The origin of Cosmic-Rays from SNRs: confirmations and challenges after the first direct proof

Nuclear physics. B, Proceedings, supplements Pub Date : 2014-11-01 DOI:10.1016/j.nuclphysbps.2014.10.007

M. Cardillo , M. Tavani , A. Giuliani

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引用次数: 5

Abstract

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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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

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。

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Nuclear physics. B, Proceedings, supplements

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Contents Editorial Board Author index Hybrid Simulations of Particle Acceleration at Shocks Using optical lines to study particle acceleration at supernova remnants