Can proper motions of dark-matter subhalos be detected?

被引：21

作者：

Ando, Shin'ichiro ^{[1
]}

Kamionkowski, Marc ^{[1
]}

Lee, Samuel K. ^{[1
]}

Koushiappas, Savvas M. ^{[2
]}

机构：

[1] CALTECH, Pasadena, CA 91125 USA

[2] Brown Univ, Dept Phys, Providence, RI 02912 USA

来源：

PHYSICAL REVIEW D | 2008年 / 78卷 / 10期

关键词：

D O I：

10.1103/PhysRevD.78.101301

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

One of the goals of NASA's Fermi Gamma-ray Space Telescope (formerly GLAST) will be the detection of gamma rays from dark-matter annihilation in the Galactic halo. Theoretical arguments suggest that dark matter may be bound into subhalos with masses as small as 10(-4)-10(2)M(circle plus). If so, it may be possible to detect individual subhalos as point sources in the Fermi Telescope. It has further been argued that some of these point sources may exhibit proper motions. Here we show that upper limits to the diffuse gamma-ray background constrain the number of subhalos close enough to exhibit proper motions to be less than one.

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页数：4

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