Abbott, B.P.; Abbott, R.; Abbott, T.D.; Abernathy, M.R.; Acernese, F. et al.: Upper Limits on the Stochastic Gravitational-Wave Background from Advanced LIGO's First Observing Run. In: Physical Review Letters 118 (2017), Nr. 12, 121101. DOI:
https://doi.org/10.1103/PhysRevLett.118.121101
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 Laser Interferometer Gravitational Wave Observatory's (aLIGO) 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 Ω0<1.7×10-7 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. © 2017 American Physical Society.
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License of this version: |
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Publication type: |
Article |
Publishing status: |
publishedVersion |
Publication date: |
2017 |
Keywords english: |
Astrophysics, Flocculation, Gravitational effects, Interferometers, Laser interferometry, Stars, Stochastic systems, Black holes, Data display, Energy density, Energy density spectrum, Gravitational-wave signals, Laser interferometer gravitational-wave observatories, Physical Review, Upper limits, Gravity waves
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DDC: |
530 Physik
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