Monte Carlo Bayesian search for the plausible source of the Telescope Array hotspot

Monte Carlo Bayesian search for the plausible source of the Telescope Array hotspot
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蒙特卡罗贝叶斯搜索望远镜阵列热点的合理来源

DOI:
10.1103/physrevd.93.043011
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发表时间:
2014-11
期刊:
影响因子:
5
通讯作者:
Fan Yi-Zhong
Fan Yi-Zhong
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
He Hao-Ning;Kusenko Alex;er;Nagataki Shigehiro;Zhang Bin-Bin;Yang Rui-Zhi;Fan Yi-Zhong

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望远镜阵列(TA)合作报告了19个超高能宇宙射线(UHECR)的热点。使用一个通用的模型与一个源和能量依赖的磁偏转,我们表明,TA热点事件的分布与一个单一的源假设是一致的,虽然不能排除多个源。该分布由均匀分布产生的机会概率为0.2。我们描述了一种蒙特卡罗贝叶斯(MCB)推断方法,它可以用来推导出磁场的参数以及源坐标,我们将这种方法应用到TA热点数据,推断出可能的源的位置。我们讨论了同样的方法对未来数据的可能应用。
The Telescope Array (TA) collaboration has reported a hotspot of 19 ultrahigh-energy cosmic rays (UHECRs). Using a universal model with one source and energy-dependent magnetic deflections, we show that the distribution of the TA hotspot events is consistent with a single source hypothesis, although multiple sources cannot be ruled out. The chance probability of this distribution arising from a homogeneous distribution is $0.2\%$. We describe a Monte Carlo Bayesian (MCB) inference approach, which can be used to derive parameters of the magnetic fields as well as the source coordinates, and we apply this method to the TA hotspot data, inferring the location of the likely source. We discuss possible applications of the same approach to future data.
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