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Numerical Study of Propagation of UHECRs: Spectrum, Arrival Direction, Composition

机译：UHECRS传播的数值研究：光谱，到达方向，组成

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In this paper, simulations of propagation of UHE-protons from nearby galaxies are presented. We found goodparameter sets to explain the arrival distribution of UHECRs reported by AGASA and the energy spectrum reported byHiRes. Using a good parameter set, we demonstrated what distribution of arrival direction of UHECRs will be as afunction of event numbers. We show that 1000-10000 events are necessary to clearly see the source distribution. We alsoshowed that effects of interactions and trapping of UHE-Nuclei in a galaxy cluster are very important. Especially, whena UHECR source is a bursting source such as a GRB/AGN flare, heavy UHE-Nuclei are trapped for a long time in thegalaxy cluster, which changes the spectrum and chemical composition of UHECRs coming from the galaxy cluster. Wealso showed that such effects can be important when there have been sources of UHE-Nuclei in the Milky Way. Sincelight nuclei escape from the Milky Way in a short timescale, the chemical composition of UHECRs observed at the Earthcan be heavy at the high-energy range as suggested by Auger.
机译：在本文中，从邻近星系UHE-质子的传播的模拟被呈现。我们发现goodparameter套解释UHECRs由AGASA报道和能谱报道byHiRes的到达分布。使用好的参数集，我们证明UHECRs的到达方向的分布会是怎样的事件数的机能缺失。我们发现，在1000〜10000周的活动是必要的，清晰的看到源代码分发。我们alsoshowed相互作用是影响和UHE-核的星系团俘获是非常重要的。特别是，whena UHECR源是破裂源，如GRB / AGN光晕，重UHE-核被困在thegalaxy簇，这改变了光谱和UHECRs从星系簇未来的化学组成的很长一段时间。 Wealso表明，这种影响可能是重要的，当出现了UHE-核的银河系来源。从银河在短时标Sincelight核逃逸，UHECRs的化学组成处的高能量的范围是Earthcan重观察到由俄歇的建议。

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