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Testing the Black-Hole Area Law with GW150914

M. Isi, W. Farr, M. Giesler, M. Scheel, S. Teukolsky

Physical Review Letters, 2020

71 citations

Abstract

We present observational confirmation of Hawking's black-hole area theorem based on data from GW150914, finding agreement with the prediction with 97% (95%) probability when we model the ringdown including (excluding) overtones of the quadrupolar mode. We obtain this result from a new time-domain analysis of the pre- and postmerger data. We also confirm that the inspiral and ringdown portions of the signal are consistent with the same remnant mass and spin, in agreement with general relativity.

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