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arXiv 0707.2638astro-ph
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皮埃尔俄歇天文台测量的UHECR谱及其天体物理意义

The UHECR spectrum measured at the Pierre Auger Observatory and its astrophysical implications

T. Yamamoto

摘要:

皮埃尔·俄歇天文台的南部已接近完成,自2004年1月以来一直在稳定运行,同时规模也在扩大。迄今为止收集的大量数据样本使UHE宇宙射线能谱的测量在统计和系统不确定性方面都比皮埃尔·俄歇天文台以前报告的有了显著的改进。我们总结了两个测量的能谱,一个基于高统计表面检测器的数据,和其他的混合数据,其中荧光测量的精度提高了额外的信息从表面阵列。强调了这两种方法的互补性,并对结果进行了比较。可能的天体物理影响,我们的测量,特别是光谱特征的存在下,进行了讨论。

英文摘要:

The Southern part of the Pierre Auger Observatory is nearing completion, and has been in stable operation since January 2004 while it has grown in size. The large sample of data collected so far has led to a significant improvement in the measurement of the energy spectrum of UHE cosmic rays over that previously reported by the Pierre Auger Observatory, both in statistics and in systematic uncertainties. We summarize two measurements of the energy spectrum, one based on the high-statistics surface detector data, and the other of the hybrid data, where the precision of the fluorescence measurements is enhanced by additional information from the surface array. The complementarity of the two approaches is emphasized and results are compared. Possible astrophysical implications of our measurements, and in particular the presence of spectral features, are discussed.

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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