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arXiv 1907.06207astro-ph.HEhep-ph
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从恒星爆发产生的超高能宇宙射线看银河系磁场

The Galactic magnetic field in the light of starburst-generated ultrahigh-energy cosmic rays

Jorge F. Soriano, Luis A. Anchordoqui, Diego F. Torres

摘要:

俄歇数据显示了超高能宇宙射线(UHECR)和附近星暴星系之间相关性的证据。这种有趣的相关性与望远镜阵列收集的数据是一致的,这些数据揭示了距离星暴星系M82不远的到达方向上的一个更明显的方向性“热点”。在这项工作中,我们假设恒星爆发的源UHECR和调查的前景,使用观测到的分布UHECR到达方向来约束银河系磁场模型。我们表明,如果望远镜阵列的热点确实起源于M82,UHECR数据将放置一个强有力的约束相干和湍流分量的银河系磁场。

英文摘要:

Auger data show evidence for a correlation between ultrahigh-energy cosmic rays (UHECRs) and nearby starburst galaxies. This intriguing correlation is consistent with data collected by the Telescope Array, which have revealed a much more pronounced directional ``hot spot'' in arrival directions not far from the starburst galaxy M82. In this work, we assume starbursts are sources of UHECRs and investigate the prospects to use the observed distribution of UHECR arrival directions to constrain Galactic magnetic field models. We show that if the Telescope Array hot spot indeed originates from M82, UHECR data would place a strong constraint on the coherent and turbulent components of the Galactic magnetic field.

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