论文标题
一种整体方法，可以了解星际冠状动脉质量弹出的氦气富集：新见解
A holistic approach to understand Helium enrichment in Interplanetary coronal mass ejections: New insights
论文作者
论文摘要
尽管在太阳光球/色球高度下，氦气丰度（AHE = NH/NHE）约为8％，但在许多情况下，AHE在行星际冠状动脉质量弹出（ICMES）中的AHE在许多情况下都超过8％。尽管过去已经调用了各种因素，例如星际冲击，色球蒸发和“去除污泥”，以解决ICMES中的AHE增强功能，但这些过程都无法全面解释ICMES中AHE的变异性。基于对275个ICME事件的广泛分析，我们表明ICME平均AHE值有太阳活动变化。研究还表明，第一个电离电位效应以及冠状温度并不是ICMES增强AHE能力的主要因素。对63例的同时太阳耀斑和ICME事件的调查表明，与重力沉降的串联串联蒸发确定了ICMES超过8％的AHE增强和变异性。虽然色球蒸发使氦从色球层释放到电晕，但在ICMES期间将重力沉降的氦气抛弃。我们表明，来自同一活性区域的前面耀斑的强度和时机是从CME爆发的重要因素，以了解ICMES中的AHE AHE的重要因素。
Despite helium abundance (AHe = nH/nHe) is ~ 8 % at the solar photospheric/chromospheric heights, AHe can be found to exceed 8% in interplanetary coronal mass ejections (ICMEs) on many occasions. Although various factors like interplanetary shocks, chromospheric evaporation and "sludge removal" have been separately invoked in the past to address the AHe enhancements in ICMEs, none of these processes could explain the variability of AHe in ICMEs comprehensively. Based on extensive analysis of 275 ICME events, we show that there is a solar activity variation of ICME averaged AHe values. The investigation also reveals that the first ionization potential effect as well as coronal temperature are not the major contributing factors for AHe enhancements in ICMEs. Investigation on concurrent solar flares and ICME events for 63 cases reveals that chromospheric evaporation in tandem with gravitational settling determine the AHe enhancements and variabilities beyond 8% in ICMEs. While chromospheric evaporation releases the helium from chromosphere into the corona, the gravitationally settled helium is thrown out during the ICMEs.We show that the intensity and timing of the preceding flares from the same active region from where the CME erupts are important factors to understand the AHe enhancements in ICMEs.
