A cosmological background of gravitational waves produced by supernovae in the early Universe

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    Abstract

    Simple arguments demonstrate that the rate of supernovae within a redshift horizon of z similar to 2 is at least of the order of 10(10) yr(-1) or 1000 s(-1) , This rate could be enhanced by more than an order of magnitude if the supernova rate in the early Universe is enhanced as predicted by star formation models, metallicity observations and the recent observations of an abundance of faint blue galaxies at high redshift, The gravitational waves from supernovae in the early Universe create a continuous stochastic background, The amplitude of this background depends on the efficiency of gravitational wave production in supernovae, which in turn depends on the fraction of collapses which ct-sate neutron stars and black holes, the dynamics of the collapse and the post collapse evolution of the system. It is shown that the stochastic supernova background is detectable by the cross-correlation of nearby detectors if the efficiency of gravitational wave production exceeds 10(-5). The expected spectrum is in the frequency band well-suited for both laser interferometer and resonant mass detectors and cross-correlation between advanced bars and interferometers provides an appropriate means of dectection.
    Original languageEnglish
    Pages (from-to)648-650
    JournalMonthly Notices of the Royal Astronomical Society
    Volume283
    Issue number2
    DOIs
    Publication statusPublished - 1996

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