首页> 外文期刊>Astroparticle physics >GZK photons in the minimal ultra-high energy cosmic rays model
【24h】

GZK photons in the minimal ultra-high energy cosmic rays model

机译:极小超高能宇宙射线模型中的GZK光子

获取原文
获取原文并翻译 | 示例
           

摘要

in a recently proposed model the cosmic rays spectrum at energies above 10(18) eV can be fitted with a minimal number of unknown parameters assuming that the extragalactic cosmic rays are only protons with a power law source spectrum similar to E-alpha and alpha similar or equal to 2.6. Within this minimal model, after fitting the observed HiRes spectrum with four parameters (proton injection spectrum power law index and maximum energy, minimum distance to sources and evolution parameter) we compute the flux of ultra-high energy photons due to photon-pion production, the GZK photons, for several radio background models and average extragalactic magnetic fields with amplitude between 10(-11) G and 10(-9) G. We find the photon fraction to be between 10(-4) and 10(-3) in cosmic rays at energies above 10(19) eV. These small fluxes could only be detected in future experiments like Auger North plus South, EUSO and OWL. (c) 2007 Elsevier B.V. All rights reserved.
机译:在最近提出的模型中,假设银河系外宇宙射线仅是具有与E-α和α相似的幂律源光谱的质子,则能量高于10(18)eV的宇宙线光谱可以拟合最少数量的未知参数。等于2.6。在此最小模型内,将观察到的HiRes光谱与四个参数(质子注入光谱功率定律指数和最大能量,到源的最小距离和演化参数)拟合后,我们计算了由于光子产生而产生的超高能光子的通量, GZK光子,对于几个无线电背景模型和幅度在10(-11)G和10(-9)G之间的平均河外磁场。我们发现光子分数在10(-4)和10(-3)之间能量大于10(19)eV的宇宙射线中。这些较小的通量只能在未来的实验(如俄歇北加南,EUSO和OWL)中检测到。 (c)2007 Elsevier B.V.保留所有权利。

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