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arXiv 1209.0353astro-ph.HE
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费米大面阵望远镜观测的超高能宇宙射线与活动星系核的关联

Correlation between Ultra-high Energy Cosmic Rays and Active Galactic Nuclei from Fermi Large Area Telescope

Jihyun Kim, Hang Bae Kim

摘要:

通过对$γ$射线强活动星系核(AGN)位置与超高能宇宙射线(UHECR)到达方向的相关性分析,研究了活动星系核(AGN)是UHECR源的可能性。我们利用第二代Fermi大区域望远镜AGN星表中的$γ$射线强活动星系核和$d\le 100 {\rm Mpc}$,以及Pierre Auger天文台的UHECR观测数据和$E\ge 55 {\rm EeV}$。利用相关角距分布和Kolmogorov-Smirnov检验,将$γ$射线强活动星系核的到达方向分布与观测到的UHECR的到达方向分布进行了比较。我们的结论是,假设的$γ$ -射线响亮AGN的主要来源的UHECR是不利的,除非有一个大的涂抹效应,由于星系际磁场。

英文摘要:

We study the possibility that the $γ$-ray loud active galactic nuclei (AGN) are the sources of ultra-high energy cosmic rays (UHECR), through the correlation analysis of their locations and the arrival directions of UHECR. We use the $γ$-ray loud AGN with $d\le 100 {\rm Mpc}$ from the second Fermi Large Area Telescope AGN catalog and the UHECR data with $E\ge 55 {\rm EeV}$ observed by Pierre Auger Observatory. The distribution of arrival directions expected from the $γ$-ray loud AGN is compared with that of the observed UHECR using the correlational angular distance distribution and the Kolmogorov-Smirnov test. We conclude that the hypothesis that the $γ$-ray loud AGN are the dominant sources of UHECR is disfavored unless there is a large smearing effect due to the intergalactic magnetic fields.

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