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Spectrum of Relic Gravitational Waves in String Cosmology (1997)
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BibTeX
@MISC{Buonanno97spectrumof,
author = {Alessandra Buonanno and Ra Buonanno and Michele Maggiore and Carlo Ungarelli},
title = {Spectrum of Relic Gravitational Waves in String Cosmology},
year = {1997}
}
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Abstract
. We compute the spectrum of relic gravitons in a model of string cosmology. In the low- and in the high-frequency limits we reproduce known results. The full spectrum, however, also displays a series of oscillations which could give a characteristic signature at the planned LIGO/VIRGO detectors. For special values of the parameters of the model the signal reaches its maximum already at frequencies accessible to LIGO and VIRGO and it is close to the sensitivity of first generation experiments. 1 Introduction In the next few years a number of detectors for gravitational waves, and in particular the LIGO and VIRGO interferometers, are expected to start operating in a range of frequencies between 10 Hz and 1 kHz. One of the possible signals which could be searched, correlating the output of two detectors, is a stochastic background of gravitational waves. This background is expected to have different components, with different origin: it will get contributions from a large number...
Keyphrases
relic gravitational wave string cosmology gravitational wave virgo interferometer full spectrum first generation experiment different component ligo virgo detector different origin relic graviton possible signal special value stochastic background characteristic signature large number next year
