Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2011-12-21
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
29 pages, 6 figures. For a repository of data used in the publication, please see https://dcc.ligo.org/cgi-bin/DocDB/ShowDoc
Scientific paper
A stochastic background of gravitational waves is expected to arise from a superposition of many incoherent sources of gravitational waves, of either cosmological or astrophysical origin. This background is a target for the current generation of ground-based detectors. In this article we present the first joint search for a stochastic background using data from the LIGO and Virgo interferometers. In a frequency band of 600-1000 Hz, we obtained a 95% upper limit on the amplitude of $\Omega_{\rm GW}(f) = \Omega_3 (f/900 \mathrm{Hz})^3$, of $\Omega_3 < 0.33$, assuming a value of the Hubble parameter of $h_{100}=0.72$. These new limits are a factor of seven better than the previous best in this frequency band.
Abadie J.
Abbott B. P.
Abbott Richard
Abbott T. D.
Abernathy M.
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