this paper, the authors review some of the recent dramatic developments in the fully nonlinear simulation of generic, highly-precessing, black-hole binaries, and introduce a new approach for generating hybrid post-Newtonian/numerical waveforms for these challenging systems.

TL;DR: In this paper, the authors developed a technique for determining algebraic classification of a numerically generated spacetime, possibly resulting from a generic black-hole-binary merger, using the Newman-Penrose Weyl scalars.

TL;DR: In this paper, the authors used post-Newtonian approximations to determine the initial orbital and spin parameters of black hole binaries that lead to low-eccentricity inspirals when evolved with numerical relativity techniques.

TL;DR: In this paper, the authors demonstrate that numerical relativity codes based on the moving punctures formalism are capable of evolving nearly maximally spinning black hole binaries, and compare a new evolution of an equal-mass, aligned-spin binary with dimensionless spin chi=0.99 using puncture-based data with recent simulations of the SXS Collaboration.