Binary black-hole evolutions of excision and puncture data

TL;DR

This paper introduces a new numerical code for simulating binary black-hole systems, demonstrating high-accuracy waveforms and analyzing how initial data types influence gravitational wave signals.

Contribution

The paper presents a novel numerical code capable of evolving binary black-hole spacetimes with different initial data and techniques, providing detailed waveform comparisons.

Findings

State-of-the-art simulations of orbiting black holes

Convergent gravitational waveforms from various initial data

Dependence of waveforms on initial data types

Abstract

We present a new numerical code developed for the evolution of binary black-hole spacetimes using different initial data and evolution techniques. The code is demonstrated to produce state-of-the-art simulations of orbiting and inspiralling black-hole binaries with convergent waveforms. We also present the first detailed study of the dependence of gravitational waveforms resulting from three-dimensional evolutions of different types of initial data. For this purpose we compare the waveforms generated by head-on collisions of superposed Kerr-Schild, Misner and Brill-Lindquist data over a wide range of initial separations.