Dark matter annihilation: The origin of cosmic gamma-ray background at 1-20 MeV

被引：52

作者：

Ahn, K ^{[1
]}

Komatsu, E ^{[1
]}

机构：

[1] Univ Texas, Dept Astron, Austin, TX 78712 USA

来源：

PHYSICAL REVIEW D | 2005年 / 72卷 / 06期

关键词：

D O I：

10.1103/PhysRevD.72.061301

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The origin of the cosmic gamma-ray background at 1-20 MeV remains a mystery. We show that gamma-ray emission accompanying annihilation of 20 MeV dark-matter particles explains most of the observed signal. Our model satisfies all of the current observational constraints, and naturally provides the origin of "missing" gamma-ray background at 1-20 MeV and 511 keV line emission from the Galactic center. We conclude that gamma-ray observations support the existence of 20 MeV dark-matter particles. Improved measurements of the gamma-ray background in this energy band undoubtedly test our proposal.

引用

页数：5

共 40 条

[1] Cosmological lower bound on dark matter masses from the soft gamma-ray background [J].