Gravitational wave anisotropies from primordial black holes

被引：60

作者：

Bartolo, N. ^{[1
,2
,3
]}

Bertacca, D. ^{[1
]}

De Luca, V ^{[4
,5
]}

Franciolini, G. ^{[4
,5
]}

Matarrese, S. ^{[1
,2
,3
,6
]}

Peloso, M. ^{[1
,2
]}

Ricciardone, A. ^{[2
]}

Riotto, A. ^{[4
,5
,7
]}

Tasinato, G. ^{[8
]}

机构：

[1] Univ Padua, Dipartimento Fis & Astron G Galilei, I-35131 Padua, Italy

[2] Ist Nazl Fis Nucl, Sez Padova, Via F Marzolo 8, I-35131 Padua, Italy

[3] INAF, Osservatorio Astron Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy

[4] Dept Theoret Phys, 24 Quai Ernest Ansermet, CH-1211 Geneva 23, Switzerland

[5] Ctr Astroparticle Phys, 24 Quai Ernest Ansermet, CH-1211 Geneva 23, Switzerland

[6] Gran Sasso Sci Inst, Viale F Crispi 7, I-67100 Laquila, Italy

[7] CERN, Theoret Phys Dept, 1 Esplanade Particules, CH-1211 Geneva 23, Switzerland

[8] Swansea Univ, Dept Phys, Swansea SA2 8PP, W Glam, Wales

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2020年 / 02期

基金：

瑞士国家科学基金会;

关键词：

gravitational waves / theory; primordial black holes; NON-GAUSSIANITY; PERTURBATIONS; INFLATION;

D O I：

10.1088/1475-7516/2020/02/028

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

An observable stochastic background of gravitational waves is generated whenever primordial black holes are created in the early universe thanks to a small-scale enhancement of the curvature perturbation. We calculate the anisotropies and non-Gaussianity of such stochastic gravitational waves background which receive two contributions, the first at formation time and the second due to propagation effects. The former contribution can be generated if the distribution of the curvature perturbation is characterized by a local and scale-invariant shape of non-Gaussianity. Under such an assumption, we conclude that a sizeable magnitude of anisotropy and non-Gaussianity in the gravitational waves would suggest that primordial black holes may not comply the totality of the dark matter.

引用

页数：23

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