Fluctuations of Gravitational Wave Noise from Unresolved Extragalactic Sources

Details Fluctuations of Gravitational Wave Noise from Unresolved Extragalactic Sources Fluctuations of Gravitational Wave Noise from Unresolved Extragalactic Sources

1999-12-02

arxiv.org/abs/astro-ph/9912045v2

Astronomy and Astrophysics

Astrophysics

5 pages, 1 figure, accepted for publication in A&A, main journal, cor

Scientific paper

Angular fluctuations of stochastic gravitational wave backgrounds (GWB) produced by extragalactic astrophysical sources are calculated. The angular properties of such backgrounds are determined by the large scale structure of Universe (galaxy clustering). The evolution of star formation rate with redshift is taken into account. Fluctuations of the metric strain amplitude associated with such noises at angular scales of about one degree are found to be of order 5-20% slowly growing toward smaller angular scales. This feature can be potentially used to separate astrophysical GWB from cosmological ones in future experiments.

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