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arXiv 0809.0734astro-ph
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活动星系核的宇宙射线

Cosmic rays from active galactic nuclei

E. G. Berezhko

摘要:

研究了活动星系核(AGN)周围的膨胀茧产生的激波对宇宙线(CR)的加速作用。结果表明,在能量$10^{18}$ eV以上,AGN演化过程中产生并在星系际空间释放的CRs的总能谱具有$N\propto ε^{-γ}$的形式,$γ\approx 2.6$则延伸到$ε_{max}\sim 10^{20}$ eV。得出结论,茧冲击被认为是河外CR的主要来源,它与银河系超新星遗迹一起提供了观测到的CR谱。

英文摘要:

Cosmic ray (CR) acceleration at the shock created by the expanding cocoons around active galactic nuclei (AGNs) is studied. It is shown that above the energy $10^{18}$ eV the overall energy spectrum of CRs, produced during the AGN evolution and released in the intergalactic space, has the form $N\propto ε^{-γ}$, with $γ\approx 2.6$, which extends up to $ε_{max}\sim 10^{20}$ eV. It is concluded that cocoons shocks have to be considered as a main source of extragalactic CRs, which together with Galactic supernova remnants provide the observed CR spectrum.

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