Hints of energy dependences in AGASA extremely high energy cosmic ray arrival directions
Hints of energy dependences in AGASA extremely high energy cosmic ray arrival directions
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AGASA极高能宇宙射线到达方向的能量依赖性的暗示
DOI：
10.1103/physrevd.67.092002
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发表时间：
2003
影响因子：
5
通讯作者：
M. O'Malley
中科院分区：
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作者：
W. Burgett;M. O'Malley
对能量在$4\ifmmode\times\else\texttimes\fi{}{10}^{19}\mathrm{eV}$以上的AGASA事件样本的到达方向分布的相关和概率分析表明，小尺度聚集在99.5char219.9%C.L.仍然是显著的，并与以前的结果一致。对于作为整体的样本，在大于$5\ifmmode^\cic\Else\TextDegree\fi的角度尺度上没有偏离均质性或各向同性。$具有$Eg~6\ifmmode\times\else\texttimes\fi{}{10}^{19}\mathrm{eV}$的事件样本不包含分隔为$L4\ifmmode^\circ\Else\TextDegree\fi的对。$按能量划分的交叉相关子样本在间隔$(4\char21{}5)\ifmmode\times\else\texttimes\fi{}{10}^{19}\mathrm{eV}，中显示三个不相关的分布$$(5\char21{}8)\ifmmode\times\else\texttimes\fi{}{10}^{19}\mathrm{eV}，和大于$8\ifmmode\times\else\texttimes\fi{}{10}^{19}\mathrm{eV}.$的分区与超星系赤道面相关，而其他两组在统计上符合各向同性分布。三组不同能量划分的事件的存在可能反映了初级成分的可能变化、不同的源分布、不同水平的GZK损失或磁场的偏转效应。
A correlation and probability analysis of the distribution of arrival directions for a sample of AGASA events reported to have energies above $4\ifmmode\times\else\texttimes\fi{}{10}^{19}\mathrm{eV}$ shows the small scale clustering to remain significant at the 99.5\char21{}99.9% C.L. and to be consistent with previous results. For the sample taken as a whole, there are no departures from either homogeneity or isotropy on angular scales greater than $5\ifmmode^\circ\else\textdegree\fi{}.$ The sample of events with $Eg~6\ifmmode\times\else\texttimes\fi{}{10}^{19}\mathrm{eV}$ contains no pairs with separations $l4\ifmmode^\circ\else\textdegree\fi{}.$ Cross correlating subsamples partitioned by energy reveal three uncorrelated distributions in the intervals $(4\char21{}5)\ifmmode\times\else\texttimes\fi{}{10}^{19}\mathrm{eV},$ $(5\char21{}8)\ifmmode\times\else\texttimes\fi{}{10}^{19}\mathrm{eV},$ and greater than $8\ifmmode\times\else\texttimes\fi{}{10}^{19}\mathrm{eV}.$ The partition with $5l~El8\ifmmode\times\else\texttimes\fi{}{10}^{19}\mathrm{eV}$ is correlated with the supergalactic equatorial plane while the other two groups are statistically consistent with isotropic distributions. The presence of three distinct energy-partitioned groups of events could reflect possible changes in primary composition, different source distributions, differing levels of GZK losses, or deflection effects of magnetic fields.
DOI：
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发表时间：
2000
期刊：
Astro Particle Physics 13
影响因子：
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作者：
M.Teshima;他
通讯作者：
他
武田 M：“细胞培养方法：肾小管细胞。肾细胞和分子生物学实验室技术”Karger。
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