点、团和细丝：年轻超新星遗迹随机磁场中同步辐射的间歇图像
Dots, clumps and filaments: the intermittent images of synchrotron emission in random magnetic fields of young supernova remnants
摘要：
某些超新星遗迹的非热X射线辐射来源于湍流磁场中超相对论粒子的同步辐射。我们解决了随机磁场对同步辐射图像和光谱的影响。本文模拟了一个随机磁场来构造一个具有稳定超相对论电子分布的源的同步辐射图。非稳定的局部结构（点，团块和细丝），其中的磁场达到非常高的值，通常出现在随机场样品。这些磁场浓度支配同步辐射（沿视线积分）从最高能量的电子在截止制度的分布，导致在一个不断发展的，间歇性的，clusified外观。模拟的结构类似于在一些年轻超新星遗迹的X射线图像中观察到的结构。X射线团簇的寿命可以短到足以与即使在稳定粒子分布的情况下观察到的一致。与从相同大小的均匀场发射相比，在湍流场中，来自电子光谱中的截止区的同步辐射的效率大大增强。
英文摘要：
Non-thermal X-ray emission in some supernova remnants originates from synchrotron radiation of ultra-relativistic particles in turbulent magnetic fields. We address the effect of a random magnetic field on synchrotron emission images and spectra. A random magnetic field is simulated to construct synchrotron emission maps of a source with a steady distribution of ultra-relativistic electrons. Non-steady localized structures (dots, clumps and filaments), in which the magnetic field reaches exceptionally high values, typically arise in the random field sample. These magnetic field concentrations dominate the synchrotron emission (integrated along the line of sight) from the highest energy electrons in the cut-off regime of the distribution, resulting in an evolving, intermittent, clumpy appearance. The simulated structures resemble those observed in X-ray images of some young supernova remnants. The lifetime of X-ray clumps can be short enough to be consistent with that observed even in the case of a steady particle distribution. The efficiency of synchrotron radiation from the cut-off regime in the electron spectrum is strongly enhanced in a turbulent field compared to emission from a uniform field of the same magnitude.
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