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arXiv 1002.1975astro-ph.HE
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用皮埃尔俄歇天文台测量10^18 eV以上宇宙射线的能谱

Measurement of the energy spectrum of cosmic rays above 10^18 eV using the Pierre Auger Observatory

The Pierre Auger Collaboration

摘要:

我们报告了一个测量的宇宙射线通量与前所未有的精度和统计使用皮埃尔俄歇天文台。基于至少与一个表面探测器同时进行的荧光观测,我们导出了能量高于10^18 eV的光谱。我们还更新了以前发表的能谱与表面探测器阵列。这两个光谱相结合,解决系统的不确定性,特别是能量分辨率对光谱形状的影响。该光谱可以用破幂律E^-γ来描述,踝关节以下的指数γ =3.3,在log 10(E/eV)= 18.6处测量。在踝关节以上,光谱由指数为2.6的幂律描述,随后是通量抑制,高于约log 10(E/eV)= 19.5,检测到具有高统计显著性。

英文摘要:

We report a measurement of the flux of cosmic rays with unprecedented precision and statistics using the Pierre Auger Observatory. Based on fluorescence observations in coincidence with at least one surface detector we derive a spectrum for energies above 10^18 eV. We also update the previously published energy spectrum obtained with the surface detector array. The two spectra are combined addressing the systematic uncertainties and, in particular, the influence of the energy resolution on the spectral shape. The spectrum can be described by a broken power law E^-gamma with index gamma=3.3 below the ankle which is measured at log10(E/eV) = 18.6. Above the ankle the spectrum is described by a power law with index 2.6 followed by a flux suppression, above about log10(E/eV) = 19.5, detected with high statistical significance.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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