Spectral gamma-ray signatures of cosmological dark matter annihilations -: art. no. 251301

被引：149

作者：

Bergström, L

Edsjö, J

Ullio, P

机构：

[1] Stockholm Univ, SCFAB, Dept Phys, SE-10691 Stockholm, Sweden

[2] SISSA, I-34014 Trieste, Italy

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.87.251301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose a new signature for weakly interacting massive particle (WIMP) dark matter, a spectral feature in the diffuse extragalactic gamma-ray radiation. This feature, a sudden drop of the gamma-ray intensity at an energy corresponding to the WIMP mass, comes from the asymmetric distortion of the line due to WIMP annihilation into two gamma rays caused by the cosmological redshift. Unlike other proposed searches for a line signal, this method is not very sensitive to the exact dark matter density distribution in halos and subhalos.

引用

页码：251301 / 1

页数：4

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