Statistical properties of astrophysical gravitational-wave backgrounds

被引：24

作者：

Meacher, Duncan ^{[1
]}

Thrane, Eric ^{[2
]}

Regimbau, Tania ^{[1
]}

机构：

[1] Univ Nice Sophia Antipolis, CNRS, UMR ARTEMIS, Observ Cote Azur, F-06304 Nice 4, France

[2] CALTECH, LIGO Lab, Pasadena, CA 91125 USA

来源：

PHYSICAL REVIEW D | 2014年 / 89卷 / 08期

基金：

美国国家科学基金会;

关键词：

NEUTRON-STAR; RADIATION; COALESCENCE; PREDICTIONS; BIRTH;

D O I：

10.1103/PhysRevD.89.084063

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：9

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