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arXiv 2108.03003astro-ph.HE
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用H.E.S.S观测到的年轻大质量星团Westerlund 1的$γ$射线

The young massive stellar cluster Westerlund 1 in $γ$ rays as seen with H.E.S.S

Lars Mohrmann, Andreas Specovius, Romed Rauth, Stefan Ohm, Christopher van Eldik

摘要:

大质量星团最近被假设为强子宇宙射线加速到PeV能量的候选者。此前,H.E.S.S.合作已经报道了非常扩展的$γ$射线发射围绕韦斯特伦德1,银河系中的一个巨大的年轻星团。在这篇文章中,我们提出了一个更新的分析,采用了一种新的分析技术,是基于一个更大的数据集,使我们能够更好地约束发射的形态和能谱。所使用的分析技术是三维似然分析,这是特别适合于很大程度上扩展的源。$γ$射线发射的起源将根据多波长观测结果进行讨论。

英文摘要:

Massive stellar clusters have recently been hypothesised as candidates for the acceleration of hadronic cosmic rays up to PeV energies. Previously, the H.E.S.S. Collaboration has reported about very extended $γ$-ray emission around Westerlund 1, a massive young stellar cluster in the Milky Way. In this contribution we present an updated analysis that employs a new analysis technique and is based on a much larger data set, allowing us to constrain better the morphology and the energy spectrum of the emission. The analysis technique used is a three-dimensional likelihood analysis, which is especially well suited for largely extended sources. The origin of the $γ$-ray emission will be discussed in light of multi-wavelength observations.

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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