一种超高能宇宙射线簇
天体物理学
2007-05-23 v2 高能物理 - 唯象学
摘要
分析了来自 AGASA 和 HiRes 综合数据中五个超高能宇宙射线,以检验它们是否来自单个来源。对于超过 37 EeV 的四个事件,在 94 个高能数据集中可在不考虑磁场色散的情况下进行分析。其为随机关联的概率为 10^-3。假设该来源为持续性,来自其来源沿途积累的随机磁场偏转可用于估计 \sqrt{B^2 \lambda D} ~ 1 nG-Mpc。包括一场来自 HiRes 的事件,其能量在 10 到 30 EeV 之间,与该值相符。银河磁场偏转似乎小于某些模型中所述的。
引用
@article{arxiv.astro-ph/0501388,
title = {A Cluster of Ultrahigh Energy Cosmic Rays},
author = {Glennys R. Farrar},
journal= {arXiv preprint arXiv:astro-ph/0501388},
year = {2007}
}
备注
Reformatted as AASTex preprint; 12 pp. An obvious but serious typo in the units of the field-strength constraint is corrected. Chance probability estimates are updated with results of more extensive Monte Carlo simulations, strengthening conclusions. Clarity of the text is improved, treatment of galactic magnetic deflection is generalized, and some other points are elaborated