冕流波及其冕震学应用研究综述

发布时间：2018-08-03 21:26

【摘要】：综述了我们近两年来在冕流波(Streamer Waves)现象研究方面的进展。冕流波是由日冕物质抛射(CME)和冕流结构相互作用所激发的、沿等离子体片向外传播的波动过程,是迄今发现的最大尺度的日冕波动现象。冕流波被解释为由冕流等离子体片片状结构所支持的快体积扭曲模式。基于这一理解,我们结合有关的太阳风速度和数密度方面的观测限制,发展了一种新的冕震学方法,可利用波动参数的观测结果推断冕流等离子体片区域在3-10太阳半径范围的阿尔芬速度和磁场强度的径向剖面。我们还在第23太阳活动周内找到了8例较好的CME-冕流摆动事件,其中5例被认定为冕流波事件。比较这些事件发现,导致冕流波激发的CME都具有很高的喷发速度和角宽度,CME与冕流大都从侧面发生相互作用,且作用的最初位置大都位于C2视场的底部或下方,所有正面CME均伴有耀斑现象。这些共同观测特征为我们理解冕流波的激发条件提供了线索。
[Abstract]:The research progress in coronal current wave (Streamer Waves) phenomenon in recent two years is reviewed. The coronal current wave is caused by the interaction between the coronal mass ejection (CME) and the coronal flow structure. The wave process propagating along the plasma sheet is the largest scale of coronal wave phenomenon discovered so far. The coronal current is interpreted as a fast volume twisted mode supported by a coronal flow plasma sheet structure. On the basis of this understanding, we have developed a new coronal seismological method in the light of the observed limitations of solar wind velocity and number density. The radial profiles of the Alfen velocity and magnetic field intensity in the region of coronal current plasma sheet in the range of 3-10 solar radius can be inferred from the observed results of the wave parameters. We also found 8 good CME-coronal current wobble events during the 23rd solar cycle, 5 of which were considered coronal current events. Comparing these events, it is found that the CME induced by coronal current waves have very high eruption velocity and angular width, and most of them interact with the coronal current from the side, and the initial position of the interaction is mostly located at the bottom or below the C2 field of view. All positive CME were accompanied by flare. These common observational characteristics provide clues for us to understand the excitation conditions of coronal current waves.
【作者单位】：山东大学空间科学研究院;山东大学威海分校空间科学与物理学院;亚伯里斯威斯大学数学与物理研究所;阿拉巴马汉茨维尔大学物理系空间等离子体与高层大气物理研究中心;
【基金】：国家自然科学基金资助项目(40825014,40890162,40904047(李波),40974105(夏利东),41028004(李刚)) 高等学校全国优秀博士学位论文作者专项资金(2007B24) 山东省自然科学基金资助项目(ZR2010DQ016(宋红强))
【分类号】：P182.62

【共引文献】