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arXiv 0709.0772astro-ph
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皮埃尔·俄歇南方天文台增强后的天体物理学动机

Astrophysics Motivation behind the Pierre Auger Southern Observatory Enhancements

Gustavo Medina-Tanco

摘要:

皮埃尔·俄歇合作组织打算将其在阿根廷的南方观测站的能量范围从0.1 EeV扩大到3 EeV,以获得高质量的数据。在随附的论文中描述的扩展,包括三个额外的荧光望远镜,具有更高的视场(HEAT)和嵌套的表面阵列,分别具有750和433米的间距和额外的μ子探测能力(AMIGA)。探测器的增强将允许使用相同的技术测量宇宙射线,从第二膝以下到所观察到的最高能量。通过第二个膝盖和脚踝的光谱的演变,以及相应的预测的组成变化,是至关重要的理解结束银河系的限制和传播的影响,对较低的能量部分的河外通量。后者与源的宇宙学分布和注入光谱的组成密切相关。我们讨论了这些增强背后的科学动机,以及合并热和AMIGA信息的淋浴模拟和重建技术的评估的影响。

英文摘要:

The Pierre Auger Collaboration intends to extend the energy range of its southern observatory in Argentina for high quality data from 0.1 to 3 EeV. The extensions, described in accompanying papers, include three additional fluorescence telescopes with a more elevated field of view (HEAT) and a nested surface array with 750 and 433 m spacing respectively and additional muon detection capabilities (AMIGA). The enhancement of the detector will allow measurement of cosmic rays, using the same techniques, from below the second knee up to the highest energies observed. The evolution of the spectrum through the second knee and ankle, and corresponding predicted changes in composition, are crucial to the understanding of the end of Galactic confinement and the effects of propagation on the lower energy portion of the extragalactic flux. The latter is strongly related to the cosmological distribution of sources and to the composition of the injected spectrum. We discuss the science motivation behind these enhancements as well as the impact of combined HEAT and AMIGA information on the assessment of shower simulations and reconstruction techniques.

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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