Cosmic-Ray Modulation by Solar Wind
Cosmic-Ray Modulation by Solar Wind
复制标题
太阳风的宇宙射线调制
DOI：
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发表时间：
1958
期刊：
影响因子：
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通讯作者：
E. Parker
中科院分区：
文献类型：
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作者：
E. Parker
本章重点讨论太阳风对宇宙射线的调制。比尔曼观察到，在太阳活动期间，气体从太阳的流体动力流出导致太阳系内部的宇宙射线强度降低。福布什型减少是一种局部地心现象，是太阳流出气体扰乱外部地磁场的结果。最近的研究表明，气体从太阳向各个方向向外的流体动力流动拉伸了太阳磁场的磁力线，并导致太阳系内部形成基本上径向的磁场。这种向外流动的气体（太阳风）的高速度和低密度，由于各向异性膨胀而导致各向异性热运动。
This chapter focuses on cosmic-ray modulation by solar wind. The hydrodynamic outflow of gas from the Sun as observed by Biermann results in a reduction of the cosmic-ray intensity in the inner solar system during the years of solar activity. The Forbush-type decrease, which is a local geocentric phenomenon, is the result of disordering of the outer geomagnetic field by the outflowing gas from the Sun. It was recently shown that the hydrodynamic flow of gas outward in all directions from the Sun stretches out the magnetic lines of force of the solar magnetic fields, and leads to an essentially radial magnetic field in the inner solar system. The high velocity and low density of this outward streaming gas, the solar wind, leads to anisotropic thermal motions as a consequence of the anisotropic expansion.