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  News from horizons in binary black hole mergers

Prasad, V., Gupta, A., Bose, S., Krishnan, B., & Schnetter, E. (2020). News from horizons in binary black hole mergers. Physical Review Letters, 125: 121101. doi:10.1103/PhysRevLett.125.121101.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0007-1F27-C Version Permalink: http://hdl.handle.net/21.11116/0000-0007-1F28-B
Genre: Journal Article

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Prasad, Vaishak, Author
Gupta, Anshu, Author
Bose, Sukanta1, Author              
Krishnan, Badri1, Author              
Schnetter, Erik, Author
Affiliations:
1Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc
 Abstract: In a binary black hole merger, it is known that the inspiral portion of the waveform corresponds to two distinct horizons orbiting each other, and the merger and ringdown signals correspond to the final horizon being formed and settling down to equilibrium. However, we still lack a detailed understanding of the relation between the horizon geometry in these three regimes and the observed waveform. Here we show that the well known inspiral chirp waveform has a clear counterpart on black hole horizons, namely, the shear of the outgoing null rays at the horizon. We demonstrate that the shear behaves very much like a compact binary coalescence waveform with increasing frequency and amplitude. Furthermore, the parameters of the system estimated from the horizon agree with those estimated from the waveform. This implies that even though black hole horizons are causally disconnected from us, assuming general relativity to be true, we can potentially infer some of their detailed properties from gravitational wave observations.

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 Dates: 2020-03-132020
 Publication Status: Published in print
 Pages: 7 Pages, 1 Figure
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: arXiv: 2003.06215
DOI: 10.1103/PhysRevLett.125.121101
 Degree: -

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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 125 Sequence Number: 121101 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1