A full waveform model for arbitrarily axis-symmetric black hole mergers

TL;DR

This paper introduces a comprehensive waveform model for axisymmetric black hole mergers that extends previous models to include non-GR deviations, enabling precise tests of black hole properties with current and future gravitational wave detectors.

Contribution

We develop a full waveform model for axisymmetric black holes that incorporates non-GR deviations, combining inspiral and ringdown phases for improved black hole testing.

Findings

Deviation from Kerr quadrupole moment can be measured with high accuracy.

The model is applicable to current and future gravitational wave detectors.

It enables direct tests of black hole deviations from general relativity.

Abstract

In this work, we present a non-GR full waveform for general parametrization of axisymmetric black holes by extending our previous PSI model. Our model comprises two main components: an inspiral part obtained by using phenomenological method in frequency-domain and a ringdown part derived from quasinormal modes associated with photon motion. For quantitatively revealing the influence of the deviation from Kerr black holes on the waveforms, we specify our model to the bumpy black holes, which are typical examples of non-GR black holes. The results show that the deviation from the Kerr quadrupole moment could be measured in a high accuracy. The new waveform model can be directly used to test black holes for the LIGO-Virgo-KAGRA observations, the third generation detectors and space-borne interferometers.