Gravitational wave production right after a primordial black hole evaporation

被引：133

作者：

Inomata, Keisuke ^{[1
,2
]}

Kawasaki, Masahiro ^{[1
,2
]}

Mukaida, Kyohei ^{[3
]}

Terada, Takahiro ^{[4
]}

Yanagida, Tsutomu T. ^{[2
,5
,6
]}

机构：

[1] Univ Tokyo, ICRR, Kashiwa, Chiba 2778582, Japan

[2] Univ Tokyo, UTIAS, Kavli IPMU WPI, Kashiwa, Chiba 2778583, Japan

[3] DESY, Notkestr 85, D-22607 Hamburg, Germany

[4] Inst Basic Sci IBS, Ctr Theoret Phys Universe, Daejeon 34126, South Korea

[5] Shanghai Jiao Tong Univ, TD Lee Inst, 800 Dongchuan Rd, Shanghai 200240, Peoples R China

[6] Shanghai Jiao Tong Univ, Sch Phys & Astron, 800 Dongchuan Rd, Shanghai 200240, Peoples R China

来源：

PHYSICAL REVIEW D | 2020年 / 101卷 / 12期

关键词：

BARYOGENESIS; CONSTRAINTS; INFLATION;

D O I：

10.1103/PhysRevD.101.123533

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We discuss the footprint of evaporation of primordial black holes (PBHs) on stochastic gravitational waves (GWs) induced by scalar perturbations. We consider the case where PBHs once dominated the Universe but eventually evaporated before the big bang nucleosynthesis. The reheating through the PBH evaporation could end with a sudden change in the equation of state of the Universe compared to the conventional reheating caused by particle decay. We show that this "sudden reheating" by the PBH evaporation enhances the induced GWs, whose amount depends on the length of the PBH-dominated era and the width of the PBH mass function. We explore the possibility to constrain the primordial abundance of the evaporating PBHs by observing the induced GWs. We find that the abundance parameter beta greater than or similar to 10(-5) - 10(-8) for O(10(3) - 10(5)) PBHs can be constrained by future GW observations if the width of the mass function is smaller than about a hundredth of the mass.

引用

页数：25

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