arXiv:2012.04486gr-qc
Testing the black-hole area law with GW150914
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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.
Here's the paper: https://journals.aps.org/prl/accepted/36074Y8aM291c462a4e264... https://arxiv.org/abs/2012.04486
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