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arXiv 1607.00380astro-ph.HE
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来自星系团源的高能中微子

High-energy neutrinos from sources in clusters of galaxies

Ke Fang, Angela V. Olinto

摘要:

高能宇宙射线可以在星系团中被加速,在大尺度结构形成过程中气体吸积引起的兆秒差距尺度的冲击,或者被星系团中的强大源加速。一旦加速,最高能量的粒子以几乎直线的轨迹离开星团,而较低能量的粒子则可以被星团磁场限制到宇宙时间,并与星团内的气体相互作用。利用团簇中重子分布和湍流磁场的实际模型,研究了高能质子在团簇内介质中的传输和强子相互作用。我们报告的累积宇宙射线和中微子光谱产生的星系团,包括嵌入式源,并证明集群可以贡献一个显着的比例观察到的冰立方中微子超过30 TeV,而在高能宇宙射线和$γ$射线的合理选择的参数和源的情况下,保持未检测到。

英文摘要:

High-energy cosmic rays can be accelerated in clusters of galaxies, by mega-parsec scale shocks induced by accretion of gas during the formation of large-scale structure, or by powerful sources harbored in clusters. Once accelerated, the highest energy particles leave the cluster via almost rectilinear trajectories, while lower energy ones can be confined by the cluster magnetic field up to cosmological time and interact with the intracluster gas. Using a realistic model of the baryon distribution and the turbulent magnetic field in clusters, we studied the propagation and hadronic interaction of high-energy protons in the intracluster medium. We report the cumulative cosmic ray and neutrino spectra generated by galaxy clusters including embedded sources, and demonstrate that clusters can contribute a significant fraction of the observed IceCube neutrinos above 30 TeV while remaining undetected in high-energy cosmic rays and $γ$ rays for reasonable choices of parameters and source scenarios.

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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