宇宙线大尺度各向异性的分析方法
发布时间：2019-02-23 13:46
【摘要】：模拟研究了2种基于等天顶角方法的全天区扫描方法.一种是已经应用于全天区搜寻γ源的传统普通等天顶角方法,一种是基于等天顶角方法的χ2拟合方法.从模拟结果看,二者之间存在着不可忽视的差异,前一种方法在分析存在大尺度各向异性的宇宙线样本时不能正确反映各向异性的真实现象,而后一种方法分析结果能够正确反映真实物理现象,但是由于受到构造χ2方程的限制使得分析全天区宇宙线分布时在时间尺度上受到限制(视实验探测器数据统计量大小而定).最后,对比了这2种方法各自的优缺点.
[Abstract]:Two methods based on equal zenith angle are simulated and studied. One is the traditional isopause angle method, which has been applied to search gamma-ray sources in the whole sky region, and the other is the 蠂 ~ 2 fitting method based on the equal zenith angle method. From the simulation results, there is a noticeable difference between the two methods. The former method can not accurately reflect the true phenomenon of anisotropy in the analysis of cosmic ray samples with large-scale anisotropy. The results of the latter method can accurately reflect the real physical phenomena. However, due to the limitation of the construction of 蠂 ~ 2 equation, the analysis of cosmic ray distribution in the whole sky area is limited on a time scale (depending on the statistical value of the experimental data). Finally, the advantages and disadvantages of the two methods are compared.
【作者单位】： 西藏大学宇宙线教育部重点实验室;西藏大学理学院物理系;河北师范大学物理科学与信息工程学院;
【基金】：国家自然科学基金(11165013) 西藏大学青年科研培育基金(ZDPJZK201204)
【分类号】：P172.4
[Abstract]:Two methods based on equal zenith angle are simulated and studied. One is the traditional isopause angle method, which has been applied to search gamma-ray sources in the whole sky region, and the other is the 蠂 ~ 2 fitting method based on the equal zenith angle method. From the simulation results, there is a noticeable difference between the two methods. The former method can not accurately reflect the true phenomenon of anisotropy in the analysis of cosmic ray samples with large-scale anisotropy. The results of the latter method can accurately reflect the real physical phenomena. However, due to the limitation of the construction of 蠂 ~ 2 equation, the analysis of cosmic ray distribution in the whole sky area is limited on a time scale (depending on the statistical value of the experimental data). Finally, the advantages and disadvantages of the two methods are compared.
【作者单位】： 西藏大学宇宙线教育部重点实验室;西藏大学理学院物理系;河北师范大学物理科学与信息工程学院;
【基金】：国家自然科学基金(11165013) 西藏大学青年科研培育基金(ZDPJZK201204)
【分类号】：P172.4
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