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arXiv 2108.09078astro-ph.HE
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切伦科夫望远镜阵列对来自银河系中心的暗物质信号的灵敏度

Sensitivity of the Cherenkov Telescope Array to a dark matter signal from the Galactic centre

Christopher Eckner

摘要:

高能伽马射线是约束或揭示暗物质,特别是弱相互作用大质量粒子的性质的有希望的工具。切伦科夫望远镜阵列(CTA)已经进入建造前阶段,不久将在20 GeV - 300 TeV的能量范围内探测天空。由于其改进的能量和角分辨率以及与当前一代切伦科夫望远镜相比显着更大的有效面积,CTA有望探测更重的暗物质,具有前所未有的灵敏度,达到约1 TeV的热湮灭截面。这次演讲将总结CTA计划的暗物质搜索策略,重点是来自银河系中心的信号。正如费米LAT在较低能量下所观察到的那样,这个区域相当复杂,CTA将是第一个对该区域大尺度弥漫天体物理发射敏感的地面天文台。我们报告的合作努力,以研究这种扩展的天体物理背景的影响,对暗物质搜索,费米-LAT数据的基础上,以指导我们的观测策略,考虑到各种来源的系统不确定性。

英文摘要:

High-energy gamma rays are promising tools to constrain or reveal the nature of dark matter, in particular Weakly Interacting Massive Particles. Being well into its pre-construction phase, the Cherenkov Telescope Array (CTA) will soon probe the sky in the 20 GeV - 300 TeV energy range. Thanks to its improved energy and angular resolutions as well as significantly larger effective area when compared to the current generation of Cherenkov telescopes, CTA is expected to probe heavier dark matter, with unprecedented sensitivity, reaching the thermal annihilation cross-section at ~1 TeV. This talk will summarise the planned dark matter search strategies with CTA, focusing on the signal from the Galactic centre. As observed with the Fermi LAT at lower energies, this region is rather complex and CTA will be the first ground-based observatory sensitive to the large scale diffuse astrophysical emission from that region. We report on the collaboration effort to study the impact of such extended astrophysical backgrounds on the dark matter search, based on Fermi-LAT data in order to guide our observational strategies, taking into account various sources of systematic uncertainty.

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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