In:
Physical Review Letters, American Physical Society (APS), Vol. 116, No. 24 ( 2016-6-15)
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 σ . 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 44 0 − 190 + 180 Mpc corresponding to a redshift of 0.0 9 − 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. Published by the American Physical Society 2016
Type of Medium:
Online Resource
ISSN:
0031-9007
,
1079-7114
DOI:
10.1103/PhysRevLett.116.241103
Language:
English
Publisher:
American Physical Society (APS)
Publication Date:
2016
detail.hit.zdb_id:
1472655-5
detail.hit.zdb_id:
208853-8
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