• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Astrophysical journal >UPPER LIMIT ON GAMMA-RAY FLUX ABOVE 10~(19) eV ESTIMATED BY THE AKENO GIANT AIR SHOWER ARRAY EXPERIMENT
【24h】

UPPER LIMIT ON GAMMA-RAY FLUX ABOVE 10~(19) eV ESTIMATED BY THE AKENO GIANT AIR SHOWER ARRAY EXPERIMENT

机译：AKENO GIANT空气喷枪阵列实验估算的伽玛射线通量的上限10〜（19）eV

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The origin of the highest energy cosmic rays (≥10~(20) eV) is not well understood. Interesting models called "top-down" scenarios have been proposed to explain the origin. The γ-ray flux in ultra-high-energy cosmic rays is a key parameter for giving constraints on such models. To study the properties of γ-ray showers, we carry out simulation studies that take into account both the Landau-Pomeranchuk-Migdal effect and electromagnetic interactions in the geomagnetic field. Based on an analysis of muons in air showers observed by the Akeno Giant Air Shower Array, the upper limits on the γ-ray flux are estimated to be 28% above 10~(19) eV and 67% above 10~(19.5) eV in the observed air showers at a confidence level of 95%. Above 10~(20) eV, the primary composition is in agreement with an extrapolation from lower energies, and there is no indication that the observed events are mostly γ-ray showers. These results provide observational constraints for origin models up to the highest energies.
机译：最高能量的宇宙射线（≥10〜（20）eV）的起源还不太清楚。已经提出了称为“自上而下”方案的有趣模型来解释其来源。超高能宇宙射线中的γ射线通量是限制此类模型的关键参数。为了研究γ射线阵雨的性质，我们进行了模拟研究，同时考虑了Landau-Pomeranchuk-Migdal效应和地磁场中的电磁相互作用。根据Akeno Giant风淋阵列观察到的风淋中的介子，分析得出，γ射线通量的上限为10〜（19）eV之上28％，而10〜（19.5）eV之上67％。在观察到的空气淋浴中，置信度为95％。高于10〜（20）eV，主要成分与较低能量的外推相符，并且没有迹象表明观察到的事件主要是γ射线阵雨。这些结果为最高能量的原始模型提供了观测约束。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号