| Literature DB >> 27367379 |
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Chunglee Kim79, J Kim111, K Kim112, N Kim42, W Kim113, Y-M Kim111, S J Kimbrell65, E J King113, P J King39, J S Kissel39, B Klein83, L Kleybolte29, S Klimenko6, S M Koehlenbeck10, S Koley11, V Kondrashov1, A Kontos12, M Korobko29, W Z Korth1, I Kowalska62, D B Kozak1, V Kringel10, B Krishnan10, A Królak114,115, C Krueger19, G Kuehn10, P Kumar95, R Kumar86, L Kuo74, A Kutynia114, B D Lackey37, M Landry39, J Lange104, B Lantz42, P D Lasky116, M Laxen7, A Lazzarini1, C Lazzaro44, P Leaci30,80, S Leavey38, E O Lebigot32,71, C H Lee111, H K Lee112, H M Lee117, K Lee38, A Lenon37, M Leonardi89,90, J R Leong10, N Leroy25, N Letendre8, Y Levin116, J B Lewis1, T G F Li118, A Libson12, T B Littenberg119, N A Lockerbie108, A L Lombardi120, L T London91, J E Lord37, M Lorenzini14,15, V Loriette121, M Lormand7, G Losurdo58, J D Lough10,19, C O Lousto104, H Lück10,19, A P Lundgren10, R Lynch12, Y Ma52, B Machenschalk10, M MacInnis12, D M Macleod2, F Magaña-Sandoval37, L Magaña Zertuche37, R M 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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 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_{-0.9}^{+0.7}×10^{-22}. The inferred source-frame initial black hole masses are 14.2_{-3.7}^{+8.3}M_{⊙} and 7.5_{-2.3}^{+2.3}M_{⊙}, and the final black hole mass is 20.8_{-1.7}^{+6.1}M_{⊙}. 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_{-190}^{+180} Mpc corresponding to a redshift of 0.09_{-0.04}^{+0.03}. All uncertainties define a 90% credible interval. This second gravitational-wave observation provides improved constraints on stellar populations and on deviations from general relativity.Entities:
Year: 2016 PMID： 27367379 DOI： 10.1103/PhysRevLett.116.241103
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161