费米LAT暗物质弥散Gamma-Ray背景中的各向异性
Anisotropies in the Diffuse Gamma-Ray Background from Dark Matter with Fermi LAT: a closer look
摘要：
我们进行了详细的研究各向同性伽马射线背景（IGRB）的费米大面积望远镜（Fermi-LAT）测量的各向异性相关的暗物质（DM）湮灭的灵敏度。这是第一次，我们考虑到银河前景的影响，并使用费米-LAT的现实表示。我们认为DM各向异性的银河系外的起源和银河系的起源（这可以通过在银河系的子结构湮灭产生），而不是背景的各向异性产生的天体物理起源的来源，耀变体，例如。我们发现，从5年的观测统计费米是敏感的DM贡献的水平上的热遗迹截面取决于DM质量和湮灭模式。用于DM搜索的各向异性方法具有与仅基于能谱的通常方法相当的灵敏度，因此在DM难题中构成了独立和互补的信息。（节略）
英文摘要：
We perform a detailed study of the sensitivity to the anisotropies related to Dark Matter (DM) annihilation in the Isotropic Gamma-Ray Background (IGRB) as measured by the Fermi Large Area Telescope (Fermi-LAT). For the first time, we take into account the effects of the Galactic foregrounds and use a realistic representation of the Fermi-LAT. We consider DM anisotropies of extra-galactic origin and of Galactic origin (which can be generated through annihilation in the Milky Way sub-structures) as opposed to a background of anisotropies generated by sources of astrophysical origin, blazars for example. We find that with statistics from 5 years of observation Fermi is sensitive to a DM contribution at the level of the thermal-relic cross section depending on the DM mass and annihilation mode. The anisotropy method for DM searches has a sensitivity comparable to the usual methods based only on the energy spectrum and thus constitutes an independent and complementary piece of information in the DM puzzle. (abridged)
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