日冕物质抛射驱动激波中的波纹特征：关于粒子加速倾向的讨论
Corrugated Features in Coronal-mass-ejections-driven Shocks: A Discussion on the Predisposition to Particle Acceleration
摘要：
粒子加速的研究是日光层科学研究的一个基本要素。在这里，我们讨论的倾向，粒子加速周围的日冕物质抛射（CME）驱动的冲击波波纹状的功能。我们采用这些属性的冲击形成的扰动，由于双峰太阳风，日冕物质抛射偏转，不规则的日冕物质抛射膨胀，和太阳日冕中无处不在的波动。为了理解波浪冲击在粒子加速中的作用，我们定义了三个初始光滑冲击形态，每个形态都与快速CME相关。使用极高斯配置文件，我们模拟这些冲击在低日冕。我们利用代表介质扰动和CME活塞扰动的类波函数的组合，建立了光滑激波上的波纹现象。对于这两种类型的冲击，光滑和波纹，我们计算的冲击法线和径向上游冠状磁场之间的冲击法线角，以分类准平行和准垂直区域。我们认为，由于激波法线角在激波周围的不规则分布，波纹激波倾向于不同的粒子加速过程。我们认为CME不规则膨胀引起的扰动可能是粒子加速起源的决定性因素。最后，我们认为，接受激波的这些特征可能是研究鞘层和激波中的一些问题，如下游喷流、不稳定性、激波热化、激波稳定性和注入粒子过程的出发点。
英文摘要：
The study of the acceleration of particles is an essential element of research in the heliospheric science. Here, we discuss the predisposition to the particle acceleration around coronal mass ejections (CMEs)-driven shocks with corrugated wave-like features. We adopt these attributes on shocks formed from disturbances due to the bimodal solar wind, CME deflection, irregular CME expansion, and the ubiquitous fluctuations in the solar corona. In order to understand the role of a wavy shock in particle acceleration, we define three initial smooth shock morphologies each one associated with a fast CME. Using polar Gaussian profiles we model these shocks in the low corona. We establish the corrugated appearance on smooth shock by using combinations of wave-like functions that represent the disturbances from medium and CME piston. For both shock types, smooth and corrugated, we calculate the shock normal angles between the shock normal and the radial upstream coronal magnetic field in order to classify the quasi-parallel and quasi-perpendicular regions. We consider that corrugated shocks are predisposed to different process of particle acceleration due to irregular distributions of shock normal angles around of the shock. We suggest that disturbances due to CME irregular expansion may be a decisive factor in origin of particle acceleration. Finally, we regard that accepting these features on shocks may be the start point for investigating some questions in the sheath and shock, like downstream-jets, instabilities, shock thermalization, shock stability, and injection particle process.
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