TY - JOUR

T1 - Upper Limits on the Stochastic Gravitational-Wave Background from Advanced LIGO's First Observing Run

AU - LIGO Scientific Collaboration and Virgo Collaboration

AU - Pitkin, M.

N1 - © 2019 American Physical Society

PY - 2017/3/24

Y1 - 2017/3/24

N2 - 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.

AB - 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.

KW - General Relativity and Quantum Cosmology

KW - Astrophysics - Cosmology and Nongalactic Astrophysics

KW - Astrophysics - High Energy Astrophysical Phenomena

U2 - 10.1103/PhysRevLett.118.121101

DO - 10.1103/PhysRevLett.118.121101

M3 - Letter

VL - 118

JO - Physical review letters

JF - Physical review letters

SN - 1079-7114

IS - 12

M1 - 121101

ER -