Search for a stochastic background of 100-MHz gravitational waves with laser interferometers

Details Search for a stochastic background of 100-MHz gravitational waves with laser interferometers Search for a stochastic background of 100-MHz gravitational waves with laser interferometers

2008-03-28

arxiv.org/abs/0803.4094v2

Phys.Rev.Lett.101:101101,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Accepted by Phys.Rev.Lett.; 10 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.101.101101

This letter reports the results of a search for a stochastic background of gravitational waves (GW) at 100 MHz by laser interferometry. We have developed a GW detector, which is a pair of 75-cm baseline synchronous recycling (resonant recycling) interferometers. Each interferometer has a strain sensitivity of ~ 10^{-16} Hz^{-1/2} at 100 MHz. By cross-correlating the outputs of the two interferometers within 1000 seconds, we found h_{100}^2 Omega_{gw} < 6 times 10^{25} to be an upper limit on the energy density spectrum of the GW background in a 2-kHz bandwidth around 100 MHz, where a flat spectrum is assumed.

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