Large scale distribution of arrival directions of cosmic rays detected above $10^{18}$ eV at the Pierre Auger Observatory
Large scale distribution of arrival directions of cosmic rays detected above $10^{18}$ eV at the Pierre Auger Observatory
复制标题
皮埃尔·奥格天文台检测到的 10^{18}$ eV 以上宇宙射线到达方向的大尺度分布
DOI：
10.1088/0067-0049/203/2/34
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发表时间：
2012
影响因子：
1.4
通讯作者：
Pierre Auger Collaboration
中科院分区：
文献类型：
--
作者：
Pierre Auger Collaboration
本文对俄歇天文台1018 eV以上宇宙线到达方向分布的大尺度各向异性进行了全面的研究。这种搜索是作为一个函数的赤经和赤Ascension在1018 eV以上的几个能量范围内，并报告的偶极和四极系数。在系统的不确定性，没有显着偏离各向同性。假设任何宇宙线各向异性占主导地位的偶极子和四极矩在这个能量范围内，其振幅的上限。这些上限使我们能够挑战来自密集分布在银盘中的静止星系源的1018 eV以上的宇宙射线的起源，并向各个方向发射主要是轻粒子。天体粒子物理学;宇宙射线
A thorough search for large scale anisotropies in the distribution of arrival directions of cosmic rays detected above 1018 eV at the Pierre Auger Observatory is presented. This search is performed as a function of both declination and right ascension in several energy ranges above 1018 eV, and reported in terms of dipolar and quadrupolar coefficients. Within the systematic uncertainties, no significant deviation from isotropy is revealed. Assuming that any cosmic ray anisotropy is dominated by dipole and quadrupole moments in this energy range, upper limits on their amplitudes are derived. These upper limits allow us to challenge an origin of cosmic rays above 1018 eV from stationary galactic sources densely distributed in the galactic disk and emitting predominantly light particles in all directions. Subject headings: astroparticle physics; cosmic rays