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arXiv 1012.4562astro-ph.HE
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cosmic ray能谱中的膝关节:脉冲星/超新星起源?

The knee in the cosmic ray energy spectrum: a pulsar/supernova origin?

Tadeusz Wibig, Arnold W. Wolfendale

摘要:

宇宙射线能谱中几个PeV能量处突出的“膝盖”的起源仍然不确定。然而,最近的一种机制显示出了希望;这涉及来自非常年轻的脉冲星的粒子与来自非常年轻的超新星遗迹的辐射场相互作用。随后粒子与光子通过产生e+e-的方式发生核反应,从而引起特征拐点。在早期的一篇论文中,我们认为,如果要解释光谱形状,该机制将意味着只有一种非常罕见的来源。在这里,我们更详细地研究了这一机制,并得出结论,即使是一个单一的源工作,它的特性也需要如此不寻常,以至于这种机制对于任何已知类型的脉冲星-超新星组合都是不可能的。

英文摘要:

The origin of the prominent 'knee' in the cosmic ray energy spectrum at an energy of several PeV is still uncertain. A recent mechanism has shown promise, however; this involves particles from a very young pulsar interacting with the radiation field from a very young supernova remnant. The ensuing nuclear reaction of the particles with the photons by way of e+e- production then causes the characteristic knee. In an earlier paper we argued that the mechanism would imply only one source of a very rare type - if it were to explain the spectral shape. Here we examine the mechanism in more detail and conclude that for even a single source to work its characteristics would need to be so unusual that the mechanism would not be possible for any known type of pulsar-supernova combination.

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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