Evolution of a streamer-blowout CME as observed by imagers on Parker Solar Probe and the Solar Terrestrial Relations Observatory
Evolution of a streamer-blowout CME as observed by imagers on Parker Solar Probe and the Solar Terrestrial Relations Observatory
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帕克太阳探测器和日地关系天文台成像仪观测到的流光井喷日冕物质抛射的演变
DOI：
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发表时间：
2020
影响因子：
6.5
通讯作者：
P. Penteado
中科院分区：
文献类型：
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作者：
P. Liewer;J. Qiu;A. Vourlidas;J. Hall;P. Penteado
上下文2020年1月26日至27日，帕克太阳探测器（PSP）上的太阳探测器广域成像仪在距离约30 R的地方观测到日冕物质抛射（CME），当时它穿过仪器的95°视场，为CME内部结构的通量绳形态提供了前所未有的视图。日地关系天文台（STEREO-A）于1月25日开始观测到同样的日冕物质抛射。
目标。我们的目标是了解起源并确定这一CME的轨迹。
方法.我们分析了来自三个位置良好的航天器的数据：PSP，STEREO-A和太阳动力学观测台（SDO）。使用跟踪和拟合技术确定CME轨迹，并使用STEREO-A的CME传播的同步图像进行验证。与STEREO-A的偶然对准也提供了导致爆发的日冕活动的视图。SDO的观测结果，结合日冕的潜在磁场模型，被用来分析1月25日从日冕中喷射出通量绳之前三天的日冕磁场演化。
结果我们发现，1月25日的CME可能是1月23日开始的缓慢磁通绳喷发的最终结果，并由STEREO-A/极紫外成像仪观测到。对这些观测结果的分析表明，在1月25日最后一次喷射之前，通量绳显然被限制在日冕中超过一天。STEREO-A/COR 2观测到1月25日喷发前几个小时上覆流光的膨胀和增亮，这使我们将其归类为流光井喷CME。对SDO数据的分析表明，一个新出现的活动区引起的日冕磁场的重组导致了磁绳的最终喷射。
Context. On 26–27 January 2020, the Wide-field Imager for Solar Probe on Parker Solar Probe (PSP) observed a coronal mass ejection (CME) from a distance of approximately 30 R⊙ as it passed through the instrument’s 95° field-of-view, providing an unprecedented view of the flux rope morphology of the CME’s internal structure. The same CME was seen by Solar Terrestrial Relations Observatory-Ahead (STEREO-A), beginning on 25 January.
Aims. Our goal is to understand the origin and determine the trajectory of this CME.
Methods. We analyzed data from three well-placed spacecrafts: PSP, STEREO-A, and Solar Dynamics Observatory (SDO). The CME trajectory was determined using a tracking-and-fitting technique and verified using simultaneous images of the CME propagation from STEREO-A. The fortuitous alignment with STEREO-A also provided views of coronal activity leading up to the eruption. Observations from SDO, in conjunction with potential magnetic field models of the corona, were used to analyze the coronal magnetic evolution for the three days leading up to the flux rope ejection from the corona on 25 January.
Results. We found that the 25 January CME is likely the end result of a slow magnetic flux rope eruption that began on 23 January and was observed by STEREO-A/Extreme Ultraviolet Imager. The analysis of these observations suggest that the flux rope was apparently constrained in the corona for more than a day before its final ejection on 25 January. STEREO-A/COR2 observations of swelling and brightening of the overlying streamer for several hours prior to eruption on 25 January led us to classify this as a streamer-blowout CME. The analysis of the SDO data suggests that restructuring of the coronal magnetic fields caused by an emerging active region led to the final ejection of the flux rope.
影响因子：
2.8
作者：
T. Conlon;S. Milan;J. Davies
通讯作者：
T. Conlon;S. Milan;J. Davies