Gravitational waves from black hole collisions via an eclectic approach

TL;DR

This paper introduces a novel combined approach using close-limit approximation and numerical relativity to better understand gravitational waves from black hole collisions, aiming to enhance observational predictions.

Contribution

The paper presents a new unified method that integrates different techniques to analyze black hole mergers, improving physical insight and readiness for gravitational wave detection.

Findings

Effective modeling of black hole collisions using combined methods

Clear identification of when nonlinear effects are significant

Supports timely astrophysical predictions for gravitational wave observations

Abstract

We present the first results in a new program intended to make the best use of all available technologies to provide an effective understanding of waves from inspiralling black hole binaries in time for imminent observations. In particular, we address the problem of combining the close-limit approximation describing ringing black holes and full numerical relativity, required for essentially nonlinear interactions. We demonstrate the effectiveness of our approach using general methods for a model problem, the head-on collision of black holes. Our method allows a more direct physical understanding of these collisions indicating clearly when non-linear methods are important. The success of this method supports our expectation that this unified approach will be able to provide astrophysically relevant results for black hole binaries in time to assist gravitational wave observations.