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arXiv 1111.5781astro-ph.HE
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使用HESS搜索暗物质朝向矮球状星系

Dark Matter searches with H.E.S.S. towards dwarf spheroidal galaxies

A. Viana

摘要:

H.E.S.S.实验是在南半球的四个相同的成像大气切伦科夫望远镜阵列,旨在观察非常高的能量伽马射线(E > 100 GeV)。这些高能伽马射线可用于在稠密环境中寻找暗物质粒子的湮灭。矮星系动力学表明它们是暗物质主导的环境。H.E.S.S.对银河系的矮卫星星系进行了几次观测活动。对观察结果进行了审查。在没有明确信号的情况下,暗物质粒子湮灭截面的约束条件已经在不同的粒子物理场景中推导出来。研究了γ射线通量的一些可能的增强,即,索末菲效应、内部韧致辐射和暗物质晕中的子结构。

英文摘要:

The H.E.S.S. experiment is an array of four identical imaging atmospheric Cherenkov telescopes in the Southern hemisphere, designed to observe very high energy gamma-rays (E > 100 GeV). These high energy gamma-rays can be used to search for annihilations of Dark Matter particles in dense environments. Dwarf galaxy dynamics shows that they are Dark Matter-dominated environments. Several observation campaigns on dwarf satellite galaxies of the Milky Way were launched by H.E.S.S.. The observations are reviewed. In the absence of clear signals, constraints on the Dark Matter particle annihilation cross-section have been derived in different particle physics scenarios. Some possible enhancements of the gamma-ray flux are studied, i.e., the Sommerfeld effect, the internal bremsstrahlung and the substructures in the Dark Matter halo.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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