Reducing spurious gravitational radiation in binary-black-hole simulations by using conformally curved initial data

Abstract

At early times in numerical evolutions of binary black holes, current simulations contain an initial burst of spurious gravitational radiation (also called "junk radiation") which is not astrophysically realistic. The spurious radiation is a consequence of how the binary-black-hole initial data are constructed: the initial data are typically assumed to be conformally flat. In this paper, I adopt a curved conformal metric that is a superposition of two boosted, non-spinning black holes that are approximately 15 orbits from merger. I compare junk radiation of the superposed-boosted-Schwarzschild (SBS) initial data with the junk of corresponding conformally flat, maximally sliced (CFMS) initial data. The SBS junk is smaller in amplitude than the CFMS junk, with the junk's leading-order spectral modes typically being reduced by a factor of order two or more.

Submitted to Class. Quantum Grav. for inclusion in the "Numerical Relativity & Data Analysis 2008 proceedings" special issue

References in corpus (10)

• Total recoil: the maximum kick from nonspinning black-hole binary inspiral
• Reducing orbital eccentricity in binary black hole simulations
• Binary-black-hole initial data with nearly-extremal spins
• Where post-Newtonian and numerical-relativity waveforms meet
• Testing outer boundary treatments for the Einstein equations
• Approximate Killing Vectors on S^2
• Black hole puncture initial data with realistic gravitational wave content
• Beyond the Bowen-York extrinsic curvature for spinning black holes
• Recoiling from a kick in the head-on collision of spinning black holes
• Robustness of Binary Black Hole Mergers in the Presence of Spurious Radiation