Eruptions of two flux ropes observed by SDO and STEREO
Eruptions of two flux ropes observed by SDO and STEREO
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DOI：
10.1051/0004-6361/201221005
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发表时间：
2013-04
影响因子：
6.5
通讯作者：
Leping Li;Jun Zhang
中科院分区：
文献类型：
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作者：
Leping Li;Jun Zhang
目标。本文首次报道了SDO和STEREO同时观测到的两个磁绳的冷热分量，以及磁绳喷发与日冕物质抛射(CME)的关系。方法：研究方法。利用同步辐射和立体A、B观测资料，研究了2012年1月23日11402活动区的两条通量绳喷发事件及其相关活动。结果。在SDO/AIA94A(∼6.4MK)和131A(∼10MK)图像中，0点44UT出现扭曲的磁绳，位于AR 11402。25分钟后，出现另一条较长的马鞍形磁绳，具有扭曲的精细结构。这是位于两个AR11401和11402。这两根钢丝绳先是快速上升，然后缓慢上升，最后又快速上升。在立体A和B 195A(∼1.4MK)、304A(0.06-0.08MK)、284A(∼1.8MK)和171A(∼1.0MK)观测中也发现了这两条通量绳。我们认为熔剂绳既有热的成分，也有冷的成分。研究了与CME相关的磁绳喷发，发现喷发的磁绳与CME亮核是共空间的，其上扩展的通量环与CME亮锋是共空间的。
Aims. We report for the first time the hot and cool components of two flux ropes simultaneously observed by SDO and STEREO, and the relationship between the flux rope eruptions and the coronal mass ejection (CME). Methods. Employing SDO and STEREO A and B observations, we investigated the eruptive event of two flux ropes and their associated activities in active region (AR) 11402 on January 23, 2012. Results. In SDO/AIA 94 A (∼6.4 MK) and 131 A (∼10 MK) images, a twisted flux rope appeared from 00:44 UT, which was located in AR 11402. Another longer saddle-shaped flux rope, with twisted fine structures, appeared 25 min later. This was located across the two ARs11401 and 11402. These twoflux ropes initiallyrose rapidly, then slowly, andfinally were again accelerated fast. The twoflux ropes are also identified in the STEREO A and B 195 A (∼1.4 MK), 304 A (0.06‐0.08 MK), 284 A (∼1.8 MK), and 171 A (∼1.0 MK) observations. We suggest that the flux ropes may have both hot and cool components. Investigating the flux rope eruptions with their associated CME, we find that the erupting flux ropes are co-spatial with the CME bright core and the expanding overlying flux loops with the CME bright front.