GW151226: Observation of Gravitational Waves from a 22-Solar-Mass Binary Black Hole Coalescence

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Abbott, B.P.; Abbott, R.; Abbott, T.D.; Abernathy, M.R.; Acernese, F. et al.: GW151226: Observation of Gravitational Waves from a 22-Solar-Mass Binary Black Hole Coalescence. In: Physical Review Letters 116 (2016), Nr. 24, 241103. DOI: http://dx.doi.org/10.1103/PhysRevLett.116.241103

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We report the observation of a gravitational-wave signal produced by the coalescence of two stellar-mass black holes. The signal, GW151226, was observed by the twin detectors of the Laser Interferometer Gravitational-Wave Observatory (LIGO) on December 26, 2015 at 03:38:53 UTC. The signal was initially identified within 70 s by an online matched-filter search targeting binary coalescences. Subsequent off-line analyses recovered GW151226 with a network signal-to-noise ratio of 13 and a significance greater than 5σ. The signal persisted in the LIGO frequency band for approximately 1 s, increasing in frequency and amplitude over about 55 cycles from 35 to 450 Hz, and reached a peak gravitational strain of 3.4+0.7−0.9×10−22. The inferred source-frame initial black hole masses are 14.2+8.3−3.7M⊙ and 7.5+2.3−2.3M⊙, and the final black hole mass is 20.8+6.1−1.7M⊙. We find that at least one of the component black holes has spin greater than 0.2. This source is located at a luminosity distance of 440+180−190  Mpc corresponding to a redshift of 0.09+0.03−0.04. All uncertainties define a 90% credible interval. This second gravitational-wave observation provides improved constraints on stellar populations and on deviations from general relativity.
License of this version: CC BY 3.0
Document Type: article
Publishing status: publishedVersion
Issue Date: 2016
Appears in Collections:Fakultät für Mathematik und Physik

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1 image of flag of Germany Germany 107 88.43%
2 image of flag of United States United States 4 3.31%
3 image of flag of Brazil Brazil 4 3.31%
4 image of flag of Taiwan Taiwan 1 0.83%
5 image of flag of Peru Peru 1 0.83%
6 image of flag of Netherlands Netherlands 1 0.83%
7 image of flag of Hungary Hungary 1 0.83%
8 image of flag of United Kingdom United Kingdom 1 0.83%
9 image of flag of China China 1 0.83%

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