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arXiv 2602.10477astro-ph.SRphysics.space-ph
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数据驱动的日冕物质抛射启动多阶段磁流体动力学模拟

Data-driven Magnetohydrodynamic Simulation of the Initiation of a Coronal Mass Ejection with Multiple Stages

KU Leuven(荷语鲁汶大学);Nanjing University(南京大学);University of Maria Curie-Skłodowska(玛丽亚·居里-斯克沃多夫斯卡大学);Observatoire de Paris(巴黎天文台);CNRS(法国国家科学研究中心);UPMC(皮埃尔和玛丽·居里大学);Université Paris Diderot(巴黎第七大学);LUNEX EMMESI Institut(卢森堡EMMESI研究所)

J. H. Guo, S. Poedts, B. Schmieder, Y. Guo, C. Zhou, H. Wu, Y. W. Ni, Z. Zhong, Y. H. Zhou, S. H. Li, P. F. Chen

AI总结:

本研究通过数据驱动的磁流体动力学模拟,重现了日冕物质抛射的多阶段启动过程,展示了模型在预测CME起始方面的有效性。

摘要:

日冕物质抛射(CMEs)是导致恶劣空间天气事件的主要驱动因素,然而由于真实太阳源区中磁场拓扑和物理过程的复杂性,其启动和起始预测仍不够充分。在此,基于完全观测数据驱动的磁流体动力学模拟,我们成功地重现了起源于超活跃区域AR 13663的CME启动过程,观测中闪焰峰值与模拟中上升磁通绳速度峰值之间仅存在一分钟的时间延迟。此外,爆发结构表现出多阶段的运动演变:初始缓慢加速,一个近静止高度的平台期,以及随后的剧烈加速。这些阶段分别对应于环形不稳定性、上覆环形场施加的向下张力力,以及快速磁重联。我们的结果突显了真实事件中CME启动本质上是多阶段的。在强上覆环形场配置中,向下环形场诱导的张力力可以抑制磁通绳的上升并产生一个近稳定的平台期,即使环形不稳定性发生。相比之下,磁通绳下方的快速磁重联可以更有效地驱动剧烈爆发。观测与模拟峰值时间在一分钟内的紧密一致,证明了我们数据驱动模型在预测CME起始方面的强大潜力。

英文摘要:

Coronal mass ejections (CMEs) are the primary drivers of adverse space-weather events, yet their initiation and onset prediction remain insufficiently understood due to the complexity of the magnetic topology and physical processes in real solar source regions. Here, based on fully observational-data-driven magnetohydrodynamic simulation, we successfully reproduce the initiation of a CME originating from the super active region AR 13663, with only a one-minute time lag between the flare peak in observations and the velocity peak of the rising flux rope in the simulation. Moreover, the eruptive structure exhibits a multi-stage kinematic evolution: an initial slow acceleration, a plateau at a nearly stationary height, and a subsequent impulsive acceleration. These stages correspond to torus instability, the downward tension force exerted by the overlying toroidal field, and fast magnetic reconnection, respectively. Our results highlight the inherently multistage nature of CME initiation in real events. In configurations with strong overlying toroidal fields, the downward toroidal-field-induced tension force can suppress the rise of the flux rope and produce a plateau phase at a nearly stable height, even when torus instability occurs. In contrast, the subsequent fast magnetic reconnection beneath the flux rope can drive the impulsive eruption more effectively. The close agreement between the observed and simulated peak times over one minute demonstrates the strong potential of our data-driven model for predicting CME onset.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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