THEORETICAL EXPLANATION OF THE COSMIC-RAY PERPENDICULAR DIFFUSION COEFFICIENT IN THE NEARBY STARBURST GALAXY NGC 253
THEORETICAL EXPLANATION OF THE COSMIC-RAY PERPENDICULAR DIFFUSION COEFFICIENT IN THE NEARBY STARBURST GALAXY NGC 253
复制标题
近邻星暴星系NGC 253宇宙射线垂直扩散系数的理论解释
DOI：
10.1088/0004-637x/764/1/37
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
A. Shalchi
中科院分区：
文献类型：
--
作者：
K. Buffie;Volker Heesen;A. Shalchi
扩散系数通常用来描述宇宙射线在宇宙中的传播。虽然这种输运参数可以从太阳系的实验中获得，但很难确定银河系或外部星系中的扩散系数。最近，在邻近的星暴星系ngc253中，已经提出了一个垂直扩散系数的值。在本文中，我们利用垂直扩散的一种先进的解析理论，从理论上再现了这个值。
Diffusion coefficients are usually used to describe the propagation of cosmic rays through the universe. Whereas such transport parameters can be obtained from experiments in the solar system, it is difficult to determine diffusion coefficients in the Milky Way or in external galaxies. Recently, a value for the perpendicular diffusion coefficient in the nearby starburst galaxy NGC 253 has been proposed. In the present paper, we reproduce this value theoretically by using an advanced analytical theory for perpendicular diffusion.