On the Gravitational Wave Noise from Unresolved Extragalactic Binaries

Details On the Gravitational Wave Noise from Unresolved Extragalactic Binaries On the Gravitational Wave Noise from Unresolved Extragalactic Binaries

1998-01-06

arxiv.org/abs/astro-ph/9801032v2

Astronomy and Astrophysics

Astrophysics

6 pages with 3 eps figures, l-aa.sty + epsf.sty, Revised version, errors fixed, accepted for publication in Astronomy and Astr

Scientific paper

We calculate stochastic gravitational wave background produced by extragalactic merging binary white dwarfs at the LISA frequencies $10^{-3}-10^{-2}$ Hz with account of a strong evolution of global star formation rate in the Universe recently established observationally. We show that for the observed global star formation history and modern cosmological models the extragalactic background is an order of magnitude smaller than the mean Galactic value. An early star formation burst at high redshifts can bring it at a higher level but still a few times lower than the mean Galactic one.

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