Propagation of injected cosmic rays under distributed reacceleration
Propagation of injected cosmic rays under distributed reacceleration
复制标题
分布式再加速下注入宇宙射线的传播
DOI：
10.1086/163780
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
K. Mathis
中科院分区：
文献类型：
--
作者：
M. Simon;W. Heinrich;K. Mathis
宇宙线加速模型中，粒子在星际空间中通过遭遇激波从随机过程中不断获得能量，导致次级与初级比随能量呈对数增长，这与观测结果不符。因此，观测到的次级与初级比率的下降可能表明，相当大一部分的加速是在源处迅速发生的。另一方面，天文观测表明，超新星的冲击确实存在于银河系中，行星际空间的观测显示了冲击加速作用的明确证据。
The cosmic ray acceleration model in which the particles gain continuously energy from stochastic processes in the interstellar space by encountering shocks leads to a logarithmic increase in the secondary to primary ratios with energy, which is inconsistent with observations. The observed decrease of the secondary to primary ratios may therefore suggest that a considerable part of the acceleration has taken place rapidly at the sources. Astronomical observations on the other hand indicate that shocks from supernovae do exist in the galaxy and observations in the interplanetary space show clear evidence that shock acceleration works.