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  Testing the no-hair nature of binary black holes using the consistency of multipolar gravitational radiation

Islam, T., Mehta, A. K., Ghosh, A., Varma, V., Ajith, P., & Sathyaprakash, B. S. (2020). Testing the no-hair nature of binary black holes using the consistency of multipolar gravitational radiation. Physical Review D, 101(2): 024032. doi:10.1103/PhysRevD.101.024032.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-A5DD-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-A5DE-7
Genre: Journal Article

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 Creators:
Islam, Tousif, Author
Mehta, Ajit Kumar, Author
Ghosh, Abhirup1, Author              
Varma, Vijay, Author
Ajith, Parameswaran, Author
Sathyaprakash, B. S., Author
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1Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290              

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Free keywords: General Relativity and Quantum Cosmology, gr-qc
 Abstract: Gravitational-wave (GW) observations of binary black holes offer the best probes of the relativistic, strong-field regime of gravity. Gravitational radiation, in the leading order is quadrupolar. However, non-quadrupole (higher-order) modes make appreciable contribution to the radiation from binary black holes with large mass ratios and misaligned spins. The multipolar structure of the radiation is fully determined by the intrinsic parameters (masses and spin angular momenta of the companion black holes) of a binary in quasi-circular orbit. Following our previous work \cite{Dhanpal:2018ufk}, we develop multiple ways of testing the consistency of the observed GW signal with the expected multipolar structure of radiation from binary black holes in general relativity. We call this a "no-hair" test of binary black holes as this is similar to testing the "no-hair" theorem for isolated black holes through mutual consistency of the quasi-normal mode spectrum. We use Bayesian inference on simulated GW signals that are consistent/inconsistent with binary black holes in GR to demonstrate the power of the proposed tests. We also make estimate systematic errors arising as a result of neglecting companion spins.

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 Dates: 2019-10-312020
 Publication Status: Published in print
 Pages: 10 pages, 13 figures
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 Rev. Method: -
 Identifiers: arXiv: 1910.14259
DOI: 10.1103/PhysRevD.101.024032
URI: http://arxiv.org/abs/1910.14259
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Title: Physical Review D
Source Genre: Journal
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Pages: - Volume / Issue: 101 (2) Sequence Number: 024032 Start / End Page: - Identifier: -