Possibility of a Dark Matter Interpretation for the Excess in Isotropic Radio Emission Reported by ARCADE

被引：68

作者：

Fornengo, N. ^{[1
,2
]}

Lineros, R. ^{[3
]}

Regis, M. ^{[1
,2
]}

Taoso, M. ^{[3
]}

机构：

[1] Univ Turin, Dipartimento Fis Teor, I-10125 Turin, Italy

[2] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy

[3] Univ Valencia, CSIC, IFIC, Edificios Inst, E-46071 Valencia, Spain

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 27期

关键词：

LIGHT;

D O I：

10.1103/PhysRevLett.107.271302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The ARCADE 2 Collaboration has recently measured an isotropic radio emission which is significantly brighter than the expected contributions from known extra-galactic sources. The simplest explanation of such excess involves a "new'' population of unresolved sources which become the most numerous at very low (observationally unreached) brightness. We investigate this scenario in terms of synchrotron radiation induced by weakly interacting massive particle (WIMP) annihilations or decays in extra-galactic halos. Intriguingly, for light-mass WIMPs with a thermal annihilation cross section, the level of expected radio emission matches the ARCADE observations.

引用

页数：5

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