Spins of primordial black holes formed in different cosmological scenarios

被引：25

作者：

Flores, Marcos M. ^{[1
]}

Kusenko, Alexander ^{[1
,2
]}

机构：

[1] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA

[2] Univ Tokyo, Univ Tokyo Inst Adv Study, Kavli Inst Phys & Math Universe WPI, Kashiwa, Chiba 2778583, Japan

来源：

PHYSICAL REVIEW D | 2021年 / 104卷 / 06期

基金：

日本学术振兴会;

关键词：

GRAVITATIONAL-INSTABILITY; GALAXIES; ROTATION; MATTER;

D O I：

10.1103/PhysRevD.104.063008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Primordial black holes (PBHs) could account for all or part of dark matter, as well as for some LIGO events. We discuss the spins of primordial black holes produced in different cosmological scenarios, with the emphasis on recently discovered possibilities. PBHs produced as a horizon-size collapse of density perturbations are known to have very small spins. In contrast, PBHs resulting from assembly of matterlike objects (particles, Q-balls, oscillons, etc.) can have large or small spins depending on their formation history and the efficiency of radiative cooling. We show that scalar radiation can remove the angular momentum very efficiently, leading to slowly rotating PBHs in those scenarios for which the radiative cooling is important. Gravitational waves astronomy offers an opportunity to determine the spins of black holes, opening a new window on the early Universe if, indeed, some black holes have primordial origin.

引用

页数：6

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