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We carry out a three-dimensional magneto-hydrodynamic (MHD) simulation to model the initiation of the coronal mass ejection (CME) on 13 December 2006 in the emerging {\delta}-sunspot active region NOAA 10930. The setup of the simulation is…

太阳与恒星天体物理 · 物理学 2016-06-22 Yuhong Fan

We study the magnetic reconnection during a flare by investigating flare ribbon dynamics using observations and data-constrained magnetohydrodynamics (MHD) simulation. In particular, we estimate the reconnection flux and the reconnection…

太阳与恒星天体物理 · 物理学 2025-05-19 Sushree S Nayak , Qiang Hu , Wen He , Sanjay Kumar , Ramit Bhattacharyya

We perform a data-constrained simulation with the zero-$\beta$ assumption to study the mechanisms of strong rotation and failed eruption of a filament in active region 11474 on 2012 May 5 observed by Solar Dynamics Observatory and Solar…

太阳与恒星天体物理 · 物理学 2023-12-13 Xiaomeng Zhang , Jinhan Guo , Yang Guo , Mingde Ding , Rony Keppens

Three-dimensional magnetic topology is crucial to understanding the explosive release of magnetic energy in the corona during solar flares. Much attention has been given to the pre-flare magnetic topology to identify candidate sites of…

太阳与恒星天体物理 · 物理学 2018-12-12 Chaowei Jiang , Peng Zou , Xueshang Feng , Qiang Hu , Rui Liu , P. Vemareddy , Aiying Duan , Pingbing Zuo , Yi Wang , Fengsi Wei

Filament eruption is a common phenomenon in solar activity, but the triggering mechanism is not well understood. We focus our study on a filament eruption located in a complex nest of three active regions close to a coronal hole. The…

太阳与恒星天体物理 · 物理学 2024-06-04 Y. Liu , G. P. Ruan , B. Schmieder , J. H. Guo , Y. Chen , R. S. Zheng , J. T. Su , B. Wang

We present two-dimensional resistive magnetohydrodynamic simulations of line-tied asymmetric magnetic reconnection in the context of solar flare and coronal mass ejection current sheets. The reconnection process is made asymmetric along the…

太阳与恒星天体物理 · 物理学 2015-06-04 N. A. Murphy , M. P. Miralles , C. L. Pope , J. C. Raymond , H. D. Winter , K. K. Reeves , D. B. Seaton , A. A. van Ballegooijen , J. Lin

Solar eruptions are sudden ejections of coronal mass and magnetic fields accompanied by intense energy release. The eruptive structure does not always erupt successfully, but sometimes fails to escape the Sun after initiation. The failure…

太阳与恒星天体物理 · 物理学 2026-05-21 Tingyu Gou , Katharine K. Reeves , Peter R. Young , Astrid M. Veronig , Xingyao Chen , Sijie Yu , Bin Chen , Bin Zhuang

We describe and analyze observations by the Solar Dynamics Observatory of the emergence of a small, bipolar active region within an area of unipolar magnetic flux that was surrounded by a circular, quiescent filament. Within only eight…

太阳与恒星天体物理 · 物理学 2018-08-08 Sally Dacie , Tibor Torok , Pascal Demoulin , Mark Linton , Cooper Downs , Lidia van Driel-Gesztelyi , David Long , James Leake

Solar flares can release coronal magnetic energy explosively and may impact the safety of near-earth space environments. Their structures and properties on macroscale have been interpreted successfully by the generally-accepted…

太阳与恒星天体物理 · 物理学 2023-09-11 Yulei Wang , Xin Cheng , Mingde Ding , Zhaoyuan Liu , Jian Liu , Xiaojue Zhu

An isolated and fast decayed active region (NOAA 9729) was observed when passing through solar disk. There is only one CME related with it that give us a good opportunity to investigate the whole process of the CME. Filament in this active…

太阳与恒星天体物理 · 物理学 2017-03-15 Shangbin Yang , Wenbin Xie , Jihong Liu

Filament eruptions often lead to coronal mass ejections (CMEs), which can affect critical technological systems in space and on the ground when they interact with the geo-magnetosphere in high speeds. Therefore, it is an important issue to…

太阳与恒星天体物理 · 物理学 2015-05-20 Hongqiang Song , Yao Chen , Jie Zhang , Xin Cheng , Hui Fu , Gang Li

We report the first results of a magnetohydrodynamic (MHD) simulation of the development of a homologous sequence of three coronal mass ejections (CMEs) and demonstrate their so-called cannibalistic behavior. These CMEs originate from the…

太阳与恒星天体物理 · 物理学 2014-10-08 Piyali Chatterjee , Yuhong Fan

Coronal mass ejections (CMEs) are one of the primary manifestations of solar activity and can drive severe space weather effects. Therefore, it is vital to work towards being able to predict their occurrence. However, many aspects of CME…

太阳与恒星天体物理 · 物理学 2017-05-24 A. W. James , L. M. Green , E. Palmerio , G. Valori , H. A. S. Reid , D. Baker , D. H. Brooks , L. van Driel-Gesztelyi , E. K. J. Kilpua

Previous studies have revealed that solar coronal jets triggered by the eruption of mini-filaments (MFs) conform to the famous magnetic-breakout mechanism. In such scenario, a breakout current sheet (BCS) and a flare current sheet (FCS)…

太阳与恒星天体物理 · 物理学 2024-01-05 Liheng Yang , Xiaoli Yan , Zhike Xue , Zhe Xu , Qingmin Zhang , Yijun Hou , Jincheng Wang , Huadong Chen

In the solar corona, magnetic reconnection occurs due to the finite resistivity of the plasma. At the same time, resistivity leads to ohmic heating. Therefore, the reconnecting current sheet should heat the surrounding plasma. This paper…

太阳与恒星天体物理 · 物理学 2023-06-06 Anton Reva , Sergey Bogachev , Ivan Loboda , Artem Ulyanov , Alexey Kirichenko

Explosive energy release is a common phenomenon occurring in magnetized plasma systems ranging from laboratories, Earth's magnetosphere, the solar corona and astrophysical environments. Its physical explanation is usually attributed to…

太阳与恒星天体物理 · 物理学 2012-03-23 J. Zhang , X. Cheng , M. D. Ding

We study the emergence of a toroidal flux tube into the solar atmosphere and its interaction with a pre-existing field of an active region. We investigate the emission of jets as a result of repeated reconnection events between colliding…

太阳与恒星天体物理 · 物理学 2010-03-12 V. Archontis , K. Tsinganos , C. Gontikakis

Coronal mass ejections (CMEs) erupt and expand in a magnetically structured solar corona. Various indirect observational pieces of evidence have shown that the magnetic field of CMEs reconnects with surrounding magnetic fields, forming,…

We present an investigation of an eruption event of coronal mass ejection (CME) magnetic flux rope (MFR) from source active region (AR) NOAA 11719 on 11 April 2013 utilizing observations from SDO, STEREO, SOHO, and WIND spacecraft. The…

太阳与恒星天体物理 · 物理学 2015-10-08 P. Vemareddy , W. Mishra

We present observations of the eruption and then reformation of a filament caused by its nearby emerging magnetic flux. Driven by the emerging magnetic flux, the emerged positive fluxes moved toward and cancelled with its nearby negative…

太阳与恒星天体物理 · 物理学 2019-04-03 Bo Yang , Huadong Chen