用H.E.S.S.S.进行宇宙射线电子光谱的高统计测量
F Aharonian1,2,3, F Ait Benkhali4, J Aschersleben5
1Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2, Ireland.
Physical review letters
|December 13, 2024
概括
高能宇宙射线电子和质子 (CRe) 被测量到40 TeV. 频谱显示1 TeV左右的断裂,为附近的加速器和暗物质提供了约束.
科学领域:
- 天体物理学 天体物理学
- 粒子物理学 粒子物理学
- 宇宙射线物理学 宇宙射线物理学
背景情况:
- 非常高能量的宇宙射线电子和质子 (CRe) 对于探测局部加速器至关重要.
- 它们的快速冷却限制了传播,使它们成为对附近源的敏感探测器,以及像暗物质消灭这样的奇特物理.
- 了解CRe光谱可以了解天体物理过程和基本物理.
研究的目的:
- 展示从0.3到40 TeV的宇宙射线电子和正电子光谱的高统计测量.
- 寻找可能表明附近的CRe加速器或异国情调的生产机制的光谱特征.
- 为了限制CRe传播和潜在的暗物质信号的模型.
主要方法:
- 使用了高能立体系统 (H.E.S.S.) 用于数据收集.
- 实现了超过10^4.4的质子排斥功率.
- 分析了两个数量级的能量中的CRe光谱.
主要成果:
- 从0.3到40 TeV的测量CRe频谱被一个破碎的功率定律描述得很好.
- 在1TeV左右观察到光谱断裂,光谱指数从3.25±0.02±0.2±sys) 变为4.49±0.04±0.2±sys).
- 在多TeV能量下没有发现其他明显的光谱特征.
结论:
- 观测到的光谱断裂提供了关于局部宇宙射线源的能量频谱的信息.
- 缺乏额外的特征限制了附近的CRe加速器和奇特的传播模型的存在.
- 结果限制了暗物质灭绝场景的局限性,这些场景有助于局部CRe流动.
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