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공공누리This item is licensed Korea Open Government License

Title
Upper Limits on the Stochastic Gravitational-Wave Background from Advanced LIGO’s First Observing Run
Author(s)
LIGO Scientific Collaboration and Virgo Collaboration강궁원조희석
Publication Year
2017-03-24
Abstract
A wide variety of astrophysical and cosmological sources are expected to contribute to a stochasticgravitational-wave background. Following the observations of GW150914 and GW151226, the rate andmass of coalescing binary black holes appear to be greater than many previous expectations. As a result, thestochastic 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 AdvancedLaser Interferometer Gravitational Wave Observatory’s (aLIGO) first observing run. The data display noevidence of a stochastic gravitational-wave signal. We constrain the dimensionless energy density ofgravitational waves to be Ω0 < 1.7 × 10−7 with 95% confidence, assuming a flat energy density spectrumin the most sensitive part of the LIGO band (20–86 Hz). This is a factor of ∼33 times more sensitive thanprevious measurements. We also constrain arbitrary power-law spectra. Finally, we investigate theimplications of this search for the background of binary black holes using an astrophysical model for thebackground.
Keyword
Stochastic Gravitational-Wave; LIGO O1
Journal Title
Physical Review Letters
Citation Volume
118
ISSN
0031-9007
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7. KISTI 연구성과 > 학술지 발표논문
URI
https://repository.kisti.re.kr/handle/10580/14688
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