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Magnetically Induced Rotating Rayleigh-Taylor Instability

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Inspiral-merger-ringdown waveforms for black-hole binaries with nonprecessing spins.

P Ajith¹, M Hannam, S Husa

¹LIGO Laboratory, California Institute of Technology, Pasadena, California 91125, USA.

Physical Review Letters

|July 21, 2011

Summary

We developed new analytical gravitational waveforms for binary black hole (BBH) mergers with nonprecessing spins. These waveforms improve the detection of BBH events by covering a larger parameter space.

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Area of Science:

Astrophysics
General Relativity
Gravitational Wave Astronomy

Background:

Binary black hole (BBH) mergers are key sources of gravitational waves.
Accurate waveform models are crucial for detecting and analyzing these events.
Previous models had limitations in describing nonprecessing spin effects.

Purpose of the Study:

To develop the first analytical inspiral-merger-ringdown gravitational waveforms for BBHs with nonprecessing spins.
To create a waveform family with a reduced number of physical parameters.
To enhance the detection capabilities for BBH coalescences.

Main Methods:

Utilized a post-Newtonian description for the inspiral phase.
Matched the inspiral description to numerical relativity simulations.
Incorporated full general relativity for merger and ringdown phases.

Main Results:

Generated a novel family of analytical gravitational waveforms for nonprecessing BBH systems.
Achieved a waveform model with a small, manageable set of physical parameters.
Demonstrated the ability to detect a wider range of BBH coalescences.

Conclusions:

The new waveforms significantly expand the detectable parameter space for BBH mergers.
Improved detection rates are expected, including for comparable-mass, precessing binaries.
This advancement aids in the comprehensive study of black hole astrophysics.