Testing the Black-Hole Area Law with GW150914
M. IsiLIGO Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USAWill M. FarrCenter for Computational Astrophysics, Flatiron Institute, 162 5th Ave, New York, New York 10010, USAMatthew GieslerCornell Center for Astrophysics and Planetary Science, Cornell University, Ithaca, New York 14853, USAMark ScheelTAPIR, Walter Burke Institute for Theoretical Physics, California Institute of Technology, Pasadena, California 91125, USASaul A. TeukolskyCornell Center for Astrophysics and Planetary Science, Cornell University, Ithaca, New York 14853, USA
2021en
ABI
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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