Constraints on the dark matter annihilation scenario of Fermi 130 GeV gamma-ray line emission by continuous gamma-rays, Milky Way halo, galaxy clusters and dwarf galaxies observations

被引：53

作者：

Huang, Xiaoyuan ^{[1
]}

Yuan, Qiang ^{[2
,3
]}

Yin, Peng-Fei ^{[2
]}

Bi, Xiao-Jun ^{[2
]}

Chen, Xuelei ^{[1
]}

机构：

[1] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China

[2] Chinese Acad Sci, Key Lab Particle Astrophys, Inst High Energy Phys, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2012年 / 11期

基金：

中国国家自然科学基金;

关键词：

dark matter theory; gamma ray experiments; NEUTRALINO ANNIHILATION; PROJECT;

D O I：

10.1088/1475-7516/2012/11/048

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

It was recently reported that there may exist monochromatic gamma-ray emission at similar to 130 GeV from the Galactic center in the Fermi Large Area Telescope data, which might be related with dark matter (DM) annihilation. In this work we carry out a comprehensive check of consistency of the results with the DM annihilation scenario, using the 3.7 yrs Fermi observation of the inner Galaxy, Galactic halo, clusters of galaxies and dwarf galaxies. The results found are as follows. 1) Very strong constraints on the DM annihilation into continuous similar to-rays from the Galactic center are set, which are as stringent as the "natural" scale assuming thermal freeze-out of DM. Such limit sets strong constraint on the DM models to explain the line emission. 2) No line emission from the Galactic halo is found in the Fermi data, and the constraints on line emission is marginally consistent with the DM annihilation interpretation of the similar to 130 GeV line emission from the inner Galaxy. 3) No line emission from galaxy clusters and dwarf galaxies is detected, although possible concentration of photons from clusters in 120-140GeV is revealed. The constraints from clusters and dwarf galaxies are weak and consistent with the DM annihilation scenario to explain the similar to 130 GeV line emission.

引用

页数：16

共 59 条

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