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arXiv 1108.4565astro-ph.HE
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Cen A作为γ-和UHE cosmic-ray来源

Cen A as gamma- and UHE cosmic-ray Source

F. M. Rieger

摘要:

Cen A最近被Fermi-LAT和H.E.S.S.在高能(HE)和甚高能(VHE)γ射线域探测到。我们回顾了所观察到的特性,并提出了一个方案,VHE发射起源于附近的黑洞。出于一些超高能(UHE)宇宙线(CR)事件与Cen A的可能关联,我们进一步分析了一些机制(包括冲击和随机加速)的加速效率,表明其中大多数(除了剪切)在加速质子超过几个$10^{19}$ eV有严重的困难。

英文摘要:

Cen A has been recently detected in the high-energy (HE) and very high energy (VHE) gamma-ray domain by Fermi-LAT and H.E.S.S. We review the observed characteristics and suggest a scenario where the VHE emission originates from the vicinity of the black hole. Motivated by the possible association of some ultra-high energy (UHE) cosmic ray (CR) events with Cen A, we further analyze the acceleration efficiency for a number of a mechanisms (including shock and stochastic acceleration), showing that most of them (apart perhaps from shear) have serious difficulties in accelerating protons beyond a few $10^{19}$ eV.

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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