PMO OpenIR  > 分子云与恒星形成研究团组
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 
Xiaoyuan Huang ; Qiang Yuan ; Peng-Fei Yin ; Xiao-Jun Bi ; Xuelei Chen
2012
发表期刊Journal of Cosmology and Astroparticle Physics
卷号2012
摘要It was recently reported that there may exist monochromatic $\gamma$-ray emission at $\sim 130$ 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 $\gamma$-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 $\sim 130$ 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 120-140 GeV is revealed. The constraints from clusters and dwarf galaxies are weak and consistent with the DM annihilation scenario to explain the $\sim 130$ GeV line emission.
学科领域Astronomy & Astrophysics
文献类型期刊论文
条目标识符http://libir.pmo.ac.cn/handle/332002/8023
专题分子云与恒星形成研究团组
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Xiaoyuan Huang,Qiang Yuan,Peng-Fei Yin,et al. 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 [J]. Journal of Cosmology and Astroparticle Physics,2012,2012.
APA Xiaoyuan Huang,Qiang Yuan,Peng-Fei Yin,Xiao-Jun Bi,&Xuelei Chen.(2012).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 .Journal of Cosmology and Astroparticle Physics,2012.
MLA Xiaoyuan Huang,et al."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 ".Journal of Cosmology and Astroparticle Physics 2012(2012).
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