来自信噪比的宇宙射线的起源:第一次直接证明后的确认和挑战

M. Cardillo , M. Tavani , A. Giuliani
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引用次数: 5

摘要

到目前为止,提供宇宙射线(CR)起源的实验明确证据一直是难以捉摸的。超新星遗迹(SNR)研究表明,随着理论模型的不断完善,情况越来越复杂。中年超新星遗迹(SNR) W44最近引起了人们的关注,因为它与银河系宇宙射线的起源有关。伽玛射线任务AGILE和费米首次建立了信噪比低于200 MeV的光谱连续体,这可以归因于中性介子发射。我们的工作重点是对W44中所有可用的粒子加速数据和模型进行全球重新评估,我们的分析加强了以前对W44复杂环境的研究和观测,为更详细的建模提供了新的信息。然而,在确定了伽玛射线发射的强子性质之后,在信噪比中CR加速的背景下,仍有许多理论挑战有待解决。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The origin of Cosmic-Rays from SNRs: confirmations and challenges after the first direct proof

Until now, providing an experimental unambiguous proof of Cosmic Ray (CR) origin has been elusive. The SuperNova Remnant (SNR) study showed an increasingly complex scenario with a continuous elaboration of theoretical models. The middle-aged supernova remnant (SNR) W44 has recently attracted attention because of its relevance regarding the origin of Galactic cosmic-rays. The gamma-ray missions AGILE and Fermi have established, for the first time for a SNR, the spectral continuum below 200 MeV which can be attributed to neutral pion emission. Our work is focused on a global re-assessment of all available data and models of particle acceleration in W44 and our analysis strengthens previous studies and observations of the W44 complex environment, providing new information for a more detailed modeling. However, having determined the hadronic nature of the gamma-ray emission on firm ground, a number of theoretical challenges remains to be addressed in the context of CR acceleration in SNRs.

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