Redshift factor from numerical relativity in the high mass ratio limit.

The redshift factor helps us model high mass ratio inspirals by: providing a benchmark to different approximation schemes, connecting the first order redshift to second order binding energy and angular momentum, and playing a direct role in the hamiltonian formulation of EMRI dynamics. In this work we use numerical relativity simulations to extract the redshift factor in the high mass ratio limit. We compare it to the predicted value from first order gravitational self-force as well as giving a prediction of the second order contribution.