B/C和亚铁/铁Cosmic ray比-支持螺旋臂扩散模型的进一步证据
The B/C and sub-Iron/Iron Cosmic ray ratios - further evidence in favor of the spiral arm diffusion model
摘要：
硼碳比（B/C）和亚铁铁比（sub-Fe/Fe）为宇宙线在银河系内的传播提供了重要线索。这些比率估计了CR从其来源传播到地球时所经过的克重。试图解释这些比率内的标准CR传播模型需要特设的修改，甚至与这些模型需要不一致的克重来解释这两个比率。作为一种替代，物理动机的模型，我们提出，CR起源于银河系的旋臂。从动态螺旋臂的CR传播对各种次级与初级比率（例如B/C比率和正电子分数）具有重要的印记。我们使用我们的螺旋臂扩散模型与spectrometry网络扩展到镍计算亚Fe/Fe比。我们表明，没有任何额外的参数的螺旋臂模型一致地解释了这两个比率与相同的克重，提供了进一步的证据，有利于这个模型。
英文摘要：
The Boron to Carbon (B/C) and sub-Fe/Fe ratios provides an important clue on Cosmic Ray (CR) propagation within the Galaxy. These ratios estimate the grammage that the CR traverse as they propagate from their sources to Earth. Attempts to explain these ratios within the standard CR propagation models require ad hoc modifications and even with those these models necessitate inconsistent grammages to explain both ratios. As an alternative, physically motivated model, we have proposed that CR originate preferably within the galactic spiral arms. CR propagation from dynamic spiral arms has important imprints on various secondary to primary ratios, such as the B/C ratio and the positron fraction. We use our spiral arm diffusion model with the spallation network extended up to Nickel to calculate the sub-Fe/Fe ratio. We show that without any additional parameters the spiral arm model consistently explains both ratios with the same grammage, providing further evidence in favor of this model.
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