Possible evidence for MeV dark matter in dwarf spheroidals

被引：64

作者：

Hooper, D ^{[1
]}

Ferrer, F

Boehm, C

Silk, J

Paul, J

Evans, NW

Casse, M

机构：

[1] Univ Oxford, Dept Astrophys, Oxford OX1 3RH, England

[2] Inst Astrophys, F-75014 Paris, France

[3] CEA Saclay, DSM, DAPNIA, Serv Astrophys, F-91191 Gif Sur Yvette, France

[4] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.93.161302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The observed 511 keV emission from the galactic bulge could be due to very light (MeV) annihilating dark matter particles. To distinguish this hypothesis from conventional astrophysical sources, we study dwarf spheroidals in the region observed by the International Gamma-Ray Astrophysics Laboratory/SPI such as Sagittarius. As these galaxies have comparatively few stars, the prospects for 511 keV emission from standard astrophysical scenarios are minimal. The dwarf spheroidals do, however, contain copious amounts of dark matter. The observation of 511 keV emission from Sagittarius should be a "smoking gun" for MeV dark matter.

引用

页码：161302 / 1

页数：4

共 43 条

[1] The large-scale bipolar wind in the Galactic center [J].