Speaker
Zaryab Ahmed
Description
In the ringdown phase of black hole binary coalescence, the remnant object is a rotating black hole. We use the Kerr metric in GR, where the mass and spin uniquely describe the black hole (no-hair theorem). However, one can model this remnant black hole with a non-Kerr metric provided that the metric is stationary and axisymmetric. The Johannsen-Psaltis metric is one such example. We go through the construction of this metric and use LIGO ringdown data to measure the values of the parameters in the Johannsen-Psaltis metric.
