Stochastic gravitational wave background anisotropies in the mHz band: astrophysical dependencies

被引：39

作者：

Cusin, Giulia ^{[1
]}

Dvorkin, Irina ^{[2
,3
]}

Pitrou, Cyril ^{[3
]}

Uzan, Jean-Philippe ^{[3
]}

机构：

[1] Univ Oxford, Astrophys Dept, DWB, Keble Rd, Oxford OX1 3RH, England

[2] Albert Einstein Inst, Max Planck Inst Gravitat Phys, Muhlenberg 1, D-14476 Potsdam, Germany

[3] Sorbonne Univ, Inst Astrophys Paris, CNRS UMR 7095, 8 Bis,Bd Arago, F-75014 Paris, France

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2020年 / 493卷 / 01期

关键词：

gravitational waves; stars:; massive; black holes; BINARY BLACK-HOLES; EVOLUTION;

D O I：

10.1093/mnrasl/slz182

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that the anisotropies of the astrophysical stochastic gravitational wave background in the mHz band have a strong dependence on the modelling of galactic and sub-galactic physics. We explore a wide range of self-consistent astrophysical models for stellar evolution and for the distribution of orbital parameters, all calibrated such that they predict the same number of resolved mergers to fit the number of detections during LIGONirgo O1 + O2 observations runs. We show that different physical choices for the process of black hole (BH) collapse and cut-off in the BII mass distribution give fractional differences in the angular power spectrum of anisotropies of up to 50 per cent on all angular scales. We also point out that the astrophysical information which can be extracted from anisotropies is complementary to the isotropic background and individual mergers. These results underline the interest in the anisotropies of the stochastic gravitational wave background as a new and potentially rich field of research, at the cross-road between astrophysics and cosmology.

引用

页码：L1 / L5

页数：5

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