Upper Limits on the Stochastic Gravitational-Wave Background from Advanced LIGO's First Observing Run

Abstract : A wide variety of astrophysical and cosmological sources are expected to contribute to a stochastic gravitational-wave background. Following the observations of GW150914 and GW151226, the rate and mass of coalescing binary black holes appear to be greater than many previous expectations. As a result, the stochastic background from unresolved compact binary coalescences is expected to be particularly loud. We perform a search for the isotropic stochastic gravitational-wave background using data from Advanced LIGO's first observing run. The data display no evidence of a stochastic gravitational-wave signal. We constrain the dimensionless energy density of gravitational waves to be $\Omega_0<1.7\times 10^{-7}$ with 95% confidence, assuming a flat energy density spectrum in the most sensitive part of the LIGO band (20-86 Hz). This is a factor of ~33 times more sensitive than previous measurements. We also constrain arbitrary power-law spectra. Finally, we investigate the implications of this search for the background of binary black holes using an astrophysical model for the background.
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Article dans une revue
Physical Review Letters, American Physical Society, 2017, 118, pp.121101 〈10.1103/PhysRevLett.118.121101〉
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http://hal.in2p3.fr/in2p3-01412187
Contributeur : Claudine Bombar <>
Soumis le : jeudi 8 décembre 2016 - 10:12:31
Dernière modification le : vendredi 12 janvier 2018 - 01:55:53

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B.P. Abbott, T. Adams, R. Bonnand, D. Buskulic, M. Ducrot, et al.. Upper Limits on the Stochastic Gravitational-Wave Background from Advanced LIGO's First Observing Run. Physical Review Letters, American Physical Society, 2017, 118, pp.121101 〈10.1103/PhysRevLett.118.121101〉. 〈in2p3-01412187〉

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