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arXiv 2108.09348astro-ph.HE
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天鹅座超气泡中的粒子加速

Particle Acceleration in the Cygnus Superbubble

B. Hona

摘要:

天鹅座茧是第一个由大质量恒星协会OB2协会提供动力的伽马射线超级气泡。据推测,OB 2星协所有大质量O型恒星的星风的综合效应可以将茧中的宇宙射线加速到PeV能量。在茧中加速到PeV能量的确凿证据将确定恒星协会是PeV宇宙射线加速器,称为PeVatron。然而,茧以前只研究了高达10 TeV。在这篇文章中,使用1343天的高海拔水切伦科夫(HAWC)观测数据,我们提出了形态和光谱的茧超过1 TeV的超过100 TeV的研究。在更高的TeV能量的分析揭示了一个更软的频谱相比,GeV的伽马射线观测。这一结果表明,加速器的效率降低了数百TeV,或者在加速后,最高能量的质子逃离了该区域。这里介绍的10 TeV以上的研究演示了CR加速器如何在这些极端能量下运行,以及粒子传输如何影响高能发射。

英文摘要:

The Cygnus Cocoon is the first gamma-ray superbubble powered by a massive stellar association, the OB2 association. It was postulated that the combined effects of the stellar winds of all the massive O-type stars of the OB2 association can accelerate the cosmic rays to PeV energy in the Cocoon. The conclusive proof of acceleration to PeV energy in the Cocoon will identify the stellar association as a PeV cosmic-ray accelerator, known as PeVatron. However, the Cocoon has been previously studied only up to 10 TeV. In this contribution, using 1343 days of High Altitude Water Cherenkov (HAWC) observatory data, we present the morphological and spectral study of the Cocoon above 1 TeV to beyond 100 TeV. The analysis at higher TeV energies reveals a softer spectrum compared to the GeV gamma-ray observation. This result suggests that the accelerator's efficiency decreases around hundreds of TeV, or after being accelerated, the highest-energy protons escape the region. The study above 10 TeV presented here demonstrates how CR accelerators operate in these extreme energies and how particle transport impacts high-energy emission.

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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