Inferring Inspiral Properties of Binary Black-hole Mergers from the Ringdown

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Abstract:: The effect of the progenitor masses and spins on the gravitational-wave signal from a binary black hole merger is relatively well understood, but less is known about how misaligned spins impact the ringdown signal. Therefore, it is an open question what we can infer about inspiral parameters from the ringdown alone. As several of the high-mass (most ringdown-dominated) binary black hole systems observed by LIGO have misaligned spins, the ability to predict inspiral properties from the ringdown would give us great insight into this portion of the population of black holes that are undergoing merger. In this project, we will extract quasi-normal modes from the ringdown signal in simulated gravitational-wave signals to determine if and how well those modes can accurately infer information about the inspiral. If what these modes predict is consistent with the properties of the simulation, this could be applied to real gravitational wave data to infer inspiral parameters.

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LIGO Document T2500229-v2