Binary black holes are excellent laboratories for testing predictions of Einstein’s theory of gravity, General Relativity. I am involved in multiple approaches to testing general relativity using gravitational-wave observations.

We are learning about dense nuclear matter through gravitational-wave and electromagnetic observations of neutron stars.

Gravitational waves provide an independent channel for probing the expansion rate of the universe.

Constructing searches that can find weak signals in a background of detector noise has been key to LIGO’s success, and can be employed to find joint electromagnetic and gravitational-wave signals in the future.

Determining the properties of a gravitational-wave source — its mass, location, etc. — is paramount in gravitational-wave astronomy. I develop methods and software that use Bayesian inference to estimate the parameters of compact mergers.

The space-based LISA observatory, planned to fly in 2034, and ground-based Cosmic Explorer and Einstein Telescope, proposed to begin in the 2030s, have the potential to vastly increase our knowledge of the cosmos.