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arXiv 0808.0481astro-ph
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皮埃尔俄歇天文台探测到的与超高能宇宙射线相关的附近活动星系的物理条件

Physical conditions in nearby active galaxies correlated with ultra-high-energy cosmic rays detected by the Pierre Auger Observatory

Sergey Gureev, Sergey Troitsky

摘要:

我们分析了2007年皮埃尔·俄歇合作组织(Pierre Auger Collaboration)报告的活动星系相关性。如果使用相关函数方法(计算所有“源-事件”对,而不仅仅是“最近邻”),则信号减小,这表明相关性可能揭示单个源,而不是它们的总体。我们分析了现有的数据在这些个别相关的源的物理条件,并得出结论,质子的加速到所观察到的能量是几乎不可能在这些星系中的任何一个,而较重的核将被银河系磁场偏转,从而破坏了相关性。我们的结果质疑俄歇解释的各向异性信号,但不矛盾,其解释与中等质量的核加速在Cen A。

英文摘要:

We analyze the active-galaxy correlation reported in 2007 by the Pierre Auger Collaboration. The signal diminishes if the correlation-function approach (counting all "source-event" pairs and not only "nearest neighbours") is used, suggesting that the correlation may reveal individual sources and not their population. We analyze available data on physical conditions in these individual correlated sources and conclude that acceleration of protons to the observed energies is hardly possible in any of these galaxies, while heavier nuclei would be deflected by the Galactic magnetic field thus spoiling the correlation. Our results question the Auger interpretation of the reported anisotropy signal but do not contradict to its explanation with intermediate-mass nuclei accelerated in Cen A.

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