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

Pitkin, M. (2017) Upper Limits on the Stochastic Gravitational-Wave Background from Advanced LIGO's First Observing Run. Physical review letters, 118 (12). ISSN 1079-7114

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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.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Additional Information:
© 2019 American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
136647
Deposited By:
Deposited On:
17 Sep 2019 14:05
Refereed?:
Yes
Published?:
Published
Last Modified:
26 Sep 2020 06:12