Searching for a Stochastic Background of Gravitational Waves with LIGO

Details Searching for a Stochastic Background of Gravitational Waves with LIGO Searching for a Stochastic Background of Gravitational Waves with LIGO

2006-08-28

arxiv.org/abs/astro-ph/0608606v2

Astrophys.J.659:918-930,2007

Astronomy and Astrophysics

Astrophysics

37 pages, 16 figures

Scientific paper

10.1086/511329

The Laser Interferometer Gravitational-wave Observatory (LIGO) has performed the fourth science run, S4, with significantly improved interferometer sensitivities with respect to previous runs. Using data acquired during this science run, we place a limit on the amplitude of a stochastic background of gravitational waves. For a frequency independent spectrum, the new limit is $\Omega_{\rm GW} < 6.5 \times 10^{-5}$. This is currently the most sensitive result in the frequency range 51-150 Hz, with a factor of 13 improvement over the previous LIGO result. We discuss complementarity of the new result with other constraints on a stochastic background of gravitational waves, and we investigate implications of the new result for different models of this background.

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