Constraining primordial black holes in dark matter with kinematics of dwarf galaxies

被引：5

作者：

Lu, Bo-Qiang ^{[1
,2
]}

Wu, Yue-Liang ^{[1
,3
]}

机构：

[1] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China

[2] Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

PHYSICAL REVIEW D | 2019年 / 99卷 / 12期

关键词：

N-BODY SIMULATIONS; ANISOTROPIC VELOCITY DISTRIBUTIONS; FOKKER-PLANCK MODELS; STAR-CLUSTERS; GLOBULAR-CLUSTERS; DYNAMIC PROPERTIES; MASSES; STATISTICS; PARAMETERS; DISPERSION;

D O I：

10.1103/PhysRevD.99.123023

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We propose that the kinematical observations of dwarf galaxies can be used to constrain the primordial black hole's (PBH) abundance in dark matter since the presence of primordial black holes in star clusters will lead to the radial velocity dispersion of the system. For instance, using the velocity dispersion observations from Leo I we show that the primordial black hole fraction f(PBH) greater than or similar to 2.0 x (1 M-circle dot/m(PBH))(2) is ruled out at a 99.99% confidence level. This method yields the most stringent limits on the PBH abundance at the mass scales similar to(1 - 10(3)) M-circle dot and tightly constrains the primordial origin of gravitational wave events observed by the LIGO experiments.

引用

页数：6

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