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Testing the no-hair theorem with GW150914

Isi, Maximiliano and Giesler, Matthew and Farr, Will M. and Scheel, Mark A. and Teukolsky, Saul A. (2019) Testing the no-hair theorem with GW150914. Physical Review Letters, 123 (11). Art. No. 111102. ISSN 0031-9007. doi:10.1103/PhysRevLett.123.111102.

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We analyze gravitational-wave data from the first LIGO detection of a binary black-hole merger (GW150914) in search of the ringdown of the remnant black hole. Using observations beginning at the peak of the signal, we find evidence of the fundamental quasinormal mode and at least one overtone, both associated with the dominant angular mode (ℓ=m=2), with 3.6σ confidence. A ringdown model including overtones allows us to measure the final mass and spin magnitude of the remnant exclusively from postinspiral data, obtaining an estimate in agreement with the values inferred from the full signal. The mass and spin values we measure from the ringdown agree with those obtained using solely the fundamental mode at a later time, but have smaller uncertainties. Agreement between the postinspiral measurements of mass and spin and those using the full waveform supports the hypothesis that the GW150914 merger produced a Kerr black hole, as predicted by general relativity, and provides a test of the no-hair theorem at the ∼10% level. An independent measurement of the frequency of the first overtone yields agreement with the no-hair hypothesis at the ∼20% level. As the detector sensitivity improves and the detected population of black hole mergers grows, we can expect that using overtones will provide even stronger tests.

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URLURL TypeDescription Paper InPhysics : Synopsis
Isi, Maximiliano0000-0001-8830-8672
Giesler, Matthew0000-0003-2300-893X
Farr, Will M.0000-0003-1540-8562
Teukolsky, Saul A.0000-0001-9765-4526
Additional Information:© 2019 American Physical Society. Received 5 May 2019; published 12 September 2019. This research has made use of data, software, and/or Web tools obtained from the Gravitational Wave Open Science Center [50,56], a service of the LIGO Laboratory, the LIGO Scientific Collaboration, and the Virgo Collaboration. We thank Aaron Zimmerman for valuable feedback. We thank Gregorio Carullo, Walter del Pozzo, and John Veitch for discussions of their paper on and methods for time-domain analysis [29]. We thank Alessandra Buonanno for clarifications on past use of quasinormal and pseudoquasinormal ringdown modes in waveform modeling. M. I. is supported by NASA through the NASA Hubble Fellowship Grant No. HST-HF2-51410.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under Contract No. NAS5-26555. M. I. is a member of the LIGO Laboratory. LIGO was constructed by the California Institute of Technology and Massachusetts Institute of Technology with funding from the National Science Foundation and operates under Cooperative Agreement No. PHY-0757058. M. G. and M. A. S. are supported by the Sherman Fairchild Foundation and NSF Grants No. PHY-1708212 and No. PHY-1708213 at Caltech. S. A. T. is supported in part by the Sherman Fairchild Foundation and by NSF Grants No. PHY-1606654 and No. ACI-1713678 at Cornell. The Flatiron Institute is supported by the Simons Foundation. This paper carries LIGO Document No. LIGO-P1900135.
Group:LIGO, TAPIR, Walter Burke Institute for Theoretical Physics, Astronomy Department
Funding AgencyGrant Number
NASA Hubble FellowshipHST-HF2-51410.001-A
Sherman Fairchild FoundationUNSPECIFIED
Simons FoundationUNSPECIFIED
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Other Numbering System NameOther Numbering System ID
LIGO DocumentP1900135
Issue or Number:11
Record Number:CaltechAUTHORS:20190821-152942401
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98089
Deposited By: Tony Diaz
Deposited On:21 Aug 2019 22:39
Last Modified:16 Nov 2021 17:36

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