Improved upper limits on the stochastic gravitational-wave background from 2009-2010 LIGO and Virgo data

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dc.identifier.uri Aasi, J. Allen, Bruce Ast, Stefan Aufmuth, Peter Danzmann, Karsten Kaufer, S. Lück, Harald Meier, Tobias Schnabel, R. Vahlbruch, H. Willke, Benno et al. LIGO Scientific Collaboration Virgo Collaboration 2017-10-26T08:40:26Z 2017-10-26T08:40:26Z 2014
dc.identifier.citation Aasi, J.; Abadie, J.; Abbott, B.P.; Abbott, R.; Abbott, T. et al.: Improved upper limits on the stochastic gravitational-wave background from 2009-2010 LIGO and Virgo data. In: Physical Review Letters 113 (2014), Nr. 23, No. 231101. DOI:
dc.description.abstract Gravitational waves from a variety of sources are predicted to superpose to create a stochastic background. This background is expected to contain unique information from throughout the history of the Universe that is unavailable through standard electromagnetic observations, making its study of fundamental importance to understanding the evolution of the Universe. We carry out a search for the stochastic background with the latest data from the LIGO and Virgo detectors. Consistent with predictions from most stochastic gravitational-wave background models, the data display no evidence of a stochastic gravitational-wave signal. Assuming a gravitational-wave spectrum of ΩGW(f)=Ωα(f/fref)α, we place 95% confidence level upper limits on the energy density of the background in each of four frequency bands spanning 41.5–1726 Hz. In the frequency band of 41.5–169.25 Hz for a spectral index of α=0, we constrain the energy density of the stochastic background to be ΩGW(f)<5.6×10−6. For the 600–1000 Hz band, ΩGW(f)<0.14(f/900  Hz)3, a factor of 2.5 lower than the best previously reported upper limits. We find ΩGW(f)<1.8×10−4 using a spectral index of zero for 170–600 Hz and ΩGW(f)<1.0(f/1300  Hz)3 for 1000–1726 Hz, bands in which no previous direct limits have been placed. The limits in these four bands are the lowest direct measurements to date on the stochastic background. We discuss the implications of these results in light of the recent claim by the BICEP2 experiment of the possible evidence for inflationary gravitational waves. © 2014 The American Physical Society eng
dc.language.iso eng
dc.publisher College Park, MD : American Physical Society
dc.relation.ispartofseries Physical Review Letters 113 (2014), Nr. 23
dc.rights Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
dc.subject Stochastic Gravitational-Wave Background eng
dc.subject Gravitational waves eng
dc.subject Gravitationswelle ger
dc.subject.ddc 530 | Physik ger
dc.title Improved upper limits on the stochastic gravitational-wave background from 2009-2010 LIGO and Virgo data
dc.type article
dc.type Text
dc.relation.issn 0031-9007
dc.bibliographicCitation.issue 23
dc.bibliographicCitation.volume 113
dc.bibliographicCitation.firstPage 231101
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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