TestGravity · Precision Gravitational Wave Astronomy with Black Hole Perturbation Theory

Since 2015, gravitational waves have entered the realm of astronomy, providing a new channel to observe our universe. The groundbreaking measurements of gravitational waves have extended our knowledge of gravity, black holes, and neutron stars. Like all measurements probing new, extreme regimes, gravitational wave astronomy has the potential to uncover new fundamental physics.Analysing gravitational wave signals requires accurate theoretical waveform models. Black hole perturbation theory (BHPT) has significantly contributed to waveform modelling and helped us understand the nature of black hole dynamics. The next generation of gravitational wave detectors will produce richer data requiring more precise models. The Laser Interferometer Space Antenna (LISA) mission was recently adopted by the European Space Agency and is planned to launch in 2035. Producing precise measurements of binaries and testing gravity are two key science goals for the LISA mission, but such measurements will require precision waveform models beyond our current capabilities.This proposal will advance waveform modelling to the required accuracy for future detectors by extending BHPT. I will extend BHPT models in General Relativity to second perturbative order for spinning black hole spacetimes—and create new models in alternative theories of gravity. The waveforms produced will help measure binaries and perform tests of gravity with LISA and ground-based detectors. UCD is the ideal sponsor for my fellowship because of its world-leading research group in BHPT. Combining my expertise in the theory of BHPT and alternative theories of gravity with UCD's expertise in practical BHPT waveform calculation will cultivate knowledge exchange and a successful project impact. An MSCA fellowship will result in my research testing our theory of gravity with gravitational wave astronomy.