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Statistical properties of astrophysical gravitational-wave backgrounds

Meacher, Duncan and Thrane, Eric and Regimbau, Tania (2014) Statistical properties of astrophysical gravitational-wave backgrounds. Physical Review D, 89 (8). Art. No. 084063. ISSN 2470-0010.

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We investigate how a stochastic gravitational-wave background, produced from a discrete set of astrophysical sources, differs from an idealized model consisting of an isotropic, unpolarized, and Gaussian background. We focus, in particular, on the different signatures produced from these two cases, as observed in a cross-correlation search. We show that averaged over many realizations of an astrophysical background, the cross-correlation measurement of an astrophysical background is identical to that of an idealized background. However, any one realization of an astrophysical background can produce a different signature. Using a model consisting of an ensemble of binary neutron star coalescences, we quantify the typical difference between the signal from individual realizations of the astrophysical background and the idealized case. For advanced detectors, we find that, using a cross-correlation analysis, astrophysical backgrounds from many discrete sources are probably indistinguishable from an idealized background.

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Thrane, Eric0000-0002-4418-3895
Additional Information:© 2014 American Physical Society. Received 25 February 2014; published 17 April 2014. D.M. acknowledges the Ph.D. financial support from the Observatoire de la Cote d’Azur and the PACA region. D.M. would also like to thank the LIGO Laboratory and the California Institute of Technology for a visiting scientist fellowship under which part of this work was conducted. E. T. is a member of the LIGO Laboratory, supported by funding from United States National Science Foundation. LIGO was constructed by the California Institute of Technology and Massachusetts Institute of Technology with funding from the National Science Foundation and operates under Cooperative Agreement No. PHY-0757058. This paper has been assigned document number LIGO-P1400019.
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Observatoire de la Cote d'AzurUNSPECIFIED
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Issue or Number:8
Classification Code:PACS: 04.30.-w
Record Number:CaltechAUTHORS:20140516-110434145
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45803
Deposited By: Tony Diaz
Deposited On:16 May 2014 19:44
Last Modified:09 Mar 2020 13:19

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