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Galactic cosmic-ray 2 H/4 He and 3 He/4 He ratios revisited

机译:重新探讨银河系宇宙射线2 H / 4 He和3 He / 4 He的比率

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摘要

The B/C ratio is widely used in the literature to constrain cosmic-ray propagation parameters. In this work,we revisit the constraints set by the less-well studied quartet nuclei ( 1 H, 2 H, 3 He, and 4 He), and compare them to thoseset by other secondary-to-primary ratios (e.g., B/C). We compile destruction and production cross-sections as well ascosmic-ray measurements of light elements ( 2 H, 3 He, 2 H/4 He, and 3 He/4 He). This allows us to test the universalityof propagation processes with species having different mass-to-charge ratios (A/Z). The parameters are derived usingthe USINE propagation package with a Markov Chain Monte Carlo (MCMC) technique. The latter is used to derivebest-fit parameters, but also to obtain the 68% and 95% credible regions and correlations between the parameters. Thisproceeding presents some preliminary results; the full analysis will be given in Coste et al. (in preparation).
机译:B / C比在文献中广泛用于约束宇宙射线传播参数。在这项工作中,我们将重新研究由研究较少的四重核(1 H,2 H,3 He和4 He)设定的约束,并将它们与其他次要/主要比率(例如B / C)。我们汇总了轻元素(2 H,3 He,2 H / 4 He和3 He / 4 He)的破坏和生产横截面以及宇宙射线测量结果。这使我们能够测试质荷比(A / Z)不同的物种的传播过程的普遍性。使用USINE传播程序包和Markov Chain Monte Carlo(MCMC)技术得出参数。后者用于推导最佳拟合参数,还用于获得68%和95%的可信区域以及参数之间的相关性。此过程提供了一些初步结果;完整的分析将在Coste等人中进行。 (在准备)。

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  • 来源
  • 会议地点 Beijing(CN)
  • 作者单位

    Laboratoire de Physique Subatomique et de Cosmologie, Universite Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut Polytechnique de Grenoble, 53 avenue des Martyrs, Grenoble, 38026, France;

    Laboratoire de Physique Subatomique et de Cosmologie, Universite Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut Polytechnique de Grenoble, 53 avenue des Martyrs, Grenoble, 38026, France;

    Laboratoire de Physique Subatomique et de Cosmologie, Universite Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut Polytechnique de Grenoble, 53 avenue des Martyrs, Grenoble, 38026, France;

    The Oskar Klein Centre for Cosmoparticle Physics, Department of Physics, Stockholm University, AlbaNova, SE-10691 Stockholm, Sweden;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 宇宙射线强度变化;
  • 关键词

    Cosmic-ray propagation, light nuclei, Markov Chain Monte Carlo;

    机译:宇宙射线传播,光核,马尔可夫链蒙特卡罗;

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