arXiv 0811.08362008-11-05astro-ph

Gamma Ray天文学与银河系宇宙射线的起源

Gamma Ray Astronomy and the Origin of Galactic Cosmic Rays

Stefano Gabici

备注：: Invited review talk, to appear in the Proceedings of the XXI European Cosmic Ray Symposium

摘要：

扩散冲击波加速作用于膨胀的超新星残骸壳层，是目前最流行的银河系宇宙射线起源模型。尽管这个模型得到了普遍的共识，但超新星遗迹假说的明确和确凿的证据仍然缺失。在这方面，伽马射线天文学的最新发展为我们提供了对银河宇宙射线起源问题的宝贵见解，因为在超新星遗迹激波加速宇宙射线的过程中以及随后在星际介质中传播的过程中，预计都会产生伽马射线。特别是，最近探测到的一些TeV能量的超新星遗迹很好地符合这个模型，但它仍然没有构成一个决定性的证据，主要是由于难以解开强子和轻子对观测到的伽马射线发射的贡献。本文简要总结了伽马射线天文学中与宇宙射线有关的最重要的结果，并讨论了未来伽马射线观测对最终解决宇宙射线起源问题的可预见的贡献。

英文摘要：

Diffusive shock acceleration operating at expanding supernova remnant shells is by far the most popular model for the origin of galactic cosmic rays. Despite the general consensus received by this model, an unambiguous and conclusive proof of the supernova remnant hypothesis is still missing. In this context, the recent developments in gamma ray astronomy provide us with precious insights into the problem of the origin of galactic cosmic rays, since production of gamma rays is expected both during the acceleration of cosmic rays at supernova remnant shocks and during their subsequent propagation in the interstellar medium. In particular, the recent detection of a number of supernova remnants at TeV energies nicely fits with the model, but it still does not constitute a conclusive proof of it, mainly due to the difficulty of disentangling the hadronic and leptonic contributions to the observed gamma ray emission. In this paper, the most relevant cosmic-ray-related results of gamma ray astronomy are briefly summarized, and the foreseeable contribution of future gamma ray observations to the final solution of the problem of cosmic ray origin is discussed.

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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