Representing the field equations

Before a numerical relativity simulation can begin, we need to turn the physical field equations into a well-posed differential equations problem for the computer.

Black Hole Spin

Characterizing a black-hole collision requires us to define what we mean by the angular momentum of warped space.

Ringdown to the final state

It was long presumed that when two black holes collide, the merger remnant must settle down to a stationary black hole. Checking this required numerical relativity and some clever engineering.

Visualizing the dynamics of spacetime

Computational relativity codes provide their results as a sea of numbers. Translating that sea of numbers into a visceral picture of spacetime dynamics requires new techniques of scientific visualization.