Gravitational Waves from a Fissioning White Hole

TL;DR

This paper presents a fully nonlinear calculation of gravitational waveforms from a fissioning white hole, revealing complex nonlinear effects and setting the stage for studying post-merger black hole radiation.

Contribution

It provides the first fully nonlinear waveform calculation for white hole fission, extending beyond perturbative methods.

Findings

Waveforms agree with perturbative calculations at early times

Nonlinear regime shows dramatic time and angular dependence

Results enable future studies of black hole merger radiation

Abstract

We present a fully nonlinear calculation of the waveform of the gravitational radiation emitted in the fission of a vacuum white hole. At early times, the waveforms agree with close-approximation perturbative calculations but they reveal dramatic time and angular dependence in the nonlinear regime. The results pave the way for a subsequent computation of the radiation emitted after a binary black hole merger.