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GW151226: observation of gravitational waves from a 22-solar-mass binary black hole coalescence

GW151226: observation of gravitational waves from a 22-solar-mass binary black hole coalescence
GW151226: observation of gravitational waves from a 22-solar-mass binary black hole coalescence
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 5?. 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.
1-14
Abbott, B.P.
20b32f53-5355-40eb-9d69-91c95d56e693
Abbott, R.
ceb7bd1e-f214-46dd-9972-a194692a86aa
Abbott, T.D.
40955bf8-1011-46ab-a787-34050875d7fe
Jones, Ian
b8f3e32c-d537-445a-a1e4-7436f472e160
LIGO Scientific Collaboration and Virgo Collaboration
Abbott, B.P.
20b32f53-5355-40eb-9d69-91c95d56e693
Abbott, R.
ceb7bd1e-f214-46dd-9972-a194692a86aa
Abbott, T.D.
40955bf8-1011-46ab-a787-34050875d7fe
Jones, Ian
b8f3e32c-d537-445a-a1e4-7436f472e160

Abbott, B.P., Abbott, R. and Abbott, T.D. et al. , LIGO Scientific Collaboration and Virgo Collaboration (2016) GW151226: observation of gravitational waves from a 22-solar-mass binary black hole coalescence. Physical Review Letters, 116 (24), 1-14. (doi:10.1103/PhysRevLett.116.241103).

Record type: Article

Abstract

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 5?. 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.

Other
PhysRevLett.116.241103 - Version of Record
Available under License Creative Commons Attribution.
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Accepted/In Press date: 31 May 2016
e-pub ahead of print date: 15 June 2016
Published date: 15 June 2016
Organisations: Applied Mathematics

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Local EPrints ID: 404306
URI: https://eprints.soton.ac.uk/id/eprint/404306
PURE UUID: beed85ed-d78c-4739-9ff9-948f77470bf4

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Date deposited: 04 Jan 2017 15:09
Last modified: 12 Oct 2018 16:31

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