A Model for the Coupled Eruption of a Pseudostreamer and Helmet Streamer
A Model for the Coupled Eruption of a Pseudostreamer and Helmet Streamer
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DOI：
10.3847/1538-4357/abd9ca
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发表时间：
2021-01
期刊：
影响因子：
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通讯作者：
P. Wyper;S. Antiochos;C. DeVore;B. Lynch;J. Karpen;P. Kumar
中科院分区：
文献类型：
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作者：
P. Wyper;S. Antiochos;C. DeVore;B. Lynch;J. Karpen;P. Kumar
太阳活动的一个非常重要的方面是喷发和周围日冕磁场拓扑之间的耦合，这决定了事件的轨迹和形态，甚至可能导致来自多个来源的交感喷发。本文对一种新型的耦合喷发进行了数值模拟，在这种耦合喷发中，由大的伪流光细丝喷发的日冕喷流触发了邻近头盔流光的流光-日冕物质抛射(CME)。我们的构型在极冕洞和一个小的赤道冕洞之间有一个很大的相反极区，形成了一个伪流光，它的两侧是冕洞和头盔流光。在更远的地方，伪流光柄在日光层中呈延长的弧形。我们通过沿伪流光中的一段极性反转线施加光球剪切来给系统提供能量。由此产生的剪切式拱廊细丝通道形成了一条通量绳，最终喷发为典型的日冕孔型射流。然而，随着喷流的发射，通道上方增强的突破口重新连接进入邻近的头盔流光，沿着闭合的头盔流光场线部分发射喷流，并吹出流光顶部，产生典型的气泡状CME。这个CME强烈偏离喷流的初始轨迹，包含开放和封闭磁力线的混合体。我们介绍了这种新型耦合喷发的详细动力学，其基本机制，以及这项工作对解释现场和遥感观测的影响。
A highly important aspect of solar activity is the coupling between eruptions and the surrounding coronal magnetic field topology, which determines the trajectory and morphology of the event and can even lead to sympathetic eruptions from multiple sources. In this paper, we report on a numerical simulation of a new type of coupled eruption, in which a coronal jet initiated by a large pseudostreamer filament eruption triggers a streamer-blowout coronal mass ejection (CME) from the neighboring helmet streamer. Our configuration has a large opposite-polarity region positioned between the polar coronal hole and a small equatorial coronal hole, forming a pseudostreamer flanked by the coronal holes and the helmet streamer. Further out, the pseudostreamer stalk takes the shape of an extended arc in the heliosphere. We energize the system by applying photospheric shear along a section of the polarity inversion line within the pseudostreamer. The resulting sheared-arcade filament channel develops a flux rope that eventually erupts as a classic coronal-hole-type jet. However, the enhanced breakout reconnection above the channel as the jet is launched progresses into the neighboring helmet streamer, partially launching the jet along closed helmet streamer field lines and blowing out the streamer top to produce a classic bubble-like CME. This CME is strongly deflected from the jet’s initial trajectory and contains a mixture of open and closed magnetic field lines. We present the detailed dynamics of this new type of coupled eruption, its underlying mechanisms, and the implications of this work for the interpretation of in situ and remote-sensing observations.